China supplier Agricultural Roller Chain 12A-6 a Series Short Pitch Precision Multiple Strand Timing Chain and Bush Chains wholesaler

Merchandise Description

A Series Limited Pitch Precision Numerous Strand Roller Chains & Bush Chains


Chain No.

Chain No.



Roller diameter


Width amongst inner plates
Pin diameter


Pin length Inner plate depth
Plate thickness


Transverse pitch
    Pt     mm
Tensile toughness


Typical tensile strength


Fat for every meter
q   kg/m
sixty-six 12A-6 19.050 11.ninety one twelve.fifty seven 5.ninety four 139.8 141.8 eighteen.00 2.42 22.78 one hundred ninety.8/42921 209.80 nine.31




Roller chain or bush roller chain is the type of chain travel most generally employed for transmission of mechanical electrical power on many sorts of domestic, industrial and agricultural equipment, including conveyors, wire- and tube-drawing equipment, printing presses, autos, motorcycles, and bicycles. It consists of a series of quick cylindrical rollers held jointly by aspect hyperlinks. It is pushed by a toothed wheel referred to as a sprocket. It is a simple, trustworthy, and productive means of electrical power transmission.


Two diverse measurements of roller chain, exhibiting construction.
There are 2 types of links alternating in the bush roller chain. The initial kind is internal back links, having 2 internal plates held collectively by 2 sleeves or bushings upon which rotate 2 rollers. Inner back links alternate with the 2nd type, the outer links, consisting of 2 outer plates held with each other by pins passing by way of the bushings of the interior backlinks. The “bushingless” roller chain is similar in procedure although not in building alternatively of individual bushings or sleeves keeping the inner plates collectively, the plate has a tube stamped into it protruding from the gap which serves the identical function. This has the gain of eliminating 1 step in assembly of the chain.

The roller chain layout reduces friction in comparison to easier patterns, ensuing in higher efficiency and less put on. The original electricity transmission chain varieties lacked rollers and bushings, with the two the inner and outer plates held by pins which straight contacted the sprocket teeth even so this configuration exhibited incredibly quick dress in of both the sprocket tooth, and the plates in which they pivoted on the pins. This dilemma was partly solved by the development of bushed chains, with the pins keeping the outer plates passing via bushings or sleeves connecting the interior plates. This dispersed the use in excess of a greater region nonetheless the enamel of the sprockets nevertheless wore much more quickly than is attractive, from the sliding friction towards the bushings. The addition of rollers surrounding the bushing sleeves of the chain and presented rolling contact with the tooth of the sprockets resulting in excellent resistance to wear of both sprockets and chain as nicely. There is even very lower friction, as prolonged as the chain is sufficiently lubricated. Constant, cleanse, lubrication of roller chains is of principal significance for successful operation as nicely as appropriate tensioning.


A lot of driving chains (for illustration, in manufacturing facility tools, or driving a camshaft within an interior combustion engine) work in thoroughly clean environments, and thus the putting on surfaces (that is, the pins and bushings) are risk-free from precipitation and airborne grit, numerous even in a sealed atmosphere these kinds of as an oil tub. Some roller chains are developed to have o-rings built into the room in between the outside the house hyperlink plate and the within roller url plates. Chain producers started to include this characteristic in 1971 after the application was invented by Joseph Montano while doing work for Whitney Chain of Hartford, Connecticut. O-rings had been included as a way to boost lubrication to the links of energy transmission chains, a service that is vitally critical to extending their working daily life. These rubber fixtures type a barrier that holds manufacturing facility utilized lubricating grease within the pin and bushing wear regions. Further, the rubber o-rings avert filth and other contaminants from getting into within the chain linkages, where these kinds of particles would normally result in significant use.[citation needed]

There are also a lot of chains that have to run in filthy situations, and for dimension or operational factors are not able to be sealed. Examples contain chains on farm equipment, bicycles, and chain saws. These chains will always have relatively higher costs of put on, specifically when the operators are ready to accept more friction, much less effectiveness, far more noise and far more repeated substitution as they neglect lubrication and adjustment.

A lot of oil-dependent lubricants entice grime and other particles, ultimately forming an CZPT paste that will compound use on chains. This dilemma can be circumvented by use of a “dry” PTFE spray, which kinds a solid film soon after application and repels equally particles and moisture.


Format of a roller chain: 1. Outer plate, 2. Inner plate, 3. Pin, 4. Bushing, 5. Roller
If the chain is not becoming utilized for a high put on 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 varieties of chain may nevertheless be utilised. Conversely, exactly where further energy but the smooth travel of a smaller pitch is required, the chain might be “siamesed” as an alternative of just 2 rows of plates on the outer sides of the chain, there could be 3 (“duplex”), 4 (“triplex”), or far more rows of plates running parallel, with bushings and rollers amongst every single adjacent pair, and the same variety of rows of tooth running in parallel on the sprockets to match. Timing chains on automotive engines, for case in point, normally have several rows of plates called strands.

Roller chain is manufactured in many measurements, the most widespread American Countrywide Expectations Institute (ANSI) expectations becoming forty, 50, 60, and 80. The initial digit(s) point out the pitch of the chain in eighths of an inch, with the very last digit getting 0 for standard chain, 1 for lightweight chain, and 5 for bushed chain with no rollers. Thus, a chain with 50 percent-inch pitch would be a #40 although a #one hundred sixty sprocket would have teeth spaced 2 inches aside, etc. Metric pitches are expressed in sixteenths of an inch hence a metric #8 chain (08B-1) would be equivalent to an ANSI #40. Most roller chain is manufactured from simple carbon or alloy steel, but stainless metal is utilised in foodstuff processing equipment or other spots exactly where lubrication is a problem, and nylon or brass are at times observed for the very same explanation.

Roller chain is ordinarily hooked up utilizing a master url (also recognized as a connecting url), which usually has 1 pin held by a horseshoe clip fairly than friction fit, permitting it to be inserted or eliminated with easy equipment. Chain with a removable link or pin is also recognized as cottered chain, which permits the length of the chain to be modified. Half back links (also known as offsets) are offered and are used to boost the size of the chain by a single roller. Riveted roller chain has the learn hyperlink (also acknowledged as a connecting link) “riveted” or mashed on the finishes. These pins are manufactured to be durable and are not removable.


An instance of 2 ‘ghost’ sprockets tensioning a triplex roller chain program
Roller chains are used in minimal- to mid-speed drives at close to 600 to 800 ft for every moment however, at increased speeds, close to 2,000 to 3,000 ft for each minute, V-belts are generally utilized because of to dress in and noise concerns.
A bicycle chain is a form of roller chain. Bicycle chains may possibly have a master url, or could call for a chain tool for elimination and installation. A similar but greater and therefore more robust chain is utilised on most bikes despite the fact that it is occasionally changed by either a toothed belt or a shaft drive, which supply lower sounds degree and much less maintenance requirements.
The great vast majority of vehicle engines use roller chains to travel the camshaft(s). Quite high overall performance engines usually use gear drive, and starting in the early sixties toothed belts had been utilised by some manufacturers.
Chains are also utilised in forklifts employing hydraulic rams as a pulley to CZPT and lower the carriage nevertheless, these chains are not regarded roller chains, but are categorised as lift or leaf chains.
Chainsaw reducing chains superficially resemble roller chains but are a lot more closely connected to leaf chains. They are pushed by projecting push back links which also serve to identify the chain onto the bar.

Sea Harrier FA.2 ZA195 entrance (chilly) vector thrust nozzle – the nozzle is rotated by a chain travel from an air motor
A maybe strange use of a pair of bike chains is in the Harrier Jump Jet, in which a chain drive from an air motor is employed to rotate the movable engine nozzles, enabling them to be pointed downwards for hovering flight, or to the rear for standard ahead flight, a system identified as Thrust vectoring.

Dress in


The effect of wear on a roller chain is to boost the pitch (spacing of the hyperlinks), triggering the chain to develop more time. Notice that this is owing to use at the pivoting pins and bushes, not from true stretching of the steel (as does occur to some versatile steel factors such as the hand-brake cable of a motor automobile).

With CZPT chains it is abnormal for a chain (other than that of a bicycle) to wear until it breaks, since a worn chain leads to the fast onset of wear on the enamel of the sprockets, with greatest failure being the loss of all the tooth on the sprocket. The sprockets (in certain the more compact of the two) suffer a grinding motion that places a characteristic hook form into the pushed encounter of the teeth. (This result is produced even worse by a chain improperly tensioned, but is unavoidable no subject what care is taken). The worn enamel (and chain) no for a longer time offers sleek transmission of electrical power and this may grow to be evident from the sounds, the vibration or (in automobile engines using a timing chain) the variation in ignition timing noticed with a timing mild. The two sprockets and chain should be changed in these circumstances, because a new chain on worn sprockets will not previous prolonged. Even so, in significantly less severe instances it could be achievable to preserve the larger of the 2 sprockets, given that it is constantly the more compact 1 that suffers the most wear. Only in extremely light-weight-fat apps this sort of as a bicycle, or in severe circumstances of inappropriate pressure, will the chain usually bounce off the sprockets.

The lengthening thanks to use of a chain is calculated by the following formulation:

M = the length of a number of hyperlinks measured

S = the quantity of backlinks measured

P = Pitch

In industry, it is typical to keep track of the movement of the chain tensioner (whether or not guide or automated) or the precise length of a drive chain (one rule of thumb is to substitute a roller chain which has elongated 3% on an adjustable generate or 1.5% on a fixed-center push). A simpler method, notably suitable for the cycle or motorbike person, is to try to pull the chain absent from the more substantial of the 2 sprockets, even though making sure the chain is taut. Any important movement (e.g. creating it possible to see by means of a gap) possibly signifies a chain worn up to and over and above the restrict. Sprocket hurt will result if the difficulty is ignored. Sprocket put on cancels this impact, and may possibly mask chain wear.


The most frequent evaluate of roller chain’s strength is tensile power. Tensile toughness represents how considerably load a chain can face up to under a one-time load before breaking. Just as essential as tensile power is a chain’s fatigue strength. The essential factors in a chain’s tiredness strength is the high quality of steel employed to manufacture the chain, the warmth treatment method of the chain factors, the quality of the pitch hole fabrication of the linkplates, and the variety of shot furthermore the depth of shot peen protection on the linkplates. Other variables can contain the thickness of the linkplates and the design and style (contour) of the linkplates. The rule of thumb for roller chain operating on a continuous drive is for the chain load to not CZPT a mere 1/6 or 1/9 of the chain’s tensile power, relying on the kind of learn backlinks employed (press-fit vs. slip-suit)[citation essential]. Roller chains operating on a continuous generate outside of these thresholds can and normally do are unsuccessful prematurely through linkplate exhaustion failure.

The regular bare minimum final strength of the ANSI 29.1 metal chain is 12,five hundred x (pitch, in inches)two. X-ring and O-Ring chains tremendously lessen use by means of internal lubricants, increasing chain lifestyle. The inside lubrication is inserted by means of a vacuum when riveting the chain together.


Specifications businesses (these kinds of as ANSI and ISO) preserve specifications for design, dimensions, and interchangeability of transmission chains. For example, the following Desk exhibits info from ANSI common B29.1-2011 (Precision Energy Transmission Roller Chains, Attachments, and Sprockets) produced by the American Modern society of Mechanical Engineers (ASME). See the references[8][9][10] for extra information.

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

ASME/ANSI B29.1-2011 Roller Chain Regular Dimensions
Size Pitch Highest Roller Diameter Minimum Supreme Tensile Toughness Measuring Load
twenty five .250 in (6.35 mm) .a hundred thirty in (3.30 mm) 780 lb (350 kg) 18 lb (8.2 kg)
35 .375 in (9.53 mm) .200 in (5.08 mm) 1,760 lb (800 kg) eighteen lb (8.2 kg)
forty one .five hundred in (12.70 mm) .306 in (7.77 mm) one,five hundred lb (680 kg) 18 lb (8.2 kg)
40 .500 in (twelve.70 mm) .312 in (7.ninety two mm) three,125 lb (1,417 kg) 31 lb (fourteen kg)
fifty .625 in (15.88 mm) .400 in (10.sixteen mm) 4,880 lb (2,210 kg) 49 lb (22 kg)
sixty .750 in (19.05 mm) .469 in (11.91 mm) 7,030 lb (3,a hundred ninety kg) 70 lb (32 kg)
eighty one.000 in (twenty five.40 mm) .625 in (fifteen.88 mm) 12,five hundred lb (5,seven-hundred kg) 125 lb (fifty seven kg)
100 1.250 in (31.seventy five mm) .750 in (19.05 mm) 19,531 lb (8,859 kg) 195 lb (88 kg)
120 one.500 in (38.10 mm) .875 in (22.23 mm) 28,a hundred twenty five 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)
one hundred sixty two.000 in (50.eighty mm) one.a hundred twenty five in (28.58 mm) 50,000 lb (23,000 kg) 500 lb (230 kg)
one hundred eighty 2.250 in (fifty seven.fifteen mm) one.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.sixty seven mm) 78,one hundred seventy five lb (35,460 kg) 781 lb (354 kg)
240 three.000 in (seventy six.20 mm) one.875 in (forty seven.sixty three mm) 112,500 lb (51,000 kg) 1,000 lb (450 kg

For mnemonic reasons, underneath is yet another presentation of key dimensions from the exact same normal, expressed in fractions of an inch (which was component of the considering behind the option of favored figures in the ANSI standard):

Pitch (inches) Pitch expressed
in eighths
ANSI standard
chain quantity
Width (inches)
one4 2eight two5 one8
3eight 3eight three5 threesixteen
1two 4eight 41 onefour
onetwo 48 four five16
five8 fiveeight five 3eight
3four sixeight six 12
one eight8 eight fiveeight

one. The pitch is the length in between roller facilities. The width is the length in between the link plates (i.e. marginally far more than the roller width to permit for clearance).
two. The appropriate-hand digit of the standard denotes 0 = standard chain, 1 = lightweight chain, 5 = rollerless bushing chain.
3. The remaining-hand digit denotes the variety of eighths of an inch that make up the pitch.
four. An “H” adhering to the common number denotes heavyweight chain. A hyphenated number pursuing the normal number denotes double-strand (2), triple-strand (3), and so on. Thus 60H-3 denotes variety 60 heavyweight triple-strand chain.
 A normal bicycle chain (for derailleur gears) makes use of slim 1⁄2-inch-pitch chain. The width of the chain is variable, and does not have an effect on the load capability. The much more sprockets at the rear wheel (historically 3-6, presently 7-12 sprockets), the narrower the chain. Chains are marketed in accordance to the number of speeds they are created to work with, for illustration, “10 velocity chain”. Hub gear or single pace bicycles use 1/2″ x 1/8″ chains, exactly where 1/8″ refers to the maximum thickness of a sprocket that can be utilised with the chain.

Usually chains with parallel formed back links have an even quantity of hyperlinks, with each slender link followed by a broad 1. Chains constructed up with a uniform kind of url, slender at 1 and broad at the other end, can be created with an odd quantity of backlinks, which can be an gain to adapt to a special chainwheel-length on the other aspect this kind of a chain tends to be not so sturdy.

Roller chains created utilizing ISO common are often known as as isochains.


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The 219 sets of sophisticated automatic production tools offer ensures for high item good quality. The 167 engineers and technicians with senior expert titles can design and style and develop goods to fulfill the precise requires of buyers, and OEM customizations are also accessible with us. Our sound international provider community can give buyers with timely following-revenue specialized solutions.

We are not just a maker and provider, but also an market expert. We operate professional-actively with you to offer you specialist tips and item recommendations in purchase to finish up with a most price powerful merchandise obtainable for your distinct software. The clientele we provide around the world assortment from end consumers to distributors and OEMs. Our OEM replacements can be substituted where ever essential and suitable for equally mend and new assemblies.


Suggestions for Getting Roller Chains

There are many factors to contemplate when buying a new roller chain. Chains can be large-obligation roller chains or self-lubricating chains. These aspects all influence the dress in of the roller chain. Proper lubrication and adjustment are critical to lengthen the daily life of the chain. Right here are suggestions for getting a new roller chain. Some typical types of roller chains are shown under. The variety you choose relies upon on its function.

Bushingless Roller Chains

The tensile toughness of a bushingless roller chain is usually the main evaluate of its durability. It signifies the maximum load a chain can stand up to before breaking, but tiredness power is just as essential. Factors that affect exhaustion power include the steel used to manufacture the chain, the good quality of the pitch holes, the variety of shot peening utilised, and the thickness and design of the chainplates. Below are some ideas on how to check the fatigue toughness of bushless roller chains.
The internal link plate a hundred thirty is thicker than the outer website link plate one hundred twenty. This attribute assists the connecting pins and rollers remain steady. This function reduces wear and noise. It also enhances the general durability of the chain. In contrast to classic chains, bushingless roller chains are less complicated to maintain than comparable chains. They also lessen the danger of sprocket put on. Bushingless roller chains are excellent for demanding apps in which noise is a problem.
Unlined roller chains are typically significantly less expensive than lined roller chains. Bushings are built-in into the internal plate, whilst those in traditional chains are inserted into the outer plate. The outcome is reduce price and much more flexible lateral motion – a requirement for modern derailleur gearing. But with all these benefits, deciding on a linerless chain is still important. You need to go through evaluations about the durability of bushingless roller chains before purchasing.
In its easiest kind, the connecting pin one hundred forty is pressed into the pinhole 126 in the course of chain vacation. Connecting pins 140 prolong by means of these holes to join the inner link plate and the rollers. The connecting pins can also be welded to the outer link plates. During assembly, chain C can be successfully assembled from a single side in the engine width course. If you have an older auto, you can try out the bushless model and see how it goes.
Another variation of bushless roller chains includes sprockets and connecting pins. The outer url plate has connecting pins extending via holes in the interior hyperlink plate. The rollers are capable to rotate on the connecting pins, as a result lubricating them. There are two sorts of bushingless roller chains: connecting pin chains and sprocket chains. These two varieties of bushingless roller chains are normally interchangeable.
Linerless roller chains can contain chain guides. Throughout the riveting process, the outer and inner hyperlink plates compress against each and every other, minimizing friction and electrical power decline. ANSI Normal B29.1-2011 is developed to make it less complicated for you to decide on the appropriate chain for your motor vehicle. This edition is also quieter, lowering sound. In addition to enhanced performance, bushingless roller chains provide greater durability. It is simpler to set up and significantly less pricey to keep.

Solitary Strand Large Duty Roller Chain

One Strand Large Responsibility Roller Chains, also acknowledged as One Strand Hefty Duty Roller Chains, are offered in a range of dimensions. These chains run on standard roller sprockets and have thicker facet plates. These boost their tensile power, fatigue ranking and overall operating lifestyle. Monostrand chains are offered in three quality amounts: riveted, open up and shut.
If your chain requirements to be replaced, your greatest guess is to buy substitution components. One strand roller chains are typically ten toes long. For more substantial dimensions, think about acquiring a one-strand large-duty roller chain that is 3 times for a longer time. This way, you do not have to be concerned about harmful your machine. Oregon roller chains are made to OEM standards.
CZPT Additionally Large Responsibility Roller Chains attribute solid rollers for mild to medium obligation apps. It fulfills ANSI B29.1 durability expectations and is excellent for mild to medium responsibility apps. CZPT Furthermore Heavy Responsibility Roller Chains have solid bushings in selected sizes to ANSI B29.1. CZPT Furthermore large obligation roller chains are equipped with sufficient lubricant. If your software requires large duty roller chains, you can uncover them at CZPT Chain and Sprockets.
In addition to single-strand large-responsibility roller chains, there are three-strand large-duty roller chains. These chains can withstand huge pressure and are excellent for programs in agriculture, sewage treatment, equipment, and far more. They are created to last for a long time with out breaking. So regardless of whether you happen to be seeking for a weighty obligation roller chain for your farm gear or design, American Roller Chain has you lined.
In purchase to choose the correct measurement for your needs, you need to first determine the diameter and overall width of the roller chain. You also have to evaluate the width of the drum by itself. This data will determine how many chains you need to buy. The measurement and choice of proportions will determine the cost of your new roller chain. Acquiring the right roller chain is easy and practical if you recognize all of these elements. So use a caliper and make confident the roller chain is measured properly.
The dimensions of a single strand weighty responsibility roller chain is crucial to the balance of your business. You can conserve a great deal of money by buying a large-quality roller chain. Just make positive to store it effectively. Its shelf life is virtually limitless. When appropriately saved, a one-strand heavy responsibility roller chain can increase the steadiness of your organization for many years to appear. A single-strand chain is an cost-effective expense that will pay out dividends for your company.

Self-lubricating roller chain

Self-lubricating roller chains can be employed in a range of applications. This sort of chain is an exceptional selection for locations that cannot be manually lubricated. It also lowers the danger of contamination as no lubricant is necessary at all. Self-lubricating roller chains are accessible in a assortment of designs and are appropriate with a wide assortment of foods purposes. If you’re interested in learning more about these kinds of chains, keep looking through!
There are two primary types of chains of this type: DIN ISO 606 and DIN 8187. They are similar in design to standard chains, but are more sturdy. They have larger friction and wear resistance than traditional roller chains. These chains are also quite powerful in apps that require a good deal of humidity and h2o flushing. They call for less servicing and can final a long time. Another benefit of self-lubricating chains is that they final longer than normal roller chains, which can be really costly.
Yet another self-lubricating roller chain is the non-lubricating sort. These chains are internally lubricated and isolated from the exterior atmosphere. Perfect for low to high load apps, these chains will previous 5 to 20 instances lengthier than similar to begin with lubricated roller chains. Self-lubricating roller chains have so many benefits, you’ll be glad you acquired a single.

China supplier Agricultural Roller Chain 12A-6 a Collection Quick Pitch Precision Multiple Strand Timing Chain and Bush Chains     wholesaler