Ask The Engineer

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  • What is "working load" and what role does it play in selecting roller chain?

    To start, we should clarify that working load, also known as chain pull, and tensile strength are not the same. Working load describes the amount of linear pull exerted on a chain by a drive while tensile strength is the amount of force required for that chain to fail. While these measurements can...Read More
  • Someone threw me a curveball, how do I convert pitch to feet?

    To answer this question, let's do a quick refresher on the ANSI part numbering system. The first digit(s) in each standard roller chain part number tells us the pitch of a chain in eighths of an inch. That means that an ANSI 120 chain, for example, has a pitch of 12/8s of an inch or 1.5 inches. ...Read More
  • How should you count the number of pitch in a strand of roller chain?

    While "one at a time" and "correctly" seemed to be the most frequent, and apparently most amusing, answers from our engineering team - after some consideration, we thought this deserved an answer that was a bit more practical. One mistake that is commonly made when counting the number of pitches ...Read More
  • Bi-colored Diamond Motorcycle Chain

    Q - In the late 1940s, Harley Davidson made a lightweight 2 stroke motorcycle that used Diamond #35 chain in the front and #40 in the rear. What was the last year that Diamond Chain manufactured this bi-color (blue inner links and gray outer plates) #40 roller chain? A - Diamond Chain discontinu...Read More
  • Why does Diamond's maintenance free Duralube chain ship with additional external lubricant?

    Although Duralube's sintered bushing and rollers have lubricant drawn in under vacuum, the additional external lubricant applied prior to shipping provides additional protection for the roller chain. In addition to providing overall lubrication that will maximize the service life of the chain, the ...Read More
  • How does Diamond Chain mark the links on their products?

    Q - I want to make sure I'm getting the real "McCoy" and not an inferior company's chain. A - Diamond Chain uses three distinct product marks to differentiate between its Diamond, Infinity, and Sapphire product series. Diamond Chain's flagship Diamond series includes a stamp of the words "Diamon...Read More
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ASME / ANSI Roller Chain

Diamond Series

Diamond Chain's extensive ASME / ANSI product assortment provides industry leading wear life and is available in a variety of base materials, finishes, and lubrications.

Attachement Roller Chain

Infinity Series

Available in ANSI 25 through 240 and ISO 05B through 032B. Includes single and multi-strand, heavy series, and solutions for specialized applications.

Oil and Gas Chain

Sapphire Series

Includes ANSI 25 through 160 and ISO 05B through 048B single and multi-strand, and select maintenance-free, and attachment solutions.