A sprocket is a kind of cog-type sprocket wheel used to mesh with a block with a precise pitch on a link chain or cable. The sprocket material should ensure that the gear teeth have sufficient strength and wear resistance. Therefore, the sprocket teeth are generally heat treated to achieve a certain hardness. Sprockets are widely used in mechanical transmission in industries such as chemical industry, textile machinery, escalators, wood processing, three-dimensional parking garages, agricultural machinery, food processing, instrumentation, petroleum, etc.