DID 60 standard roller chain - Big Bike Webshop

Glossary
Terms such as average tensile strength, minimum tensile strength, maximum allowable tension, and table of
maximum horsepower ratings are important terms that indicate the performance of chains, and are often
used in the text and table of chain dimensions in this catalog. Frequently used terms are explained below.
1. Average tensile strength
We conduct a test where a chain is pulled at both ends with a gradually increasing load until it breaks.
The maximum load in this case is called the tensile strength of the chain. The average tensile strength is
obtained by repeating this test. Since the average tensile strength is not a guaranteed value, it cannot be
used for calculation of safety factor.
2. DID minimum tensile strength
This is our guaranteed tensile strength. Therefore, our chains all have tensile strengths exceeding this
value. Use it for strength calculations such as to obtain safety factor. This value is decided on the
conservative side, based on statistical processing of numerous tensile strength data and experience.
3. JIS minimum tensile strength
This is the strength value required for a chain conforming to JIS B 1801.
Since our factory is authorized to use the JIS mark, the minimum tensile strengths of all DID chains
exceed JIS minimum tensile strengths.
4. Maximum allowable tension
"Slow-speed selection" (see P121) is a method for selecting chains that uses the maximum allowable
tension for the criterion of safety. The maximum allowable tension is decided on the more conservative
side than the fatigue limit. Fatigue fracture will not occur if a load less than this value is repeatedly
applied.
5. Table of maximum horesepower ratings
A chain is usually selected according to the "General selection" method (see P120) which uses the
maximum horsepower rating for the criterion of safety. As shown on P120, the maximum horsepower
rating shows the power which can be transmitted when the chain is operated under an ideal condition.
The maximum horsepower ratings were obtained by actually operating chains in a test facility under good
lubrication condition without vibration or shock.
Technical Data
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