P78f2K2 ISO and ANSI Standard Driving Conveyor Chains with Attachments
Rizhao City Sanxing Chemicals Co., Ltd.- 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
- Structure：Combined Chain
- Material：Alloy
- Type：Customized Conveyor Chain
Base Info
- Model NO.：Conveyor Chains
- Transport Package：According to Client Requests
- Specification：Customized
- Trademark：SMCC
- Origin：China
- HS Code：7315119000
- Production Capacity：700000meters Per Year
Description
d5 mmLmax mm Lcmax mm P13.7K1 13.7 8.51 7.75 4.45 16.7 19.3 17.8/4000 20 0.79 △ 9.5 29 38.7 7.1 11.8 4.5 1.6 - P14.85K1 14.85 10.16 9.4 5.08 20.7 23.3 20.0/4496 22 1.34 △ 14.85 30 38 10 14.5 3.5 2.03 - P16.7F1K1 16.7 10.16 9.4 5.08 20.7 23.3 21.8/4900 24 1.5 △ 12.7 31.8 44.6 10.3 14.6 5.2 2.03 - *P28 28.575 11.68 16 7.87 - 32.4 50.0/11240 55 2.66 28.58 51 46.74 61.2 13.7 22.23 8.75 3.1 - *P28F1 28.575 11.68 16.13 7.87 - 32.4 50.0/11240 55 2.6 28.58 50.8 46.8 61.86 12.7 22.23 9.02 3.1 - P36.67A2 36.67 11.91 12.57 5.94 25.9 28.3 31.8/7149 34.98 1.26 14.3 28.6 42.9 67.8 14.7 18 5.5 2.42 - P38F10K1 38 15.88 13 8.28 32.5 35.5 55.0/12364 60.5 2.6 △ 30 49 79 16.5 21 8.4 3.5 - P38F11Kl 38 15.88 13 8.28 30.5 33.5 45.0/10116 49.5 2.3 △ 30 47 77 16.5 21 8.4 3 - P38F13K1 38 15.88 13 8.28 32.5 35.5 55.0/12364 60.5 2.6 △ 30 49 79 16.5 16.5 7 3.5 - P38.1F2 38.1 22.5 13 8 29.5 33.3 40.0/8992 44 2.42 △ 28 56 76 17.2 19 9 3 - P38.1F25A1 38.1 18 15 8.28 36.1 39.1 68.0/15287 75 3 △ 28 51 71 15 21 8.4 4 - P38.1F25A2 38.1 23.8 15 8.28 36.1 39.1 68.0/15286 74.8 3.38 50 70 48 68 15 21 7 4 - P38.1F31 38.1 15.88 15.75 7.92 36.2 38.9 55.0/12364 60.5 3.46 △ 61.1 54.2 81.6 14.7 23 8.2 4 - P38.1F32 38.1 15.88 15.75 7.92 36.2 38.9 55.0/12364 60.5 3.38 △ 61.1 61 81.6 14.7 23 10.2 4 - P39.75A1 39.75 17.25 22 7.8 40.5 44.3 47.0/10566 51.7 3.1 △ 61 62.1 94.1 16.5 21.25 11×8 3.5 - P39.75A2F2 39.75 22.23 13 5.94 29.2 31 32.0/7194 35.2 2.23 14.3 28.6 42.4 57.2 14.7 17 5.2 3.1 - P40F12A2 40 22.23 13 5.94 29.2 31 32.0/7194 35.2 2.23 14.3 28.6 42.9 57.2 14.7 17 5.2 3.1 - P41.3F9A2 41.3 22 11 9 28.6 31.6 40.0/8992 44 2.3 12 24 36.2 48.2 17 21 5.5 3 - P41.3F14A2 41.275 22.22 12.7 5.94 29.2 31.6 30.0/6744 33 2.22 14.3 28.6 42.9 61.2 14.7 17.5 5.2 3.25 - P42F2 42 11 13 6 30 32.5 50.0/11240 55 1.85 △ 35 40 76 12.8 17 6 3 - P42F13A1 42.01 22.23 25.4 9.53 48.5 - 55.0/12364 60.5 4.6 △ 31.75 60 84.2 18 28.58 8.26×16 3.25 - P42.5 42.5 15.88 15.75 7.92 32.7 36.5 56.7/12746 62 3.4 19 38 53.5 70 19.5 22 7 3.25 - P44F3A2 44 15.88 17.02 8.28 36.1 39.1 60.0/13488 66 2.32 26 44 50.8 68 19.1 21 6.6 4.15/3.10 - P44.45F5 44.45 25.4 16.51 7.92 36.2 38.9 35.0/7874 38.5 3.85 △ 34.93 57.16 74.46 19.05 19.05 8 3.8 - P44.45F7A1 44.45 28.58 15 9.53 34.5 38.7 45.0/10116 49.5 3.8 △ 22 66 84.8 12.8 25.6 7 3 - P44.45F12K2 44.45 25.4 25.4 12.7 54.4 59 170.0/38216 187 7.84 42 82 69 97.3 25 36.8 10.8 6.00/5.00 - P44.45F15K2 44.45 25.4 25.4 12.7 60 - 170.0/38216 187 8.34 42 82 69 97.3 25 36.8 10.8 6.00/5.00 - P46 46 16 16 8 36 39 55.0/12364 60.5 3.23 △ 38 54 82.8 18 22 6 4 - P49F2A1 49 31 23 9.8 36.6 42 40.0/8992 44 5.51 △ 45 62 86 35 25 10 4 - P50F3A1 50 31 15 9.53 35.4 38.65 83.0/18659 91.3 4.77 △ 60 63 98 19.1 25 10 4 - P50F16 50 24.9 10.07 7.8 26.6 28.8 30.0/7418 36.3 2.22 △ 41.3 45 61.4 36 20 6.5 3 - P50F27A1 50 31 15 9.8 36.6 42 40.0/8992 44 5.3 △ 45 62 86 35 25 10 4 - P50F42A1 50 29 15 9.8 36.6 42 40.0/8992 44 4.03 △ 29 55 72 12.5 25 7 4 - P50F53A2 50 31 15.5 10 37.1 40 40.0/8992 44 4 20 40 58.4 74.4 21 25 8.2 4 - P50.8F22A1-F 50.8 32 15 11.7 39 43 50.0/11240 55 6.13 △ 45 75 110.4 20 26.4 9 4.5 40 P50.8F35A1 50.8 25 12.57 5.94 25.9 29 31.8/7150 35 2.2 △ 48 46 68 26 18 8 2.5 - P50.8F40 50.8 28.6 30.6 10.19 57 62 70.0/15736 77 7.55 - 40 - 90 22.5 30 - 4.5 - P50.8F65K1 50.8 16 17 8 37.6 40.7 56.7/12746 62.37 3.9 △ 30 55.6 84 16 25 8.7 4 - P58F2A2 58 15.88 17.02 8.28 36.1 39.1 60.0/13488 66 2.46 26 44 66.8 84 19.1 21 6.6 4.15/3.10 - P60A2F16 60 15.88 17.02 8.28 36.1 39.1 60.0/13488 66 2.48 26 44 66.8 84 19.1 21 6.6 4.15/3.10 - P62.5A3F1 62.5 48 25 14 53.4 57.5 90.0/20232 99 10.6 40 65 90 130 26 35 11 5 - P63F30K1 63 42 24 10 46 49.5 85.0/19108 93.5 7.67 △ 22 88 112 30 31 10 4 - P68.25F1 68.25 30 15 14 40.3 44.7 70.0/15736 77 4.19 40 70 54 84 21.5 27 8.4 4.5 - P69F4A1 69 30 12.5 9.53 30 34 45.0/10116 50 3.18 △ 60 60 80 27 25 9 3 - P69F5A1 69 25 11.5 5.72 28 30.2 18.0/4046 19.8 2.38 △ 66 48 68 27 15 6.5 3 - P70F29 70 40 19 10 37.1 41 57.0/12814 62.7 4.84 △ 34 60 87 15 30 10.3 3 - P75F6 75 16 16 8 - 41 32.0/7200 35.2 2.44 30 55 60 92 20 22 10 3 - P75F8A2 75 31.8 16 8 - 41 32.0/7200 35.2 3.52 30 55 60 92 20 22 10 3.2 - P75F8A2-F 75 30 16 8 - 41 32.0/7200 35.2 3.8 30 55 60 92 20 22 10 3.2 38 P75F20A1 75 40 22 12 47 52 90.0/20232 99 6.81 △ 55 64 92 25 32 M8 4.5 50 P75F23 75 28 24.4 11.1 - 61.5 140.0/31473 154 4.49 40 60 88 118 37 30 9 6 - P75F27A2 75 45 22 11 - 51.4 62.3/14005 68 7.43 35 60 70 110.9 22 32 10 4.50/4.00 - P75F34A1 75 40 22 12 47 52 90.0/20232 99 6.71 △ 55 70 90 25 32 M8 4.5 50 P75F34A2 75 40 22 12 47 52 75.0/16860 82.5 6.86 30 56 62.4 102.4 22 32 M5 4.5 50 P75F38K2 75 22.2 22 11.3 - 53.5 62.7/14095 69 4.7 30 55 70 94 22 32 10 4.5 - P75F56A1 75 38 22 12 47 52 90.0/20232 99 6.04 △ 45 69 99 25 32 9 4.5 45 P75F57A2 75 15.75 16 8 - 41 32.0/7194 35.2 1.82 30 55 66 98 19.58 22 10 3.2 - P75F63A2 75 40 21.5 12 45.7 49 100.0/22480 110 6.2 25 55.5 71.2 94 22 32 M8 4 - *P76F1K1 76 32 35 16 - 77 240.0/53954 265 12.1 △ 50 109.2 149.2 35 50 11 6 - P76.2F1 76.2 31.75 15 14.2 - 44.2 60.0/13488 66 4.45 31 58 75.4 107 21.25 29 10.5 4.5 - P76.2F41K1 76.2 38.1 25.4 11.1 - 57.5 80.0/17984 88 7.4 △ 51 75 100 39.55 30.2 8.6 4.8 - P76.2F42K1 76.2 38.1 25.4 11.1 - 60.7 120.0/26977 132 7.94 △ 50.8 74.6 101.6 20.6 28.6 8.7 4.80/6.40 - P76.2F14A3 76.2 38.1 25.4 11.1 - 56.5 85.0/19108 93.5 6.1 28.6 50.8 76.2 104.6 19.1 28.6 6.4 4.8 - P76.2F43 76.2 31.74 15.88 7.94 33.1 36.2 54.5/12252 59.95 3.28 25.4 56 70 98 18 25.4 8.5 3.15 - P76.2F69A2 76.2 40 32 12.5 57.9 62.3 100.0/22480 110 9.21 43 67.4 98.2 117 22.7 32.8 8.8 5 50 P78F2K2 78 32 37 15 - 83.2 210.0/47208 231 10.9 30 65 120 150 32 38.1 13 8 - P78F3K2 78 32 37 18 - 94 350.0/78680 385 15.9 30 65 120 150 34 46 13 10 - P78.1F5K2 78.1 31.75 38.1 16.46 - 95 250.0/56200 275 14.5 46 72 89.4 128 35 39.6 12 9.7 - P78.11F8 78.11 31.8 37.1 15 - 83.5 100.0/22480 110 12.05 30 65 120 150 35 38.1 12 7.9 - P78.11F9 78.11 31.75 38.1 15.875 - 90 90.0/20232 99 11.28 38.1 116.6 104.6 133.3 31.75 38.1 14.3 7.9 - P80F4 80 30 15 13.9 42.5 46.5 86.0/19333 95 3.97 40 70.2 57.4 87.4 22.95 27.1 8.5 5.60/4.15 - P80F4-P 80 45 15 13.9 42.5 46.5 86.0/19333 94.6 5.67 40 70.2 57.4 87.4 22.95 27.1 8.5 5.60/4.15 - P80F63A2 80 30 20 11 47.9 52 86.0/19333 94.6 5.3 40 70.2 62.4 92.4 22.95 27.1 8.5 5.60/4.15 40 P85A2F1 85 44.45 16 10 - 56.6 90.0/20232 100 6.8 30 50.4 95 125 22.5 35 9 4.8 - P90F5A2 90 31.8 16.1 8 - 41 32.0/7193 35 2.86 40 65 60 92 20 22 10 3.2 42 P90F8A2-GK 90 45 37 12.7 69.1 74 140.0/31472 154 11.9 40 75 96 118 44.5 38 11 6 - P95F1A2 95 30 23 10 45.5 49.5 60.0/13488 66 3.79 40 65 66.4 96.4 22.5 25 8.5 4 40 P97.5F1 97.5 50 24 15 - 52 100.0/22480 110 6.51 - 50 - 130 35 35 - 4 -
△Attachments with 1 hole
Conveyor chain designed and manufactured for the most demanding of environments
Qingdao Star Machine Technology Co.,ltd. provides the highest quality materials and manufacturing methods to suit the most arduous of conveyor chain applications - from the transport of biomass fuels, to the recycling industry, paper & pulp, cement, steel-work, the wood industry and food processing.
Our conveyor chains, sprocket wheels and attachments are case-hardened to achieve the optimum balance between strength, durability and resistance to wear.
Our manufacturing is focused on metric pitch conveyor chains that include:
International Standards DIN 8167/ISO 1977 M series
DIN 8165/ISO 1977 FV series
SMS 1968 S series
Construction of the chain
Two different sizes of roller chain, showing construction.
There are two types of links alternating in the bush roller chain. The first type is inner links, having two inner plates held together by two sleeves or bushings upon which rotate two rollers. Inner links alternate with the second type, the outer links, consisting of two 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 one step in assembly of the chain.
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 one 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 two rows of plates on the outer sides of the chain, there may be three ("duplex"), four ("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.
Use
An example of two '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 onto 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 forward 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 two sprockets, since it is always the smaller one 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.
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 two 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 for additonal 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):
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 Worldwide 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 worldwide range from end users to distributors and OEMs. Our OEM replacements can be substituted wherever necessary and suitable for both repair and new assemblies.
△Attachments with 1 hole
Conveyor chain designed and manufactured for the most demanding of environments
Qingdao Star Machine Technology Co.,ltd. provides the highest quality materials and manufacturing methods to suit the most arduous of conveyor chain applications - from the transport of biomass fuels, to the recycling industry, paper & pulp, cement, steel-work, the wood industry and food processing.
Our conveyor chains, sprocket wheels and attachments are case-hardened to achieve the optimum balance between strength, durability and resistance to wear.
Our manufacturing is focused on metric pitch conveyor chains that include:
International Standards DIN 8167/ISO 1977 M series
DIN 8165/ISO 1977 FV series
SMS 1968 S series
Construction of the chain
Two different sizes of roller chain, showing construction.
There are two types of links alternating in the bush roller chain. The first type is inner links, having two inner plates held together by two sleeves or bushings upon which rotate two rollers. Inner links alternate with the second type, the outer links, consisting of two 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 one step in assembly of the chain.
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 one 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 two rows of plates on the outer sides of the chain, there may be three ("duplex"), four ("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.
Use
An example of two '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 onto 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 forward 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 two sprockets, since it is always the smaller one 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.
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 two 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 for additonal 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):
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 Worldwide 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 worldwide range from end users to distributors and OEMs. Our OEM replacements can be substituted wherever necessary and suitable for both repair and new assemblies.