ANSI. B29.1 H Series Roller Chains & High Impact Load Versions

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American Standard Roller Chains Heavy (H) Series based on ISO 606R /Din 8188

H Series Roller Chains are based on the Standard Series Chains, although normally supplied and produced as a riveted chain, they can also be supplied as a cottered type if required.

The only difference from the standard series is the increase in plate thickness, for example a ASA 60H chain would have the same plate thickness of ASA80, by increasing the plate thickness it improves the capacity to absorb shock loads by 10%. Beside increasing the side plate thickness, other Production Technics can be introduced to provide chains capable of up to 30% Higher for Heavy Duty applications in the Earth Moving & Quarrying Industries.

Production Measures that can be included to provide Chains that are more suitable for High Impact Loads :-

  1. Through Hardened Pins
  2. Shaped Side Plates
  3. Interference Fit Between Pins & Outer Plates

Precision Roller Chains: as the company offer a combined range, that is produced by a number manufacturers from around the World, they have adopted the following Quality Standards :-

  • All chains have been produced in plant that is Certified to ISO 9001.
  • Chains covered by the ISO 606R Standard, will conform to this Standard of Specification and Quality.
  • For chains not covered by ISO606R, then we have adopted the appropriate Din 8187 or Din 8188 or Ansi B 29.1 of Specification and Quality Standard.
  • Work standard chains not covered by the above standards will conform to the appropriate Manufacturer’s Standard.

Range of Sizes

Note: We are continuously adding to or Extending our Ranges, hence if you cannot find it listed here, then please contact us via the ENQUIRY link on each page.

Supply Size

Std Box length: 5meters, 10Ft

Cut lengths: to order


Parts & Tools

Connecting Links:-Sizes up to & inclusive of 1”Pitch(16B) are available in SPRING CLIP TYPE and for Size 1”Pitch(16B) & above would COTTERED or SPLIT PIN TYPE.

Offset/Crank Link: Single pitch type only

Chain Breakers: 3/8″ to 3/4″ & 3/4″ to 1-1/4″


Alternative Materials

Increased Capacity Types:

  1. Through Harden Pins
  2. Shaped side Plates
  3. Interference Fit between Pins & side Plates

All provide increase load or Shock Capacity mainly for Earth moving & Quarry applications

Sourcing Service

If you cannot find the Chain you are looking for or you have a reference not listed here then in the first instance, please review our CROSS REFERENCE LISTING page or if you still cannot find what you are looking for then ask our Sales office by utilising the ENQUIRY button.


Identifying High Impact Load Chains:

This is not easy, as these chains conform to the same nominal sizes as the Standard Series & Heavy Series Chains. Beside the normal dimensions, you will also need to check for :-

  1. Test for a Harden Pin, with a file.
  2. Check for Increased Side Plate Height, not figure of eight (Be careful not to confuse this with a Straight Side Plate chain).
  3. Check for Interference Fit between Pin & Bush, normally you can not remove the connecting link without a press.

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