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FAQs

How should you count the number of pitch in a strand of roller chain?
Someone threw me a curveball, how do I convert pitch to feet?
What is “working load” and what role does it play in selecting roller chain?
Why does Diamond's maintenance-free DURALUBE chain ship with additional external lubricant?
Our operation requires a daily cleaning that includes bleach, alcohol, and water. What type of chain would you suggest for this type of operating environment?
What is oval contour chain and how is it different from standard ANSI chain?
What are the differences between 50, 50 1R, and 50 2R roller chain?
Diamond chains sometimes seem like they are over-lubed compared to other chain manufacturers. Why is that?
Should DURALUBE series chain be lubricated after it is installed?
Does Heavy Series chain require different sprockets?
Does double-pitch roller chain require different sprockets?
Is there a proper way to store roller chain when it’s not being used? We use ANSI 50 and 60 roller chain on a fertilizer roller for about three weeks out of the year. We’ve been removing the chain and storing it in diesel fuel, but the links are starting to get stiff.
How does Diamond Chain mark the links on their products? I want to make sure I’m getting “the real McCoy” and not an inferior chain.
What is the smallest suggested sprocket size to minimize the effects of chordal action?
What is the recommended minimum chain wrap in a roller chain drive?
When are hardened tooth sprockets recommended?
Roller chain is not operating smoothly. The chain appears to be climbing the sprocket teeth.
The chain does not travel smoothly during operation. Marks appear on the interior of the inner linkplates. Why?
What type of lubrication is recommended at various ambient temperatures?
In what application would forced or circulated (Type C) type lubrication be most appropriate?
In what application would bath (Type B) type lubrication be most appropriate?
In what application would drip (Type A) type lubrication be most appropriate?
A chain failed in service. Inspection of the failure revealed a bent or broken pin, or pins that appear to be turned within the outer (pin) link plates. Why?
A roller chain failed in service and upon inspection of the failure it was determined to be a "crack" in an inner (roller) plate. Why did this happen?
What is a roller chain roller link?
What is a roller chain offset link?
What is a roller chain connecting link used for and what is its impact on the chain's load capacity?
What is the tensile strength and load rating for Diamond's ANSI 60 and ANSI 60 Heavy roller chain?
What is meant by "pre-stretching" or "pre-loading" roller chain, why is it done, and is it important?
How can the wear in a roller chain be accurately measured and when is the chain considered worn out?
How is proper chain tension measured and why is it important?
What is the difference between slip-fit center plate- and press-fit center plate-type multiple strand chain?
What is roller chain length matching and why is it used?
What is the difference between riveted and cottered chain?
What are the temperature limitations of Diamond roller chain?
Why is my chain "stretching," or elongating, too quickly?
My roller chain is rusting in service. What should I do?
Will the typical chain breaker (pin extractor) break multiple strand roller chain?
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?
Do the Diamond Chain connecting tools work for multiple strand roller chains?
How is the drive ratio of a roller chain drive calculated and what is the maximum recommended single reduction?

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