1. The tooth profile of the sprocket

The tooth profile of the sprocket must ensure that the chain enters and exits the mesh smoothly and freely, minimizes the impact and contact stress of the chain link during meshing, and is easy to process.It is composed of three arcs aa, ab, cd and a straight line bc, referred to as three arc-straight tooth profile.

2. Sprocket structure

Small-diameter sprockets are generally made of integral type, and medium-diameter sprockets are mostly made of spoke type. In order to facilitate handling, installation and weight reduction, holes are opened in the spoke plate. Large diameter sprockets can be made into a combined type. The ring and the wheel core can be made of different materials.

3. Sprocket material

The sprocket material should ensure that the gear teeth have sufficient strength and wear resistance, so the sprocket tooth surface is usually heat treated to make it reach a certain hardness.