A sprocket is a wheel with a toothed chain link that engages with a precisely pitched block on a link or cable. Sprocket is widely used in chemical industry, textile machinery, escalator, wood processing, three-dimensional parking garage, agricultural machinery, food processing, instrumentation, petroleum and other industries of mechanical transmission.

Sprocket tooth shape must ensure that the chain energy saving smooth and free to enter and exit engagement, as far as possible to reduce the impact and contact stress of the chain when meshing, and to be easy to process.

Sprocket material should ensure that the teeth have enough strength and wear resistance, so the sprocket tooth surface is generally after heat treatment, so that it reaches a certain hardness.