1. Three Basic Dimensions
Pitch, Roller Diameter and Inner Width are known as the “Three Basic Sizes of Roller Chain.” When these three measurements are similar, roller chains and sprockets are dimensionally compatible.

2. Basic Parts
Link Plate
The plate may be the component that bears the strain placed on the chain. Generally that is a repeated loading, sometimes accompanied by shock. Therefore, the plate must not only possess great static tensile power, it must also endure to the dynamic forces of load and shock.

Pin
The pin is subject to shearing and bending forces transmitted by the plate. Simultaneously, it forms a load-bearing part (alongside the bush) when the chain flexes during sprocket engagement. Therefore, the pin needs high tensile and shear strength, level of resistance to bending, and must have sufficient endurance against shock and put on.

Bush
The bush is subject to complex forces from all parts, especially from the repetition of shock loads when the chain engages the sprocket. For that reason, the bush needs incredibly high shock resistance. Furthermore, the bush forms a load-bearing part alongside the pin and therefore requires great wear level of resistance.

Roller
The roller is at the mercy of impact load since it mates with the sprocket teeth during engagement of the chain with the sprocket. After engagement, the roller changes its point of contact and stability. It is held between your sprocket the teeth and bush, and progresses the tooth encounter while getting a compression load. Therefore, it should be resistant to wear and still have strength against shock, exhaustion and compression. (RS25 and RS35 are bush chains and don’t have rollers).

Roller Link
Two Drive Chain bushes are press fit into two roller hyperlink plates and rollers are inserted to permit rotation around the exterior of the bushes during operation. This is actually the same for one and for multi strand chains.

Pin Hyperlink and Intermediate Plate
The pin link includes two pins that have been press fit into two pin link plates. In case of multi-strand roller chain up till size 08B, an intermediate plate is definitely added to the pin link. In the event of multistrand roller chain above size 08B, two intermediate plates are added to the pin hyperlink. The intermediate plates are slide fit for regular roller chain and press fit for Extremely roller chain.