1. Three Basic Dimensions
Pitch, Drive Chain Roller Diameter and Inner Width are referred to 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 is the component that bears the tension positioned on the chain. Usually this is a repeated loading, occasionally accompanied by shock. Therefore, the plate must not only have great static tensile strength, it must also endure to the powerful 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 power, resistance to bending, and must have sufficient endurance against shock and wear.

Bush
The bush is subject to complex forces from all parts, especially from the repetition of shock loads when the chain engages the sprocket. Therefore, the bush needs incredibly high shock resistance. In addition, the bush forms a load-bearing part together with the pin and therefore requires great wear 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 stage of contact and stability. It is held between the sprocket teeth and bush, and progresses the tooth encounter while getting a compression load. Therefore, it should be resistant to put on and still have power against shock, fatigue and compression. (RS25 and RS35 are bush chains and don’t have rollers).

Roller Link
Two bushes are press match two roller hyperlink plates and rollers are inserted to permit rotation around the outside of the bushes during operation. This is the same for single and for multi strand chains.

Pin Link and Intermediate Plate
The pin link consists of two pins which have been press fit into two pin hyperlink plates. In case of multi-strand roller chain up till size 08B, an intermediate plate is certainly added to the pin link. In case of multistrand roller chain above size 08B, two intermediate plates are added to the pin hyperlink. The intermediate plates are slip fit for regular roller chain and press match for SUPER roller chain.