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Accumulator Chain


Accumulator chains are one of the relatively new chain types within the industry. These chains were introduced in the 1970s as a solution for conveying sensitive items that needed to be accumulated in a sensitive manner. Many manufacturers worldwide have since produced, retrofitted, and modified accumulator chains to support individual application needs. However, seven configurations have become the most sought-after and "standard" accumulator chain types (type A, B, C, D, E, F, G). Other suppliers designate them with different letters, but we will show you below how to interchange our part numbers with others! Here at USA Roller Chain, we pride ourselves in our genuine tier-one accumulator chain lineup; we offer standard and non-standard configurations. Additionally, we supply these chains in different materials, such as; carbon steel, stainless steel, and plastics, along with their required accessories (sprockets and guides).

Applications-wise, an accumulator chain (also known as an accumulation roller chain) is used in anything from robotics, electrical, scientific components, food packaging, and more. The beneficial design controls products precisely while the chain continues to move linearly. Our tier-one accumulator chains come equipped with the latest chain innovations and technology, including precision heat treatment of components, special shot-peening, specific pre-stressing, and high-precision parts. Additionally, we offer accumulator chains featuring through-hardened pins, solid bushings, and quad-staked rivets. Our premium accumulator chains are engineered and manufactured to boast superb performance and durability. For additional information or to get a quote, contact our customer service team, and we will be happy to assist you!

We supply seven different configurations of accumulator chains as a standard. However, we offer custom accumulator chain configurations with a supplied drawing or print.
Additionally, these configurations are available in BS metric chain sizes and ANSI from stainless or carbon materials with optional polymer rollers.

Type-A Accumulator chains are designed with an enlarged roller at every other pin (every 2nd pitch) and smaller rollers extending on both sides of the chain that encompass extended pins. These chains are considered single-strand (simplex) accumulator chains.
Type A Accumulator Chain Dimensions:
Chain Part # Pitch (p) Type
(b1)
(b2)
(b3)
(b4)
(d1)
(d2)
(e)
(g)
(I) (b5)
513SF-ACU 19.05mm A 11.68mm 15.62mm 15.80mm 20.00mm 12.00mm 5.72mm 31.50mm 16.10mm 48.00mm 11.50mm
548SF-ACU 25.40mm A 17.02mm 25.45mm 25.81mm 32.00mm 15.88mm 8.28mm 44.50mm 21.00mm 65.00mm 12.50mm
513SFRF-ACU 19.05mm A, Stainless 11.68mm 15.62mm 15.80mm 20.00mm 12.00mm 5.72mm 31.50mm 16.10mm 48.00mm 11.50mm
513SFRF-ACU 25.40mm A, Stainless 17.02mm 25.45mm 25.81mm 32.00mm 15.88mm 8.28mm 44.50mm 21.00mm 65.00mm 12.50mm


Type-B accumulator roller chains have enlarged rollers on every pin/ pitch, with smaller side rollers riding on extended pins on every pitch. This type of accumulator chain is also a simplex type chain.
Type B Accumulator Chain Dimensions:
Chain Part # Pitch (p) Type
(b1)
(b2)
(b3)
(b4)
(d1)
(d2)
(e)
(g)
(I) (b5)
722SF-ACU 38.10mm B 11.68mm 15.62mm 15.80mm 20.00mm 12.00mm 5.72mm 31.50mm 16.10mm 48.00mm 11.50mm
728SF-ACU 50.80mm B 17.02mm 25.45mm 25.81mm 32.00mm 15.88mm 8.28mm 44.50mm 21.00mm 65.00mm 12.50mm
722SFRF-ACU 38.10mm B, Stainless 11.68mm 15.62mm 15.80mm 20.00mm 12.00mm 5.72mm 31.50mm 16.10mm 48.00mm 11.50mm
728SFRF-ACU 50.80mm B, Stainless 17.02mm 25.45mm 25.81mm 32.00mm 15.88mm 8.28mm 44.50mm 21.00mm 65.00mm 12.50mm

Type-C accumulator chains have a unique design encompassing enlarged rollers, every other pin alternating between the double-strand (duplex) set of chains. The chain also features smaller rollers that extend on both sides of the chain riding on the extended pins. These chains are commonly referred to as duplex accumulator roller chains.
Type C Accumulator Chain Dimensions:
Chain Part # Pitch (p) Type
(b1)
(b2)
(b3)
(b4)
(d1)
(d2)
(e)
(g)
(I) (b5)
D513SF-ACU 19.05mm C 11.68mm 15.62mm 15.80mm 20.00mm 12.07mm 5.72mm 52.00mm 16.10mm 68.00mm 11.50mm
D548SF-ACU 25.40mm C 17.02mm 25.45mm 25.81mm 32.00mm 15.88mm 8.28mm 76.76mm 21.00mm 97.00mm 12.50mm

Type-D accumulator chains are triple-strand (triplex) chains designed with an enlarged roller on every other pin (2nd pitch) on the innermost section of the chain. This chain does not have "side rollers" that ride on extended pins.
Type D Accumulator Chain Dimensions:
Chain Part # Pitch (p) Type
(b1)
(b2)
(b3)
(b4)
(d1)
(d2)
(e)
(g)
(I)
T455SF-ACU 9.525mm D 5.72mm 8.53mm -- -- 6.35mm 3.28mm 20.48mm 8.20mm 34.00mm
T513SF-ACU 19.050mm D 11.68mm 15.62mm 15.80mm 20.00mm 12.07mm 5.72mm 38.92mm 16.10mm 61.70mm
T548SF-ACU 25.400mm D 17.02mm 25.45mm 25.81mm 32.00mm 15.88mm 8.28mm 63.76mm 21.00mm 99.90mm
T513SFRF-ACU 19.050mm D, Stainless 11.68mm 15.62mm 15.80mm 20.00mm 12.07mm 5.72mm 38.92mm 16.10mm 61.70mm
T548SFRF-ACU 25.400mm D, Stainless 17.02mm 25.45mm 25.81mm 32.00mm 15.88mm 8.28mm 63.76mm 21.00mm 99.90mm

Type-E accumulator chains are designed with an enlarged roller every third pin (3rd pitch); these chains are designed for large products that need to be accumulated and are triple strand (triplex) type chains.
Type E Accumulator Chain Dimensions:
Chain Part # Pitch (p) Type
(d1)
(D)
(lg)
(b1)
(b6)
(Pt)
303N-ACU 9.525mm E 6.35mm 14.00mm 7.40mm 5.77mm 33.00mm 10.24mm
307N-ACU 12.700mm E 8.51mm 18.00mm 9.90mm 7.75mm 44.60mm 13.92mm
311N-ACU 15.875mm E 10.16mm 22.00mm 11.70mm 9.65mm 52.30mm 16.59mm
313N-ACU 19.050mm E 12.07mm 28.00mm 15.5mm/ 19.0mm 11.68mm 61.40mm 19.46mm
315T-ACU 25.400mm E 15.88mm 35.00mm 24.40mm 17.02mm 99.90mm 31.88mm
317T-ACU 31.750mm E 19.05mm 45.00mm 35.10mm 19.56mm 116.10mm 36.45mm
318T-ACU 38.100mm E 25.40mm 50.00mm 47.00mm 25.40mm 150.20mm 48.36mm

Type-F accumulator roller chains have alternating enlarged rollers on both sides of the chain. It is considered a single-strand (simplex) accumulator chain.
Type F Accumulator Chain Dimensions:
Chain Part # Pitch (p) Type
(d1)
(D)
(b1)
(b4)
(b5)
7N-ACU 12.700mm F 8.51mm 15.8mm 7.75mm 16.60mm 33.00mm
11N-ACU 15.875mm F 10.16mm 22.0mm 9.65mm 19.00mm 42.00mm
13N-ACU 19.050mm F 12.07mm 25.0mm 11.68mm 22.30mm 48.00mm

Last but not least, the type-G accumulator chains are designed with extended pins encompassed with enlarged rollers every 3rd pitch. This accumulator roller chain is considered a single-strand (simplex) type chain.
Type G Accumulator Chain Dimensions:
Chain Part # Pitch (p) Type
(d1)
(D)
(b1)
(b4)
(b5)
7N-D-ACU 12.700mm G 8.51mm 15.8mm 7.75mm 16.60mm 33.00mm
11N-D-ACU 15.875mm G 10.16mm 22.0mm 9.65mm 19.00mm 42.00mm
13N-D-ACU 19.050mm G 12.07mm 25.0mm 11.68mm 22.30mm 48.00mm
When it comes to accessories, we offer a full range of accessories to accommodate existing and new accumulator applications.
Accumulator Chain Clips:

These unique clips prevent smaller articles from falling through your accumulator chain and prevent fingers or unwanted objects from getting caught up in the chain for improved safety. Accumulator chains can be supplied with these clips, or we can supply cli[s retro-fitting current chain applications.
Self-Lubricating/Maintenance-Free Accumulator Chain:

Self-lubricating accumulator chains utilize special pins and or bushings that are impregnated with oil that is released when needed throughout the life of the chain. This particularly comes in handy when transferring products that can be damaged or stained from grease or oil and when the accumulator chain is operating in difficult to accesses areas.
Accumulator chain Guide Plates:

Guide plates are available on various accumulator chains and in different configurations.
Accumulator Chain Guide:
Chain guides for accumulator chains are available in various options and designs. Guides are typically made from UHMW, which has excellent low-friction properties without the need for lubrication and is acceptable in food-grade applications. We also offer accumulator chain guides made from different polymers that can withstand high and low-temperature applications. The chart below shows some of the standard accumulator guides.
Chain Part # Dimension (B3) Dimension (H)
513SF-ACU 20.8mm 15.0mm
513SFK-ACU 20.8mm 15.0mm
D513SF-ACU 40.5mm 15.0mm
548SF-ACU 33.0mm 20.0mm
D548SF-ACU 66.0mm 20.0mm
722SF-ACU 20.8mm 15.0mm
728SF-ACU 33.0mm 27.0mm
Accumulator Chain Sprockets:
We also supply a range of sprockets for accumulator chains. Please note that accumulator chain sprockets are custom-made to order, and lead times vary dependent on quantity and urgency. We do offer expedited lead times as short as three business days.
Chain Size Dimension (B) Dimension (B2)
Dimension (F)
T455-ACU 5.2mm 15.3mm 8.0mm
513SF-ACU 10.6mm 20.8mm 16.0mm
D513SF-ACU 10.6mm 42.0mm 16.0mm
T513SF-ACU 10.8mm 28.2mm 16.0mm
548SF-ACU 12.0mm 33.0mm 22.0mm
D548SF-ACU 12.0mm 66.0mm 22.0mm
T548SF-ACU 15.8mm 48.0mm 22.0mm
722SF-ACU 10.6mm 20.8mm 16.0mm
728SF-ACU 12.0mm 33.0mm 27.0mm
Side-Flexing Accumulator Chains:

Side flexing accumulating roller chains are designed in a special way that allows them to function while turning around a radius. Every style of accumulator chains are available as a side flexing option.
Accumulator Chain Cross Reference


The chart below shows different manufacturers' part #s compared with USA Roller Chain part #s. It is important to note that if you don't see your specific part # on the below chart, we will still supply it; contact us with the chain details.

USA Roller Chain Part # Whipperman Part # P.T International Part # SEDIS Part # Notes
513SF-ACU 513SF E12B-1-513SF -- Type A
548SF-ACU 548SF E16B-1-548SF -- Type A
722SF-ACU 722SF E24B-1-722SF -- Type B
728SF-ACU 728SF E32B-1-728SF -- Type B
D513SF-ACU D513SF E12B-2-513SF -- Type C
D548SF-ACU D548SF E16B-2-584SF -- Type C
T455SF-ACU T455SF E06B-3-455SF -- Type D
T513SF-ACU T513SF E12B-3-513SF -- Type D
T548SF-ACU T548SF E16B-3-548SF -- Type D
513SFRF-ACU 513SFRF E12B-1SS-513SF -- Type A, Stainless Steel
548SFRF-ACU 548SFRF E16B-1SS-548SF -- Type A, Stainless Steel
722SFRF-ACU 722SFRF E24B-1SS-722SF -- Type B, Stainless Steel
728SFRF-ACU 728SFRF E-32B-1SS-728SF -- Type B, Stainless Steel
T513SFRF-ACU T513SFRF E12B-3SS-513SF -- Type D, Stainless Steel
T548SFRF-ACU T548SFRF E16B-3SS-548SF -- Type D, Stainless Steel
303N-ACU -- -- 303N Type E
307N-ACU -- -- 307N Type E
311N-ACU -- -- 311N Type E
313N-ACU -- -- 313N Type E
315T-ACU -- -- 315T Type E
317T-ACU -- -- 317T Type E
318T-ACU -- -- 318T Type E
7N-ACU -- -- 7N Type F
11N-ACU -- -- 11N Type F
13N-ACU -- -- 13N Type F
7N-D-ACU -- -- 7N-D Type G
11N-D-ACU -- -- 11N-D Type G
13N-D-ACU -- -- 13N-D Type G



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