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China OEM Manufacturer 10ass Simplex Stainless Steel Gearbox Belt Transmission Parts Engineering and Construction Machinery Short Pitch Roller Chains and Bush Chain

Product Description

Chain No. Pitch

P
mm

Roller diameter

d1max
mm

Width between inner plates
b1min
mm
Pin diameter

d2max
mm

Pin length Inner plate depth
h2max
mm
Plate thickness
t/Tmax
mm
Transverse pitch
Pt
mm
Breaking load

Q
kN/lbf

Weight per meter
q
kg/m
Lmax
mm
Lcmax
mm
12BSS-3 19.050 12.07 11.68 5.72 61.50 63.10 16.00 1.85 19.46 55.5/12477 3.71

*Bush chain:d1 in the table indicates the external diameter of the bush
*Straight side plates
Stainless steel chains are suitable for corrosive conditions involving food,chemicals pharmaceuticals,etc.and also suitable for high and low temperature conditions.

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Roller chain
Roller chain or bush roller chain is the type of chain drive most commonly used for transmission of mechanical power on many kinds of domestic, industrial and agricultural machinery, including conveyors, wire- and tube-drawing machines, printing presses, cars, motorcycles, and bicycles. It consists of a series of short cylindrical rollers held together by side links. It is driven by a toothed wheel called a sprocket. It is a simple, reliable, and efficient[1] means of power transmission.

Though CHINAMFG Renold is credited with inventing the roller chain in 1880, sketches by Leonardo da Vinci in the 16th century show a chain with a roller bearing.

Construction of the chain
Two different sizes of roller chain, showing construction.
There are 2 types of links alternating in the bush roller chain. The first type is inner links, having 2 inner plates held together by 2 sleeves or bushings CHINAMFG which rotate 2 rollers. Inner links alternate with the second type, the outer links, consisting of 2 outer plates held together by pins passing through the bushings of the inner links. The “bushingless” roller chain is similar in operation though not in construction; instead of separate bushings or sleeves holding the inner plates together, the plate has a tube stamped into it protruding from the hole which serves the same purpose. This has the advantage of removing 1 step in assembly of the chain.

The roller chain design reduces friction compared to simpler designs, resulting in higher efficiency and less wear. The original power transmission chain varieties lacked rollers and bushings, with both the inner and outer plates held by pins which directly contacted the sprocket teeth; however this configuration exhibited extremely rapid wear of both the sprocket teeth, and the plates where they pivoted on the pins. This problem was partially solved by the development of bushed chains, with the pins holding the outer plates passing through bushings or sleeves connecting the inner plates. This distributed the wear over a greater area; however the teeth of the sprockets still wore more rapidly than is desirable, from the sliding friction against the bushings. The addition of rollers surrounding the bushing sleeves of the chain and provided rolling contact with the teeth of the sprockets resulting in excellent resistance to wear of both sprockets and chain as well. There is even very low friction, as long as the chain is sufficiently lubricated. Continuous, clean, lubrication of roller chains is of primary importance for efficient operation as well as correct tensioning.

Lubrication
Many driving chains (for example, in factory equipment, or driving a camshaft inside an internal combustion engine) operate in clean environments, and thus the wearing surfaces (that is, the pins and bushings) are safe from precipitation and airborne grit, many even in a sealed environment such as an oil bath. Some roller chains are designed to have o-rings built into the space between the outside link plate and the inside roller link plates. Chain manufacturers began to include this feature in 1971 after the application was invented by Joseph Montano while working for Whitney Chain of Hartford, Connecticut. O-rings were included as a way to improve lubrication to the links of power transmission chains, a service that is vitally important to extending their working life. These rubber fixtures form a barrier that holds factory applied lubricating grease inside the pin and bushing wear areas. Further, the rubber o-rings prevent dirt and other contaminants from entering inside the chain linkages, where such particles would otherwise cause significant wear.[citation needed]

There are also many chains that have to operate in dirty conditions, and for size or operational reasons cannot be sealed. Examples include chains on farm equipment, bicycles, and chain saws. These chains will necessarily have relatively high rates of wear, particularly when the operators are prepared to accept more friction, less efficiency, more noise and more frequent replacement as they neglect lubrication and adjustment.

Many oil-based lubricants attract dirt and other particles, eventually forming an CHINAMFG paste that will compound wear on chains. This problem can be circumvented by use of a “dry” PTFE spray, which forms a solid film after application and repels both particles and moisture.

Variants in design

Layout of a roller chain: 1. Outer plate, 2. Inner plate, 3. Pin, 4. Bushing, 5. Roller
If the chain is not being used for a high wear application (for instance if it is just transmitting motion from a hand-operated lever to a control shaft on a machine, or a sliding door on an oven), then 1 of the simpler types of chain may still be used. Conversely, where extra strength but the smooth drive of a smaller pitch is required, the chain may be “siamesed”; instead of just 2 rows of plates on the outer sides of the chain, there may be 3 (“duplex”), 4 (“triplex”), or more rows of plates running parallel, with bushings and rollers between each adjacent pair, and the same number of rows of teeth running in parallel on the sprockets to match. Timing chains on automotive engines, for example, typically have multiple rows of plates called strands.

Roller chain is made in several sizes, the most common American National Standards Institute (ANSI) standards being 40, 50, 60, and 80. The first digit(s) indicate the pitch of the chain in eighths of an inch, with the last digit being 0 for standard chain, 1 for lightweight chain, and 5 for bushed chain with no rollers. Thus, a chain with half-inch pitch would be a #40 while a #160 sprocket would have teeth spaced 2 inches apart, etc. Metric pitches are expressed in sixteenths of an inch; thus a metric #8 chain (08B-1) would be equivalent to an ANSI #40. Most roller chain is made from plain carbon or alloy steel, but stainless steel is used in food processing machinery or other places where lubrication is a problem, and nylon or brass are occasionally seen for the same reason.

Roller chain is ordinarily hooked up using a master link (also known as a connecting link), which typically has 1 pin held by a horseshoe clip rather than friction fit, allowing it to be inserted or removed with simple tools. Chain with a removable link or pin is also known as cottered chain, which allows the length of the chain to be adjusted. Half links (also known as offsets) are available and are used to increase the length of the chain by a single roller. Riveted roller chain has the master link (also known as a connecting link) “riveted” or mashed on the ends. These pins are made to be durable and are not removable.

Use

An example of 2 ‘ghost’ sprockets tensioning a triplex roller chain system
Roller chains are used in low- to mid-speed drives at around 600 to 800 feet per minute; however, at higher speeds, around 2,000 to 3,000 feet per minute, V-belts are normally used due to wear and noise issues.
A bicycle chain is a form of roller chain. Bicycle chains may have a master link, or may require a chain tool for removal and installation. A similar but larger and thus stronger chain is used on most motorcycles although it is sometimes replaced by either a toothed belt or a shaft drive, which offer lower noise level and fewer maintenance requirements.
The great majority of automobile engines use roller chains to drive the camshaft(s). Very high performance engines often use gear drive, and starting in the early 1960s toothed belts were used by some manufacturers.
Chains are also used in forklifts using hydraulic rams as a pulley to raise and lower the carriage; however, these chains are not considered roller chains, but are classified as lift or leaf chains.
Chainsaw cutting chains superficially resemble roller chains but are more closely related to leaf chains. They are driven by projecting drive links which also serve to locate the chain CHINAMFG the bar.

Sea Harrier FA.2 ZA195 front (cold) vector thrust nozzle – the nozzle is rotated by a chain drive from an air motor
A perhaps unusual use of a pair of motorcycle chains is in the Harrier Jump Jet, where a chain drive from an air motor is used to rotate the movable engine nozzles, allowing them to be pointed downwards for hovering flight, or to the rear for normal CHINAMFG flight, a system known as Thrust vectoring.
 

Wear

The effect of wear on a roller chain is to increase the pitch (spacing of the links), causing the chain to grow longer. Note that this is due to wear at the pivoting pins and bushes, not from actual stretching of the metal (as does happen to some flexible steel components such as the hand-brake cable of a motor vehicle).

With modern chains it is unusual for a chain (other than that of a bicycle) to wear until it breaks, since a worn chain leads to the rapid onset of wear on the teeth of the sprockets, with ultimate failure being the loss of all the teeth on the sprocket. The sprockets (in particular the smaller of the two) suffer a grinding motion that puts a characteristic hook shape into the driven face of the teeth. (This effect is made worse by a chain improperly tensioned, but is unavoidable no matter what care is taken). The worn teeth (and chain) no longer provides smooth transmission of power and this may become evident from the noise, the vibration or (in car engines using a timing chain) the variation in ignition timing seen with a timing light. Both sprockets and chain should be replaced in these cases, since a new chain on worn sprockets will not last long. However, in less severe cases it may be possible to save the larger of the 2 sprockets, since it is always the smaller 1 that suffers the most wear. Only in very light-weight applications such as a bicycle, or in extreme cases of improper tension, will the chain normally jump off the sprockets.

The lengthening due to wear of a chain is calculated by the following formula:

{\displaystyle \%=((M-(S*P))/(S*P))*100}

 

M = the length of a number of links measured

S = the number of links measured

P = Pitch

In industry, it is usual to monitor the movement of the chain tensioner (whether manual or automatic) or the exact length of a drive chain (one rule of thumb is to replace a roller chain which has elongated 3% on an adjustable drive or 1.5% on a fixed-center drive). A simpler method, particularly suitable for the cycle or motorcycle user, is to attempt to pull the chain away from the larger of the 2 sprockets, whilst ensuring the chain is taut. Any significant movement (e.g. making it possible to see through a gap) probably indicates a chain worn up to and beyond the limit. Sprocket damage will result if the problem is ignored. Sprocket wear cancels this effect, and may mask chain wear.

Chain strength

The most common measure of roller chain’s strength is tensile strength. Tensile strength represents how much load a chain can withstand under a one-time load before breaking. Just as important as tensile strength is a chain’s fatigue strength. The critical factors in a chain’s fatigue strength is the quality of steel used to manufacture the chain, the heat treatment of the chain components, the quality of the pitch hole fabrication of the linkplates, and the type of shot plus the intensity of shot peen coverage on the linkplates. Other factors can include the thickness of the linkplates and the design (contour) of the linkplates. The rule of thumb for roller chain operating on a continuous drive is for the chain load to not exceed a mere 1/6 or 1/9 of the chain’s tensile strength, depending on the type of master links used (press-fit vs. slip-fit)[citation needed]. Roller chains operating on a continuous drive beyond these thresholds can and typically do fail prematurely via linkplate fatigue failure.

The standard minimum ultimate strength of the ANSI 29.1 steel chain is 12,500 x (pitch, in inches)2. X-ring and O-Ring chains greatly decrease wear by means of internal lubricants, increasing chain life. The internal lubrication is inserted by means of a vacuum when riveting the chain together.

Chain standards

Standards organizations (such as ANSI and ISO) maintain standards for design, dimensions, and interchangeability of transmission chains. For example, the following Table shows data from ANSI standard B29.1-2011 (Precision Power Transmission Roller Chains, Attachments, and Sprockets) developed by the American Society of Mechanical Engineers (ASME). See the references[8][9][10] for additional information.

ASME/ANSI B29.1-2011 Roller Chain Standard SizesSizePitchMaximum Roller DiameterMinimum Ultimate Tensile StrengthMeasuring Load25.

For mnemonic purposes, below is another presentation of key dimensions from the same standard, expressed in fractions of an inch (which was part of the thinking behind the choice of preferred numbers in the ANSI standard):

Notes:
1. The pitch is the distance between roller centers. The width is the distance between the link plates (i.e. slightly more than the roller width to allow for clearance).
2. The right-hand digit of the standard denotes 0 = normal chain, 1 = lightweight chain, 5 = rollerless bushing chain.
3. The left-hand digit denotes the number of eighths of an inch that make up the pitch.
4. An “H” following the standard number denotes heavyweight chain. A hyphenated number following the standard number denotes double-strand (2), triple-strand (3), and so on. Thus 60H-3 denotes number 60 heavyweight triple-strand chain.
 A typical bicycle chain (for derailleur gears) uses narrow 1⁄2-inch-pitch chain. The width of the chain is variable, and does not affect the load capacity. The more sprockets at the rear wheel (historically 3-6, nowadays 7-12 sprockets), the narrower the chain. Chains are sold according to the number of speeds they are designed to work with, for example, “10 speed chain”. Hub gear or single speed bicycles use 1/2″ x 1/8″ chains, where 1/8″ refers to the maximum thickness of a sprocket that can be used with the chain.

Typically chains with parallel shaped links have an even number of links, with each narrow link followed by a broad one. Chains built up with a uniform type of link, narrow at 1 and broad at the other end, can be made with an odd number of links, which can be an advantage to adapt to a special chainwheel-distance; on the other side such a chain tends to be not so strong.

Roller chains made using ISO standard are sometimes called as isochains.
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Q:Why choose us ?
A. we are a manufacturer, we have manufactured valve for over 20 years .
B. Reliable Quality Assurance System;
C. Cutting-Edge Computer-Controlled CNC Machines;
D. Bespoke Solutions from Highly Experienced Specialists;
E. Customization and OEM Available for Specific Application;
F. Extensive Inventory of Spare Parts and Accessories;
G. Well-Developed CHINAMFG Marketing Network;
H. Efficient After-Sale Service System

Q. what is your payment term? 
 A: 30% TT deposit, 70% balance T/T before shipping.

Q:Can we print our logo on your products?
A: yes, we offer OEM/ODM service, we support the customized logo, size, package,etc.

Q: Can you make chains according to my CAD drawings?
A: Yes. Besides the regular standard chains, we produce non-standard and custom-design products to meet the specific technical requirements. In reality, a sizable portion of our production capacity is assigned to make non-standard products.

 
 Q: what is your main market?
A: North America, South America, Eastern Europe, Western Europe, Southeast Asia, Africa, Oceania, Mid East, Eastern Asia,
 
Q: Can I get samples from your factory?
A: Yes, Samples can be provided.

 

 

Standard or Nonstandard: Standard, Standard
Application: Textile Machinery, Garment Machinery, Electric Cars, Motorcycle, Food Machinery, Agricultural Machinery, Textile Machinery, Garment Machinery, Conveyer Equipment, Packaging Machinery, Electric Cars, Motorcycle, Food Machinery, Marine, Mining Equipment, Agricultural Machinery, Car, Food and Beverage Industry, Motorcycle Parts
Surface Treatment: Polishing, Polishing
Structure: Roller Chain, Rotransmission Chain, Pulling Chain, Driving Chain
Material: Stainless Steel, Rubber
Type: Bush Chain, Transmission Chain, Pulling Chain, Driving Chain
Samples:
US$ 0/Meter
1 Meter(Min.Order)

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Customization:
Available

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engineering chain

How do engineering chains handle misalignment between sprockets?

Engineering chains are designed to handle some degree of misalignment between sprockets. Misalignment can occur due to various factors such as improper installation, wear and elongation of the chain, or inaccuracies in the machinery. While some misalignment is inevitable in many industrial applications, excessive misalignment should be avoided to ensure optimal chain performance and longevity.

Here’s how engineering chains handle misalignment:

  1. Flexible Construction: Engineering chains are constructed with flexible components such as pins, rollers, and bushings. This design allows the chain to adapt to minor misalignments without putting excessive stress on the chain or sprockets.
  2. Articulating Joints: The articulating joints in the chain allow it to articulate smoothly around the sprockets, accommodating minor misalignment during the rotation. This helps reduce wear on the chain and sprockets.
  3. Tolerance for Misalignment: Manufacturers provide specifications for the allowable misalignment between sprockets. Engineering chains are designed to handle a certain level of misalignment within these tolerances without significantly affecting their performance.
  4. Proper Installation: Correct installation of the engineering chain is crucial to minimizing misalignment issues. Ensuring proper tension, alignment, and center-to-center distance between sprockets can help reduce misalignment and prolong chain life.
  5. Regular Maintenance: Regular maintenance, including chain inspection and lubrication, can help identify and address misalignment issues early on. Promptly correcting misalignment can prevent further damage and ensure efficient chain operation.
  6. Alignment Devices: In some cases, alignment devices or tools may be used during installation to ensure accurate alignment between the sprockets. These devices can help improve chain performance and reduce wear caused by misalignment.

It is essential to follow the manufacturer’s guidelines for chain installation, maintenance, and alignment to optimize the performance and service life of engineering chains. Addressing misalignment issues promptly and keeping the chain in proper working condition will contribute to the overall reliability and efficiency of the machinery or equipment in which the chain is used.

engineering chain

Can engineering chains be used for power transmission in conveyor systems?

Yes, engineering chains are commonly used for power transmission in conveyor systems. Conveyor systems are widely employed in various industries for material handling, and they require reliable and efficient power transmission methods to move heavy loads over long distances. Engineering chains are well-suited for these applications due to their robust construction, high load-carrying capacity, and versatility.

Conveyor systems often consist of a series of sprockets and a continuous loop of engineering chain that runs over these sprockets. The chain is driven by a motorized sprocket, and as it moves, it carries the conveyed material along the conveyor’s length. The design of engineering chains ensures smooth engagement with the sprockets, enabling efficient power transmission and precise material handling.

Depending on the specific requirements of the conveyor system, various types of engineering chains can be used. For instance, for applications where cleanliness is crucial, stainless steel chains with self-lubricating properties may be employed. In environments with high corrosion potential, corrosion-resistant coatings on chain components can extend the chain’s lifespan.

Furthermore, engineering chains can be customized to fit different conveyor configurations, allowing for the design of complex conveyor systems that suit specific production processes or spatial limitations.

In summary, engineering chains are an excellent choice for power transmission in conveyor systems due to their durability, load capacity, and adaptability. They ensure smooth and reliable operation, making them indispensable in material handling and conveyor applications across various industries.

engineering chain

Can engineering chains be used in corrosive or harsh environments?

Yes, engineering chains can be designed and manufactured to withstand corrosive or harsh environments. When operating in such conditions, it is crucial to select the appropriate materials and coatings for the chain to ensure its durability and performance. Here are some considerations for using engineering chains in corrosive or harsh environments:

1. Material Selection: Choose materials that have high corrosion resistance, such as stainless steel or nickel-plated chains. These materials can withstand exposure to moisture, chemicals, and other corrosive agents.

2. Coatings and Surface Treatments: Applying specialized coatings or surface treatments to the chain can further enhance its corrosion resistance. Common coatings include zinc plating, chromate conversion coating, and polymer coatings.

3. Sealed Joints: Opt for engineering chains with sealed joints or special seals to protect the internal components from contaminants and moisture, reducing the risk of corrosion.

4. Environmental Ratings: Some engineering chains may come with specific environmental ratings that indicate their suitability for certain conditions. Check these ratings to ensure the chain is appropriate for the intended environment.

5. Regular Maintenance: Even with corrosion-resistant materials and coatings, regular maintenance is essential. Keep the chain clean, lubricated, and free from debris to prevent corrosion and premature wear.

6. Compatibility with Other Components: Ensure that all components in the chain system, such as sprockets and bearings, are also suitable for use in corrosive environments.

7. Temperature Considerations: Take into account the operating temperature range of the environment. Some materials may perform differently at extreme temperatures, affecting the chain’s overall performance.

8. Chemical Exposure: If the chain will be exposed to specific chemicals or substances, verify that the chosen materials and coatings are resistant to those chemicals.

By carefully selecting the right materials, coatings, and design features, engineering chains can effectively handle corrosive or harsh environments, maintaining their functionality and longevity in challenging industrial applications.

China OEM Manufacturer 10ass Simplex Stainless Steel Gearbox Belt Transmission Parts Engineering and Construction Machinery Short Pitch Roller Chains and Bush Chain  China OEM Manufacturer 10ass Simplex Stainless Steel Gearbox Belt Transmission Parts Engineering and Construction Machinery Short Pitch Roller Chains and Bush Chain
editor by CX 2023-10-26

China Good quality Heavy Duty Engineering Chains 81X 81xh 81xhh 81xhs Cranked Link Transmission Chains

Product Description

Heavy Duty Engineering Chains 81X 81XH 81XHH 81XHS Cranked link Transmission Chains

Product Description

 

81X chain features a 2.609″ pitch and is categorized as a steel bushed roller chain within the engineer class of chains. Its
commonly referred to as an 81X conveyor chain due to the straight side-bar design and common usage within conveying applications. Most commonly, this chain is found in the lumber and forestry industry and is available with upgrades such as “chrome pins” or heavier-duty side-bars. Our high-strength chain is manufactured to ANSI specifications and dimensionally interchanges with other brands, meaning sprocket replacement is not necessary. We also supply 81X sprockets, attachments, and we have a Made in USA 81X chain breaker. Because of its high-strength and effective design.

 

This chain is found in a wide range of applications including; asphalt paving, car wash, citrus processing, clean grain and return elevators, fertilizer conveying, food processing, forest products, grain handling, manure spreaders, produce wash-down and many more!

 

 

 

Design and Processing Advantages
1. Made of medium carbon steel, the offset sidebar roller chain undergoes processing steps like heating, bending, as well as cold pressing after annealing.
2. The pin hole is created by impact extrusion, which increases the inner surface smoothness for the hole. Thus, the matching area between the sidebar and the pin is increased, and the pins offer higher protection against heavy loads.
3. The integral heat treatment for the chain plates and rollers ensures high tensile strength. The pins additionally undergo
high-frequency induction heating for the surface after integral heat treatment, ensuring high strength, high surface hardness, and wearing resistance as well. The surface carburizing treatment for the bushings or sleeves guarantees high tensile strength, superb surface hardness, and improved impact resistance. These make sure the heavy duty transmission chain has extended service life.

Our range of 81X chain and 81X sprockets covers the most popular styles available worldwide. It is a 2.609 pitch, straight sidebar chain, and ready for immediate delivery to your site.

81X chains are commonly found in the timber industry and used for conveyors, stackers, sorters, trimmer saws, and un-scramblers. Due to their low-cost these chains are found in a wide variety of applications & industries.

The styles of 81X chain that we stock are manufactured from different materials, plate thickness and sidebar heights. This selection enables you to have higher working loads and extend your chains service life.

Our range of 81X chains and sprockets in CHINAMFG are available in different tiers of quality and price. All chains come with CHINAMFG bush and roller, with fully heat-treated components and are manufactured to commercial standards for clearance, fits and limits.

We stock 81X chain in 10-foot rolls and stock a full range of rivets, connector links, attachments, and sprockets.

Product Parameters

 

Chain NO.

 

Pitch

Roller Diamter

 

Width Between inner Plates

Pin Diameter

Pin Length

 

lnner Plate Depth

 

Plate Thick-

-ness

 

Ultimate Tensile Strength

 

Average Tensile Strength

P

d1 max

b1 min

d2 max

L
max

Lc max

h2 max

t/T max

Q
min

mm

mm

mm

mm

mm

mm

mm

mm

kN

81X

66.27

23.00

27.00

11.10

49.0

53.5

28.50

4.00

106.7

81XH

66.27

23.00

27.78

11.10

60.7

65.1

31.35

7.94/5.55

151.9

81XHH

66.27

23.00

27.78

11.10

65.6

70.0

31.35

7.94

191.1

81XHS

66.27

23.00

27.00

11.10

63.6

68.0

31.80

7.60

152.0

Contact us: We care about our valued buyers, if you have any questions, our Customer Service staffs will be very glad to help you. We try our best to reply to your emails as soon as possible, however, due to high volume of daily incoming emails and time zone difference, we may not be able to reply your emails immediately. Please allow 24 business hours for us to response.

Related products

 

Usage: Transmission Chain, Drag Chain, Conveyor Chain, Dedicated Special Chain
Material: Steel
Surface Treatment: Oil Blooming
Feature: Oil Resistant
Chain Size: 1/2"*3/32"
Structure: Roller Chain
Samples:
US$ 9999/Piece
1 Piece(Min.Order)

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engineering chain

Can engineering chains be used for power transmission in automotive applications?

Yes, engineering chains can be used for power transmission in automotive applications. They are commonly employed in various automotive systems that require reliable and efficient power transfer. Here are some automotive applications where engineering chains are used:

  • Timing Chains: In internal combustion engines, timing chains are critical for synchronizing the camshaft and crankshaft’s rotation. They ensure that the engine’s valves open and close at the precise time, optimizing engine performance and fuel efficiency.
  • Drive Chains: Engineering chains are used in automotive drive systems, especially in older vehicles or specific applications where a chain drive is preferred over a belt or gear drive. Drive chains can be found in various components, such as transfer cases, rear-wheel-drive systems, and motorcycle drives.
  • Steering System: In some automotive steering systems, engineering chains are used to transmit the rotational force from the steering wheel to the steering rack or gearbox, enabling vehicle control.
  • Transfer Cases: In four-wheel-drive and all-wheel-drive systems, engineering chains are utilized in transfer cases to distribute power between the front and rear axles, allowing for better traction and handling on various terrains.
  • Suspension Systems: Some automotive suspension systems incorporate engineering chains to support components like torsion bars or assist in adjusting suspension height in certain vehicles.
  • Exhaust System: In exhaust gas recirculation (EGR) systems, engineering chains may be employed to control the flow of exhaust gases, helping to reduce emissions.

It is important to note that while engineering chains are suitable for certain automotive applications, modern vehicles often utilize other methods of power transmission, such as timing belts and gears, due to their quieter operation and reduced maintenance needs. The choice of power transmission method in automotive applications depends on factors like design requirements, space limitations, cost considerations, and desired performance characteristics.

engineering chain

Can engineering chains be used in vertical lifting applications?

Yes, engineering chains can be used in vertical lifting applications, and they are commonly employed in various industries for this purpose. Vertical lifting applications require a reliable and robust power transmission solution, and engineering chains are well-suited to meet these demands.

1. High Load Capacity: Engineering chains are designed to handle heavy loads, making them suitable for vertical lifting applications where substantial weights need to be lifted and moved.

2. Safety Features: Many engineering chains used in lifting applications are designed with safety features, such as chain guides or guards, to prevent the chain from derailing or jumping off the sprockets during operation.

3. Controlled Motion: Engineering chains offer precise control over the lifting motion, which is crucial for vertical lifting tasks that require accuracy and stability.

4. Reliability: In vertical lifting applications, the chain must operate consistently and reliably to ensure the safety of workers and equipment. Engineering chains are known for their durability and long service life, making them a dependable choice for such critical tasks.

5. Customization: Engineering chains can be customized to fit specific vertical lifting applications. Different chain types, sizes, and attachments can be chosen to optimize performance and efficiency for a particular lifting task.

6. Lubrication: Proper lubrication is essential for engineering chains used in vertical lifting applications to minimize friction and wear, ensuring smooth and efficient operation.

7. Compliance: Depending on the industry and application, engineering chains may need to comply with specific safety standards and regulations, such as ISO or ANSI standards.

Overall, engineering chains are a reliable and versatile option for vertical lifting applications, providing the necessary strength, control, and safety required for lifting heavy loads with precision and efficiency.

engineering chain

What are the advantages of using an engineering chain in industrial applications?

Engineering chains offer several advantages that make them highly suitable for a wide range of industrial applications:

  • Robust and Durable: Engineering chains are built to withstand heavy loads, harsh environmental conditions, and abrasive materials commonly found in industrial settings. Their robust construction ensures long-lasting performance and reduces the frequency of replacements, contributing to cost-effectiveness.
  • Versatility: With various types and configurations available, engineering chains are highly versatile. They can be adapted to a wide array of applications, such as material handling, conveyor systems, bucket elevators, and more. Different attachments and accessories further enhance their adaptability for specific tasks.
  • Specialized Variants: The market offers a diverse selection of engineering chains with specialty variants designed for specific industries. Whether it’s mining, agriculture, automotive, or food processing, there is likely an engineering chain optimized for the unique demands of each application.
  • High Load Capacity: Engineering chains are capable of handling heavy loads, making them suitable for heavy machinery, lifting equipment, and other industrial applications requiring substantial power transmission capabilities.
  • Efficient Power Transmission: The design of engineering chains ensures smooth and efficient power transmission, reducing energy losses and improving overall system performance.
  • Attachments and Accessories: Many engineering chains come with pre-installed or customizable attachments that enable them to perform specialized tasks. These attachments can include slats, buckets, rollers, and other components, enhancing their ability to carry, grip, or convey materials as needed.
  • Reliable Performance: Due to their robust design and precise engineering, these chains provide reliable and consistent performance even under challenging conditions, contributing to increased productivity and reduced downtime.
  • Wide Range of Materials: Engineering chains can be manufactured from various materials, including carbon steel, stainless steel, and plastic, allowing for compatibility with different operating environments and industries.
  • Cost-Effective Solutions: Despite their higher initial cost compared to standard roller chains, engineering chains often prove to be cost-effective in the long run due to their extended service life and reduced maintenance needs.

In summary, engineering chains offer durability, versatility, and specialized features that make them an excellent choice for industrial applications where reliable and efficient power transmission is essential. Their ability to handle heavy loads, varied environments, and specific tasks sets them apart as a valuable component in numerous industrial processes.

China Good quality Heavy Duty Engineering Chains 81X 81xh 81xhh 81xhs Cranked Link Transmission Chains  China Good quality Heavy Duty Engineering Chains 81X 81xh 81xhh 81xhs Cranked Link Transmission Chains
editor by CX 2023-10-11

China manufacturer Industrial Engineering Chains for Transmission Escalator

Product Description

We can supply various kinds chains for escalator, any needs please feel free to contact us for more information. 

About Us

With more than 30 years’ experience in machinery industry, Mr.Qian has the factory of his own in 2001.

Since 2006, our factory has developed from a factory that mainly provides machinery processing services to a specialized manufacturer of a series of guide rails for elevators.

We exported from 2008, till now we have exported many countries.

Our factory has passed ISO 9001 certificate. And our guide rails has passed type test in our industry.
      

After several years in this field,now we also can produce and supply some other elevator parts, if they exported with the rails ,the price will be much better. For more information please refer to our website:

       tcxinxing
    

Product Description

Xihu (West Lake) Dis. system; Safety System;Traction System;Electric System;Door System;Cabin and CW parts
Please contact with us for your information.

   

 

Xihu (West Lake) Dis. System Safety System Traction System Electric System
Xihu (West Lake) Dis. rail Light Curtain Rope Attachment elevator fan
Rail clip Safety Gear Wire Rope elevator switch
Bolts Speed Governor Traction Machine Inspection Box
Rail bracket Rope Brake Deflector Sheave Hall Lantern
Xihu (West Lake) Dis. shoes Buffer Anti-vibration Pad Push Button
Compensation Chain     Display
Xihu (West Lake) Dis. Device COP,LOP
  Inverter
Door System ARD
  Elevator Cable
Cabin and CW parts  
 
Escalator parts

 

      

 

Type: Light
Load Capacity: 4500 Persons/H
Use of Occasions: Public Traffic
Speed: 0.5M/S
Slope Angle: 30°
Width of Stair: 800mm
Customization:
Available

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Customized Request

engineering chain

How do engineering chains handle variable speed requirements?

Engineering chains are designed to handle variable speed requirements in power transmission systems. They are capable of accommodating a wide range of speeds without compromising their performance or durability. Here’s how engineering chains handle variable speed conditions:

  • Flexible Design: Engineering chains are constructed with a flexible design that allows them to adapt to changes in speed. The chain’s links and rollers can smoothly engage and disengage with the sprockets, ensuring efficient power transmission even at varying speeds.
  • Smooth Operation: The precision manufacturing of engineering chains ensures smooth and consistent operation across different speed ranges. This smooth operation reduces vibration and noise, minimizing wear and tear on the chain and sprockets.
  • Lubrication: Proper lubrication is essential for engineering chains to handle variable speed conditions. Lubrication reduces friction between the chain’s components, preventing premature wear and enhancing the chain’s ability to operate effectively at different speeds.
  • Load Distribution: Engineering chains distribute the transmitted load evenly across their links, reducing stress concentration points. This load distribution capability enables the chain to handle varying torque and speed requirements without compromising its strength or performance.
  • High-Quality Materials: The use of high-quality materials in engineering chains ensures their ability to withstand the rigors of variable speed applications. High-grade alloy steels or stainless steels are often used to enhance the chain’s strength, durability, and resistance to fatigue.
  • Proper Tensioning: Maintaining the appropriate tension in the engineering chain is crucial for reliable performance at varying speeds. Proper tensioning prevents chain slack and excessive wear, ensuring the chain remains engaged with the sprockets at all times.
  • Variable Pitch Chains: In some applications, engineers may opt for variable pitch chains. These chains have special designs that allow them to accommodate variable speed conditions more effectively.

By considering factors such as chain design, lubrication, load distribution, material quality, and tensioning, engineering chains can smoothly handle variable speed requirements in various industrial applications. Ensuring proper maintenance and selecting the appropriate chain type for the specific application will maximize the chain’s performance and service life.

engineering chain

Can engineering chains be used in food processing or packaging industries?

Yes, engineering chains can be used in food processing and packaging industries under certain conditions. However, several considerations must be taken into account to ensure the safe and hygienic use of engineering chains in such applications.

Key factors to consider when using engineering chains in the food industry include:

  • Food-Grade Materials: Engineering chains intended for use in food processing and packaging must be made from food-grade materials that meet industry standards for cleanliness and hygiene. Stainless steel chains are commonly used in these applications due to their corrosion resistance and ease of cleaning.
  • Design and Construction: The chain design should minimize crevices, pockets, or areas that can trap food particles or contaminants. Smooth surfaces and sealed joints are preferred to facilitate thorough cleaning and prevent bacterial growth.
  • Temperature and Chemical Resistance: Engineering chains should be capable of withstanding the temperature ranges and cleaning agents used in food processing facilities without compromising their performance or integrity.
  • Lubrication: If lubrication is required, food-grade lubricants must be used to avoid contamination of the food products or packaging materials.
  • Cleanability: The chain and its components should be easily accessible for cleaning and sanitation procedures. Quick disassembly and reassembly can also be beneficial for efficient cleaning processes.
  • Regulatory Compliance: Compliance with food safety and sanitation regulations is of utmost importance. Engineering chains used in the food industry should meet industry standards and regulations to ensure product safety.

It’s crucial for food processing and packaging companies to work closely with chain suppliers who understand the specific requirements of the industry and offer chains designed and manufactured to meet these standards. Regular maintenance and inspections are essential to detect any signs of wear, damage, or contamination that could compromise the chain’s suitability for food-related applications.

By adhering to these guidelines and best practices, engineering chains can safely and effectively be used in food processing and packaging industries, contributing to the efficient and reliable operation of conveyor systems and other equipment in these critical sectors.

engineering chain

Can engineering chains be used in corrosive or harsh environments?

Yes, engineering chains can be designed and manufactured to withstand corrosive or harsh environments. When operating in such conditions, it is crucial to select the appropriate materials and coatings for the chain to ensure its durability and performance. Here are some considerations for using engineering chains in corrosive or harsh environments:

1. Material Selection: Choose materials that have high corrosion resistance, such as stainless steel or nickel-plated chains. These materials can withstand exposure to moisture, chemicals, and other corrosive agents.

2. Coatings and Surface Treatments: Applying specialized coatings or surface treatments to the chain can further enhance its corrosion resistance. Common coatings include zinc plating, chromate conversion coating, and polymer coatings.

3. Sealed Joints: Opt for engineering chains with sealed joints or special seals to protect the internal components from contaminants and moisture, reducing the risk of corrosion.

4. Environmental Ratings: Some engineering chains may come with specific environmental ratings that indicate their suitability for certain conditions. Check these ratings to ensure the chain is appropriate for the intended environment.

5. Regular Maintenance: Even with corrosion-resistant materials and coatings, regular maintenance is essential. Keep the chain clean, lubricated, and free from debris to prevent corrosion and premature wear.

6. Compatibility with Other Components: Ensure that all components in the chain system, such as sprockets and bearings, are also suitable for use in corrosive environments.

7. Temperature Considerations: Take into account the operating temperature range of the environment. Some materials may perform differently at extreme temperatures, affecting the chain’s overall performance.

8. Chemical Exposure: If the chain will be exposed to specific chemicals or substances, verify that the chosen materials and coatings are resistant to those chemicals.

By carefully selecting the right materials, coatings, and design features, engineering chains can effectively handle corrosive or harsh environments, maintaining their functionality and longevity in challenging industrial applications.

China manufacturer Industrial Engineering Chains for Transmission Escalator  China manufacturer Industrial Engineering Chains for Transmission Escalator
editor by CX 2023-10-10

China supplier Industrial Transmission Engineering Construction Machinery Conveyor Silent Attachment Chains

Product Description

Our CZPT chain was produced by machinery processing from raw materials to finished products and a full set of quality testing equipment. Mechanical processing equipment include grinding machines, high speed punching machines, milling machines, high speed automatic rolling and assembling machine. Heat treatment was processed by continuous mesh belt conveyor furnace, mesh belt conveyor annealing furnace, advanced central control system of heat treatment, rotary CZPT for chain component heat treatment, which ensure the stability and consistency of the key function of chain components.

We are the best suppliers of Chinese largest palletizing robot enterprises. These items are durable quality with affordable prices, replace of Japan chains, ZheJiang chains exported to Europe, America, Asia and other countries and regions..

 

Model No. 08A-1--48A-1
Usage Transimission chain
Feature Heat treatment
Tensile Strength 1.8kn-3750kn

Chain Pictures

ROLLER CHAIN

Roller chain or bush roller chain is the type of chain drive most commonly used for transmission of mechanical power on many kinds of domestic, industrial and agricultural machinery, including conveyors, wire- and tube-drawing machines, printing presses, cars, motorcycles, and bicycles. It consists of a series of short cylindrical rollers held together by side links. It is driven by a toothed wheel called a sprocket. It is a simple, reliable, and efficient means of power transmission.

CONSTRUCTION OF THE CHAIN

Two different sizes of roller chain, showing construction.
There are 2 types of links alternating in the bush roller chain. The first type is inner links, having 2 inner plates held together by 2 sleeves or bushings CZPT which rotate 2 rollers. Inner links alternate with the second type, the outer links, consisting of 2 outer plates held together by pins passing through the bushings of the inner links. The “bushingless” roller chain is similar in operation though not in construction; instead of separate bushings or sleeves holding the inner plates together, the plate has a tube stamped into it protruding from the hole which serves the same purpose. This has the advantage of removing 1 step in assembly of the chain.

The roller chain design reduces friction compared to simpler designs, resulting in higher efficiency and less wear. The original power transmission chain varieties lacked rollers and bushings, with both the inner and outer plates held by pins which directly contacted the sprocket teeth; however this configuration exhibited extremely rapid wear of both the sprocket teeth, and the plates where they pivoted on the pins. This problem was partially solved by the development of bushed chains, with the pins holding the outer plates passing through bushings or sleeves connecting the inner plates. This distributed the wear over a greater area; however the teeth of the sprockets still wore more rapidly than is desirable, from the sliding friction against the bushings. The addition of rollers surrounding the bushing sleeves of the chain and provided rolling contact with the teeth of the sprockets resulting in excellent resistance to wear of both sprockets and chain as well. There is even very low friction, as long as the chain is sufficiently lubricated. Continuous, clean, lubrication of roller chains is of primary importance for efficient operation as well as correct tensioning.

LUBRICATION

Many driving chains (for example, in factory equipment, or driving a camshaft inside an internal combustion engine) operate in clean environments, and thus the wearing surfaces (that is, the pins and bushings) are safe from precipitation and airborne grit, many even in a sealed environment such as an oil bath. Some roller chains are designed to have o-rings built into the space between the outside link plate and the inside roller link plates. Chain manufacturers began to include this feature in 1971 after the application was invented by Joseph Montano while working for Whitney Chain of Hartford, Connecticut. O-rings were included as a way to improve lubrication to the links of power transmission chains, a service that is vitally important to extending their working life. These rubber fixtures form a barrier that holds factory applied lubricating grease inside the pin and bushing wear areas. Further, the rubber o-rings prevent dirt and other contaminants from entering inside the chain linkages, where such particles would otherwise cause significant wear.[citation needed]

There are also many chains that have to operate in dirty conditions, and for size or operational reasons cannot be sealed. Examples include chains on farm equipment, bicycles, and chain saws. These chains will necessarily have relatively high rates of wear, particularly when the operators are prepared to accept more friction, less efficiency, more noise and more frequent replacement as they neglect lubrication and adjustment.

Many oil-based lubricants attract dirt and other particles, eventually forming an CZPT paste that will compound wear on chains. This problem can be circumvented by use of a “dry” PTFE spray, which forms a solid film after application and repels both particles and moisture.

VARIANTS DESIGN

Layout of a roller chain: 1. Outer plate, 2. Inner plate, 3. Pin, 4. Bushing, 5. Roller
If the chain is not being used for a high wear application (for instance if it is just transmitting motion from a hand-operated lever to a control shaft on a machine, or a sliding door on an oven), then 1 of the simpler types of chain may still be used. Conversely, where extra strength but the smooth drive of a smaller pitch is required, the chain may be “siamesed”; instead of just 2 rows of plates on the outer sides of the chain, there may be 3 (“duplex”), 4 (“triplex”), or more rows of plates running parallel, with bushings and rollers between each adjacent pair, and the same number of rows of teeth running in parallel on the sprockets to match. Timing chains on automotive engines, for example, typically have multiple rows of plates called strands.

Roller chain is made in several sizes, the most common American National Standards Institute (ANSI) standards being 40, 50, 60, and 80. The first digit(s) indicate the pitch of the chain in eighths of an inch, with the last digit being 0 for standard chain, 1 for lightweight chain, and 5 for bushed chain with no rollers. Thus, a chain with half-inch pitch would be a #40 while a #160 sprocket would have teeth spaced 2 inches apart, etc. Metric pitches are expressed in sixteenths of an inch; thus a metric #8 chain (08B-1) would be equivalent to an ANSI #40. Most roller chain is made from plain carbon or alloy steel, but stainless steel is used in food processing machinery or other places where lubrication is a problem, and nylon or brass are occasionally seen for the same reason.

Roller chain is ordinarily hooked up using a master link (also known as a connecting link), which typically has 1 pin held by a horseshoe clip rather than friction fit, allowing it to be inserted or removed with simple tools. Chain with a removable link or pin is also known as cottered chain, which allows the length of the chain to be adjusted. Half links (also known as offsets) are available and are used to increase the length of the chain by a single roller. Riveted roller chain has the master link (also known as a connecting link) “riveted” or mashed on the ends. These pins are made to be durable and are not removable.

USE

An example of 2 ‘ghost’ sprockets tensioning a triplex roller chain system
Roller chains are used in low- to mid-speed drives at around 600 to 800 feet per minute; however, at higher speeds, around 2,000 to 3,000 feet per minute, V-belts are normally used due to wear and noise issues.
A bicycle chain is a form of roller chain. Bicycle chains may have a master link, or may require a chain tool for removal and installation. A similar but larger and thus stronger chain is used on most motorcycles although it is sometimes replaced by either a toothed belt or a shaft drive, which offer lower noise level and fewer maintenance requirements.
The great majority of automobile engines use roller chains to drive the camshaft(s). Very high performance engines often use gear drive, and starting in the early 1960s toothed belts were used by some manufacturers.
Chains are also used in forklifts using hydraulic rams as a pulley to raise and lower the carriage; however, these chains are not considered roller chains, but are classified as lift or leaf chains.
Chainsaw cutting chains superficially resemble roller chains but are more closely related to leaf chains. They are driven by projecting drive links which also serve to locate the chain CZPT the bar.

Sea Harrier FA.2 ZA195 front (cold) vector thrust nozzle – the nozzle is rotated by a chain drive from an air motor
A perhaps unusual use of a pair of motorcycle chains is in the Harrier Jump Jet, where a chain drive from an air motor is used to rotate the movable engine nozzles, allowing them to be pointed downwards for hovering flight, or to the rear for normal CZPT flight, a system known as Thrust vectoring.

WEAR

 

The effect of wear on a roller chain is to increase the pitch (spacing of the links), causing the chain to grow longer. Note that this is due to wear at the pivoting pins and bushes, not from actual stretching of the metal (as does happen to some flexible steel components such as the hand-brake cable of a motor vehicle).

With modern chains it is unusual for a chain (other than that of a bicycle) to wear until it breaks, since a worn chain leads to the rapid onset of wear on the teeth of the sprockets, with ultimate failure being the loss of all the teeth on the sprocket. The sprockets (in particular the smaller of the two) suffer a grinding motion that puts a characteristic hook shape into the driven face of the teeth. (This effect is made worse by a chain improperly tensioned, but is unavoidable no matter what care is taken). The worn teeth (and chain) no longer provides smooth transmission of power and this may become evident from the noise, the vibration or (in car engines using a timing chain) the variation in ignition timing seen with a timing light. Both sprockets and chain should be replaced in these cases, since a new chain on worn sprockets will not last long. However, in less severe cases it may be possible to save the larger of the 2 sprockets, since it is always the smaller 1 that suffers the most wear. Only in very light-weight applications such as a bicycle, or in extreme cases of improper tension, will the chain normally jump off the sprockets.

The lengthening due to wear of a chain is calculated by the following formula:

M = the length of a number of links measured

S = the number of links measured

P = Pitch

In industry, it is usual to monitor the movement of the chain tensioner (whether manual or automatic) or the exact length of a drive chain (one rule of thumb is to replace a roller chain which has elongated 3% on an adjustable drive or 1.5% on a fixed-center drive). A simpler method, particularly suitable for the cycle or motorcycle user, is to attempt to pull the chain away from the larger of the 2 sprockets, whilst ensuring the chain is taut. Any significant movement (e.g. making it possible to see through a gap) probably indicates a chain worn up to and beyond the limit. Sprocket damage will result if the problem is ignored. Sprocket wear cancels this effect, and may mask chain wear.

CHAIN STRENGTH

The most common measure of roller chain’s strength is tensile strength. Tensile strength represents how much load a chain can withstand under a one-time load before breaking. Just as important as tensile strength is a chain’s fatigue strength. The critical factors in a chain’s fatigue strength is the quality of steel used to manufacture the chain, the heat treatment of the chain components, the quality of the pitch hole fabrication of the linkplates, and the type of shot plus the intensity of shot peen coverage on the linkplates. Other factors can include the thickness of the linkplates and the design (contour) of the linkplates. The rule of thumb for roller chain operating on a continuous drive is for the chain load to not exceed a mere 1/6 or 1/9 of the chain’s tensile strength, depending on the type of master links used (press-fit vs. slip-fit)[citation needed]. Roller chains operating on a continuous drive beyond these thresholds can and typically do fail prematurely via linkplate fatigue failure.

The standard minimum ultimate strength of the ANSI 29.1 steel chain is 12,500 x (pitch, in inches)2. X-ring and O-Ring chains greatly decrease wear by means of internal lubricants, increasing chain life. The internal lubrication is inserted by means of a vacuum when riveting the chain together.

CHAIN STHangZhouRDS

Standards organizations (such as ANSI and ISO) maintain standards for design, dimensions, and interchangeability of transmission chains. For example, the following Table shows data from ANSI standard B29.1-2011 (Precision Power Transmission Roller Chains, Attachments, and Sprockets) developed by the American Society of Mechanical Engineers (ASME). See the references[8][9][10] for additional information.

ASME/ANSI B29.1-2011 Roller Chain Standard SizesSizePitchMaximum Roller DiameterMinimum Ultimate Tensile StrengthMeasuring Load25

ASME/ANSI B29.1-2011 Roller Chain Standard Sizes
Size Pitch Maximum Roller Diameter Minimum Ultimate Tensile Strength Measuring Load
25 0.250 in (6.35 mm) 0.130 in (3.30 mm) 780 lb (350 kg) 18 lb (8.2 kg)
35 0.375 in (9.53 mm) 0.200 in (5.08 mm) 1,760 lb (800 kg) 18 lb (8.2 kg)
41 0.500 in (12.70 mm) 0.306 in (7.77 mm) 1,500 lb (680 kg) 18 lb (8.2 kg)
40 0.500 in (12.70 mm) 0.312 in (7.92 mm) 3,125 lb (1,417 kg) 31 lb (14 kg)
50 0.625 in (15.88 mm) 0.400 in (10.16 mm) 4,880 lb (2,210 kg) 49 lb (22 kg)
60 0.750 in (19.05 mm) 0.469 in (11.91 mm) 7,030 lb (3,190 kg) 70 lb (32 kg)
80 1.000 in (25.40 mm) 0.625 in (15.88 mm) 12,500 lb (5,700 kg) 125 lb (57 kg)
100 1.250 in (31.75 mm) 0.750 in (19.05 mm) 19,531 lb (8,859 kg) 195 lb (88 kg)
120 1.500 in (38.10 mm) 0.875 in (22.23 mm) 28,125 lb (12,757 kg) 281 lb (127 kg)
140 1.750 in (44.45 mm) 1.000 in (25.40 mm) 38,280 lb (17,360 kg) 383 lb (174 kg)
160 2.000 in (50.80 mm) 1.125 in (28.58 mm) 50,000 lb (23,000 kg) 500 lb (230 kg)
180 2.250 in (57.15 mm) 1.460 in (37.08 mm) 63,280 lb (28,700 kg) 633 lb (287 kg)
200 2.500 in (63.50 mm) 1.562 in (39.67 mm) 78,175 lb (35,460 kg) 781 lb (354 kg)
240 3.000 in (76.20 mm) 1.875 in (47.63 mm) 112,500 lb (51,000 kg) 1,000 lb (450 kg

For mnemonic purposes, below is another presentation of key dimensions from the same standard, expressed in fractions of an inch (which was part of the thinking behind the choice of preferred numbers in the ANSI standard):

Pitch (inches) Pitch expressed
in eighths
ANSI standard
chain number
Width (inches)
14 28 25 18
38 38 35 316
12 48 41 14
12 48 40 516
58 58 50 38
34 68 60 12
1 88 80 58

Notes:
1. The pitch is the distance between roller centers. The width is the distance between the link plates (i.e. slightly more than the roller width to allow for clearance).
2. The right-hand digit of the standard denotes 0 = normal chain, 1 = lightweight chain, 5 = rollerless bushing chain.
3. The left-hand digit denotes the number of eighths of an inch that make up the pitch.
4. An “H” following the standard number denotes heavyweight chain. A hyphenated number following the standard number denotes double-strand (2), triple-strand (3), and so on. Thus 60H-3 denotes number 60 heavyweight triple-strand chain.
 A typical bicycle chain (for derailleur gears) uses narrow 1⁄2-inch-pitch chain. The width of the chain is variable, and does not affect the load capacity. The more sprockets at the rear wheel (historically 3-6, nowadays 7-12 sprockets), the narrower the chain. Chains are sold according to the number of speeds they are designed to work with, for example, “10 speed chain”. Hub gear or single speed bicycles use 1/2″ x 1/8″ chains, where 1/8″ refers to the maximum thickness of a sprocket that can be used with the chain.

Typically chains with parallel shaped links have an even number of links, with each narrow link followed by a broad one. Chains built up with a uniform type of link, narrow at 1 and broad at the other end, can be made with an odd number of links, which can be an advantage to adapt to a special chainwheel-distance; on the other side such a chain tends to be not so strong.

Roller chains made using ISO standard are sometimes called as isochains.

 

WHY CHOOSE US 

1. Reliable Quality Assurance System
2. Cutting-Edge Computer-Controlled CNC Machines
3. Bespoke Solutions from Highly Experienced Specialists
4. Customization and OEM Available for Specific Application
5. Extensive Inventory of Spare Parts and Accessories
6. Well-Developed CZPT Marketing Network
7. Efficient After-Sale Service System

 

The 219 sets of advanced automatic production equipment provide guarantees for high product quality. The 167 engineers and technicians with senior professional titles can design and develop products to meet the exact demands of customers, and OEM customizations are also available with us. Our sound global service network can provide customers with timely after-sales technical services.

We are not just a manufacturer and supplier, but also an industry consultant. We work pro-actively with you to offer expert advice and product recommendations in order to end up with a most cost effective product available for your specific application. The clients we serve CZPT range from end users to distributors and OEMs. Our OEM replacements can be substituted wherever necessary and suitable for both repair and new assemblies.

 

 

Shipping Cost:

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To be negotiated
Standard or Nonstandard: Standard
Application: Textile Machinery, Garment Machinery, Conveyer Equipment, Packaging Machinery, Electric Cars, Motorcycle, Food Machinery, Marine, Mining Equipment, Agricultural Machinery, Car
Surface Treatment: Polishing, Oil Blooming
Samples:
US$ 0/Piece
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Customization:
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engineering chain

How do engineering chains compare to other types of chains in terms of efficiency?

Engineering chains are known for their high efficiency in power transmission compared to some other types of chains. Their efficiency can be attributed to several factors:

  • Minimal Friction: Engineering chains are designed with precision rollers and bushings, which reduces friction between the chain’s components. This results in less energy loss during power transmission.
  • High-Quality Materials: These chains are typically made from high-quality materials, such as alloy steel, which ensures durability and minimal elongation under heavy loads. This material choice helps maintain efficiency over extended periods of use.
  • Precise Manufacturing: Engineering chains are manufactured with tight tolerances and precise engineering, ensuring consistent performance and smooth operation. This precision minimizes energy losses due to chain misalignment or uneven loading.
  • Optimized Design: The design of engineering chains takes into account the specific requirements of power transmission, making them well-suited for their intended applications. This optimized design contributes to their overall efficiency.
  • Proper Lubrication: Regular and proper lubrication of engineering chains is essential to maintain their efficiency. Adequate lubrication reduces friction and wear, optimizing power transfer efficiency.

Compared to some other types of chains, such as standard roller chains, engineering chains may offer higher efficiency due to their advanced design and manufacturing processes. However, the choice of chain type depends on the specific application requirements, load conditions, operating environment, and other factors.

In certain applications, other power transmission methods like belts or gears might be preferred over chains, based on factors such as noise level, space constraints, and maintenance considerations. Each power transmission method has its advantages and limitations, and selecting the most suitable option requires careful consideration of the application’s needs.

engineering chain

How do engineering chains handle product accumulation and spacing in conveyor systems?

In conveyor systems, product accumulation and spacing are essential considerations to ensure smooth and efficient material handling. Engineering chains play a crucial role in managing product flow and maintaining proper spacing between items. Here’s how they handle these tasks:

1. Accumulation: Engineering chains can be designed with special attachments that allow for product accumulation. These attachments create zones on the conveyor where products can accumulate without interrupting the overall conveyor operation. The accumulation zones are usually equipped with sensors or photo eyes to detect product presence and control the chain’s movement, preventing collisions and jams.

2. Spacing: To achieve proper spacing between products on the conveyor, engineering chains may be equipped with specially designed attachments or guides. These guides ensure that each item is evenly spaced from the one in front of it, preventing product collisions and maintaining a consistent flow. The spacing between products can be adjusted by modifying the length of the conveyor or changing the attachment configuration on the chain.

3. Timing and Synchronization: In automated conveyor systems, engineering chains are often used to synchronize the movement of products. Through precise control and positioning, the chain ensures that items are released at the correct intervals, maintaining the desired spacing and preventing congestion.

4. Low Back Pressure: Engineering chains can be designed with low back pressure accumulation, which allows products to accumulate while maintaining gentle contact with each other. This reduces the risk of damage to delicate or sensitive items and improves overall product handling.

5. Diverter and Merge Solutions: Engineering chains can incorporate diverters and merge units to redirect products to different conveyor lines while maintaining proper spacing. These units efficiently manage product flow and distribution in complex conveyor systems.

6. Customization: Manufacturers can customize engineering chains to suit specific product sizes, weights, and handling requirements. This ensures optimal performance and reduces the risk of jams or disruptions in the conveyor system.

Overall, engineering chains are integral components in conveyor systems, enabling effective product accumulation and spacing. Their precise control, customizability, and synchronization capabilities contribute to the smooth and efficient operation of material handling processes in various industries.

engineering chain

How do you select the right size and pitch for an engineering chain?

Choosing the correct size and pitch for an engineering chain is essential to ensure optimal performance, longevity, and safety in industrial applications. Here are the steps to guide you in selecting the right engineering chain size and pitch:

1. Identify the Application Requirements: Understand the specific requirements of the application where the engineering chain will be used. Consider factors such as the load to be carried, the speed of operation, the environmental conditions, and any special considerations like corrosion resistance or high-temperature requirements.

2. Determine the Chain Type: Engineering chains come in various types, such as roller chains, conveyor chains, drive chains, and specialty chains. Choose the chain type that best matches the intended application and the type of motion required.

3. Calculate the Chain Pitch: The chain pitch refers to the distance between each roller pin or attachment point on the chain. To calculate the chain pitch, measure the center-to-center distance of any three consecutive pins and divide it by two. Ensure that the calculated pitch matches the chain’s specified pitch.

4. Calculate the Chain Length: Determine the required length of the engineering chain by considering the distance between the sprockets and any additional slack or tension needed for smooth operation. Ensure that the selected chain length is appropriate for the application and fits well without being overly tight or loose.

5. Check Load Capacity and Strength: Refer to the manufacturer’s data or engineering chain catalog to determine the load capacity and strength of the selected chain. Ensure that the chain’s load capacity exceeds the maximum loads expected in the application to prevent premature wear or failure.

6. Consider the Environmental Factors: Take into account any environmental factors that may affect the performance of the engineering chain, such as temperature, moisture, chemicals, or abrasive materials. Choose a chain material that can withstand the specific environmental conditions to ensure longevity.

7. Consult with Manufacturers or Suppliers: If you are uncertain about selecting the right engineering chain, do not hesitate to consult with chain manufacturers or suppliers. They can provide valuable insights and recommendations based on their expertise and knowledge of various applications.

By following these steps and carefully evaluating the application’s requirements, you can select the appropriate size and pitch for an engineering chain, ensuring reliable and efficient operation in your specific industrial setting.

China supplier Industrial Transmission Engineering Construction Machinery Conveyor Silent Attachment Chains  China supplier Industrial Transmission Engineering Construction Machinery Conveyor Silent Attachment Chains
editor by CX 2023-08-09

China Slat Top Transmission Chains Lf820-K375 Materials POM Brown White Color manufacturer

Solution Description

The main application is for conveying different meals products and containers.
The 820 is a plastic version of the associated. The plastic chains even so have a reinforcing center rib underneath. The website link thickness is 4. mm (.sixteen in.) for the 820-sequence. The links overlap, so there is no space amongst the links.
Plate mat.:POM/PP Pin mat.:stainless steel
Max.pace: 80m/min lubrication 50m/min dry
Max.duration:12m Color:white/brown Packing unit:10ft(80links)
 
Purposes:
China Zhiyue Machinery Co.,Ltd is a particular provider of conveyor technique parts,such as plastic and stainless metal flat prime chains, Modular belts, other spare areas, these kinds of as UHMWPE wearstrips, side guards, chains guide, bipods, tripods, brackets, clampls.ect.
With our years of experence, top quality items, excellent services we perform with planet extensive clientele from The us, Europe, Africa, numerous counrties of Asia. We preserve really great enterprise relation with them, and get trustworthy from them.
Our items software:

Packaging and conveying industry
Beverage bottling and dealing with market
Meals and meat processing market
Chemical business
Pharmaceuticals industry
Auto industry
Electrical and electronics business
Textile business
Gentle engineering sector
 

US $5
/ Meter
|
100 Meters

(Min. Order)

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Material: Plastic
Structure: Top Chain
Surface Treatment: Low Friction
Chain Size: Pitch 38.1mm
Color: Brown/White/Others
Materials: POM/PP/PE

###

Samples:
US$ 6/Meter
1 Meter(Min.Order)

|
Request Sample

###

Slat Top Transmission Chains Lf820-K375 Materials POM Brown White Color
Slat Top Transmission Chains Lf820-K375 Materials POM Brown White Color
Slat Top Transmission Chains Lf820-K375 Materials POM Brown White Color
The main application is for conveying various food products and containers.
The 820 is a plastic version of the related. The plastic chains however have a reinforcing middle rib underneath. The link thickness is 4.0 mm (0.16 in.) for the 820-series. The links overlap, so there is no space between the links.
Plate mat.:POM/PP; Pin mat.:stainless steel
Max.speed: 80m/min lubrication; 50m/min dry
Max.length:12m; Color:white/brown; Packing unit:10ft(80links)
 
APPLICATIONS:
Slat Top Transmission Chains Lf820-K375 Materials POM Brown White Color
China Zhiyue Machinery Co.,Ltd is a special supplier of conveyor system components,including plastic and stainless steel flat top chains, Modular belts, other spare parts, such as UHMWPE wearstrips, side guards, chains guide, bipods, tripods, brackets, clampls.ect.
With our years of experence, quality products, excellent services we work with world wide clients from America, Europe, Africa, many counrties of Asia. We keep very good business relation with them, and get trusted from them.
Our products application:

Packaging and conveying industry
Beverage bottling and handling industry
Food and meat processing industry
Chemical industry
Pharmaceuticals industry
Automobile industry
Electrical and electronics industry
Textile industry
Light engineering industry
 

US $5
/ Meter
|
100 Meters

(Min. Order)

###

Material: Plastic
Structure: Top Chain
Surface Treatment: Low Friction
Chain Size: Pitch 38.1mm
Color: Brown/White/Others
Materials: POM/PP/PE

###

Samples:
US$ 6/Meter
1 Meter(Min.Order)

|
Request Sample

###

Slat Top Transmission Chains Lf820-K375 Materials POM Brown White Color
Slat Top Transmission Chains Lf820-K375 Materials POM Brown White Color
Slat Top Transmission Chains Lf820-K375 Materials POM Brown White Color
The main application is for conveying various food products and containers.
The 820 is a plastic version of the related. The plastic chains however have a reinforcing middle rib underneath. The link thickness is 4.0 mm (0.16 in.) for the 820-series. The links overlap, so there is no space between the links.
Plate mat.:POM/PP; Pin mat.:stainless steel
Max.speed: 80m/min lubrication; 50m/min dry
Max.length:12m; Color:white/brown; Packing unit:10ft(80links)
 
APPLICATIONS:
Slat Top Transmission Chains Lf820-K375 Materials POM Brown White Color
China Zhiyue Machinery Co.,Ltd is a special supplier of conveyor system components,including plastic and stainless steel flat top chains, Modular belts, other spare parts, such as UHMWPE wearstrips, side guards, chains guide, bipods, tripods, brackets, clampls.ect.
With our years of experence, quality products, excellent services we work with world wide clients from America, Europe, Africa, many counrties of Asia. We keep very good business relation with them, and get trusted from them.
Our products application:

Packaging and conveying industry
Beverage bottling and handling industry
Food and meat processing industry
Chemical industry
Pharmaceuticals industry
Automobile industry
Electrical and electronics industry
Textile industry
Light engineering industry
 

Roller Chain Basics

Before choosing the right roller chain for your machine, it is necessary to learn some basics. Learn about sprockets, tensile strength, pitch, and width. Read this article to learn more. It will help you make an informed decision. Getting the right product is critical, but it’s not always as simple as choosing a brand name. You need to choose a company that supports its products and provides good service.
chain

Roller sprocket

If you are planning to purchase roller sprockets for your application, you should first look at the various types available. Sprockets available for single-strand roller chains are manufactured by Boston Steel – Type B sprockets are drilled to size. They are available in 1/4, 3/8, 1/2, 5/8, 3/4 and 1″ pitch sizes.
The diameter of the sprocket is important when choosing the right sprocket for your application. Using a caliper to measure the diameter of a toothless plate is a good way to determine the exact size of the sprocket. A caliper is the diameter of a plate without teeth. On Type B and C sprockets, the hub diameter measures the thickness of the hub.
Another type of sprocket is the steel split sprocket, which is split in diameter. This type is easy to install and remove, and is held together by bolts in the hub. Typically, split sprockets have chain pitches ranging from 40 to 240 and bores ranging from 3/4″ to 6″. The split sprockets are designed with one pointing towards the ceiling and the other two parallel to the floor.
When shopping for sprockets, it is important to remember that they are designed specifically for a specific chain. All chains are manufactured to specific standards. In the United States, the most common standard is ANSI. The chain pitch is the distance between the center of each pin and the center of the next pin. In the US, the standard is always measured in eight-inch intervals.
In addition to sprocket size, sprocket pitch and the surface area also affect chain life. Unlike belt sprockets, which are made of forged steel, the teeth on roller sprockets are stamped from steel sheet or pressed from powdered metal. The harder the teeth, the longer the chain will last.

Roller chain pitch

The pitch of a roller chain is the distance between the sprocket and the pin. The smaller the thread pitch, the smaller the bushing wear. Generally speaking, the smaller the pitch, the longer the life of the chain. For best performance and longest life, manufacturers recommend a minimum chain pitch of 2% to 3%. Chain pitch is important to ensure proper performance, and the manufacturer recommends that you replace the chain when it reaches 2% to 3% of normal.
To determine the correct chain pitch for a particular chain, first determine the sprocket size and pitch. Pitch is the distance between pin centers, measured in 1/8 inch increments. The pin diameter of the chain is also important. If you’re not sure about the pin diameter of your chain, measure a few links to get a good average reading. Alternatively, use a caliper to measure the inside diameter of the sprocket and count the number of teeth.
When sizing a sprocket, measure the chain between the gears with a caliper and compare it to the measurements on the chain size chart. Make sure you have checked all the specs and checked the correct chain pitch. Then, choose the correct chain pitch for your needs. This is a critical step in choosing the right chain. So get the correct pitch for your roller chain. Correct pitch helps ensure maximum performance and safety.
To identify a specific type of roller chain, measure its tensile strength. This represents the amount of load the chain can withstand before breaking. Another key parameter to consider is fatigue strength. Chains with high fatigue strength are more resistant to rust and wear than chains with low fatigue strength. The numbers on the right in the standard numbering represent normal or light duty chains, while the numbers on the left represent the pitch of heavy-duty chains.
Double pitch roller chains are a variant of single pitch chains. They are manufactured according to ISO 606 and meet the same standards as single pitch chains. They are mainly used in applications with lower requirements for speed and power transmission. The plates of double pitch roller chains are also longer than single pitch chains. The double pitch drive series is also used for elevator and long conveyor drives. There are three main types of roller chains: single-pitch chains, double-pitch carriers, and oversized rollers.

Roller chain width

When buying a roller chain, one of the first decisions you must make is its width. To make this determination, you need to measure the overall width of the chain, the diameter, and the width of each roller. You must also know the height and thickness of the board. After taking these measurements, you can start shopping for the perfect roller chain. But before you buy a new chain, it’s important to know what to expect from the chain itself.
There are many different types of roller chains. These chains are available for ANSI and metric measurements. They come in single-stranded and double-stranded variants. They are usually used for power transmission. Other types include agricultural, automotive, conveyor, multi-strand, and four-strand chains. These charts also include a chart so you can easily see the exact size you need. Listed below are some of the benefits of buying a roller chain.
Roller diameter and pin diameter are important factors in choosing the correct chain width. The width of the chain is the nearest binary fraction of 5/8 of an inch. It should be at least half the thickness of the sprocket, and the plate thickness is one-eighth the width of the chain. Overweight chains are indicated with the suffix H. The pitch and width of the chain are determined by the working load and machine speed.
The outer links of the roller chain are called pin links. These pins are inserted into the bushings of the adjacent roller links. They are held in place by cotter pins. Pin links are usually pressed into the pins of heavy-duty chains. These pins are used to hold the rollers in place. However, these pin chains can reduce the power rating of roller chains by up to 20%.
The ANSI 29.1 Steel Chain Specification specifies a minimum pitch in inches and ultimate strength of 12,500 x pitch in inches. At the same time, the O-ring chain greatly reduces wear due to its lubricating effect. O-ring and X-ring chains contain a lubricant injected by vacuum when riveting the chain together. Transmission chains are tested and governed by standards bodies such as ANSI. In 2011, the American Society of Mechanical Engineers developed a standard for precision power transmission chains.
chain

Roller chain tensile strength

One of the most important indicators of roller chain strength is tensile strength. This measurement refers to the amount of load the chain can withstand before breaking. Another measure, called fatigue strength, refers to the maximum load a chain can withstand before it breaks. The strength of a roller chain depends on its size, the quality of the steel used in its construction, and the heat treatment. There are also differences in the types of shot peening used to treat steel, pitch holes, and link plates.
When choosing a roller chain, the workload is critical. This is the maximum load the chain can withstand before fatigue failure occurs. This measurement is critical because it helps determine the type of load applied to the chain. When deciding which roller chain to buy, be sure to consider the mechanical type and desired strength. Then, make sure it meets strength and load-carrying capacity requirements.
The ultimate tensile strength of a roller chain is based on the manufacturer’s recommended maximum tensile strength. However, the actual tensile strength may be higher or lower than this value. The working load limit of a roller chain can also be calculated by multiplying the chain diameter by the grade. The working load limit of a chain is the highest tension it can withstand before breaking. This value is usually expressed in points.
The maximum tensile strength of roller chains varies by chain type. The single-strand heavy chain has thick side plates for higher shock loads. Single strand heavy-duty roller chains, also known as “bushing” roller chains, are also available. Double-stranded heavy chains are structurally similar, but they have two layers of steel connected by pins that are nearly twice as strong as standard roller chains.
The tensile strength of a single-strand roller chain is approximately 500 tons. In comparison, a single-chain blockchain has a tensile strength of 900. The tensile strength of the two is similar, and it is not recommended to choose one or the other. Although steel and titanium chains are considered the strongest materials for roller chains, these materials are not magnetic.

China Slat Top Transmission Chains Lf820-K375 Materials POM Brown White Color     manufacturer China Slat Top Transmission Chains Lf820-K375 Materials POM Brown White Color     manufacturer
editor by czh 2023-01-29

China OEM Heavy Duty Engineering Chains 81X 81xh 81xhh 81xhs Cranked Link Transmission Chains with Best Sales

Merchandise Description

Large Duty Engineering Chains 81X 81XH 81XHH 81XHS Cranked url Transmission Chains

81X chain features a 2.609″ pitch and is categorized as a metal bushed roller chain inside of the engineer course of chains. Its
commonly referred to as an 81X conveyor chain because of to the straight side-bar design and style and widespread usage within conveying applications. Most typically, this chain is identified in the lumber and forestry sector and is offered with upgrades this kind of as “chrome pins” or heavier-responsibility side-bars. Our high-energy chain is created to ANSI technical specs and dimensionally interchanges with other manufacturers, which means sprocket alternative is not required. We also offer 81X sprockets, attachments, and we have a Produced in Usa 81X chain breaker. Due to the fact of its higher-power and effective design.

 

This chain is identified in a vast selection of applications like asphalt paving, vehicle clean, citrus processing, clear CZPT and return elevators, fertilizer conveying, meals processing, forest merchandise, CZPT managing, manure spreaders, produce clean-down and many far more!

 

 

 

Design and style and Processing Positive aspects
1. Manufactured of medium carbon steel, the offset sidebar roller chain undergoes processing measures like heating, bending, as effectively as cold urgent right after annealing.
two. The pin gap is CZPT by effect extrusion, which boosts the interior area smoothness for the gap. Hence, the matching region in between the sidebar and the pin is increased, and the pins provide larger protection from weighty loads.
three. The integral warmth remedy for the chain plates and rollers guarantees substantial tensile energy. The pins additionally endure
higher-frequency induction heating for the floor soon after integral warmth therapy, ensuring high energy, large surface hardness, and sporting resistance as effectively. The surface area carburizing remedy for the bushings or sleeves ensures higher tensile energy, excellent surface area hardness, and enhanced affect resistance. These make positive the large obligation transmission chain has prolonged provider daily life.

Our assortment of 81X chain and 81X sprockets covers the most well-liked styles available globally. It is a 2.609 pitch, straight sidebar chain, and prepared for fast supply to your site.

81X chains are typically identified in the timber business and used for conveyors, stackers, sorters, trimmer saws, and un-scramblers. Because of to their lower-cost these chains are located in a vast assortment of programs & industries.

The variations of 81X chain that we stock are manufactured from various resources, plate thickness and sidebar heights. This variety enables you to have greater functioning masses and increase your chains services lifestyle.

Our range of 81X chains and sprockets in ever-electrical power are offered in different tiers of good quality and cost. All chains appear with solid bush and roller, with entirely heat-dealt with elements and are produced to business requirements for clearance, fits and limits.

We stock 81X chain in ten-foot rolls and inventory a complete assortment of rivets, connector backlinks, attachments, and sprockets.

Chain NO.

 

Pitch

Roller Diamter

 

Width In between inner Plates

Pin Diameter

Pin Size

 

lnner Plate Depth

 

Plate Thick-

-ness

 

Greatest Tensile Toughness

 

Typical Tensile Strength

P

d1 max

b1 min

d2 max

L
max

Lc max

h2 max

t/T max

Q
min

mm

mm

mm

mm

mm

mm

mm

mm

kN

81X

sixty six.27

23.00

27.00

11.10

forty nine.

fifty three.5

28.fifty

four.00

106.seven

81XH

sixty six.27

23.00

27.78

eleven.10

60.seven

65.one

31.35

7.94/5.55

151.9

81XHH

66.27

23.00

27.seventy eight

11.ten

65.six

70.

31.35

seven.ninety four

191.1

81XHS

66.27

23.00

27.00

11.ten

63.6

sixty eight.

31.80

7.sixty

152.

Make contact with us: We treatment about our valued consumers, if you have any queries, our Consumer Support staffs will be extremely happy to assist you. We try out our greatest to reply to your e-mails as before long as possible, nevertheless, because of to higher quantity of every day incoming e-mails and time zone variation, we may possibly not be in a position to reply your emails quickly. Remember to enable 24 company hours for us to response.

Relevant products

 

Regardless of whether you are creating from scratch or updating an present project, obtaining the appropriate dimensions for your roller chain is a essential initial determination. To correctly measure a roller chain, you require to know the all round width, diameter, and width of the rollers, plate thickness, and height.
Right here are some advantages of chain drives more than belt and gear drives: They can be used for lengthy and limited distances. A number of axles, are pushed by chains. They are compact and have a small overall measurement, so even in the event of a fireplace, you won’t expertise any bad troubles. Temperature and ambient problems do not influence its procedure. Chain drives do not demand initial tension. They are quite efficient (up to ninety six%) and have no slip and creep throughout transmission, making certain a ideal gear ratio. Chain travel, straightforward to put in. Chain drives are minimal upkeep, withstand abrasive conditions and operate in soaked circumstances

China OEM Heavy Duty Engineering Chains 81X 81xh 81xhh 81xhs Cranked Link Transmission Chains     with Best Sales