Introduction to Chain
Chain can be divided into categories depending on its construction and function it is used for.
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 Roller chain Suitable for thousands of applications. Roller chain is also known as Transmission or Drive Chain.  | 
 Special Chain Chain that differs from standard chain either because of a material, coating or attachment.  | 
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 Conveyor chain  | 
 Leaf chain  | 
Component Parts of a Roller Chain
Each roller chain is made up of the same key components. The diagram above shows how they fit together to make the chain.
Normally only 3 measurements are needed to identify a chain:
- (a) Pitch
 - (b) Width between inner plates
 - (c) Roller diameter