Chain sprockets are metal wheels with teeth used to engage the rollers of the drive chain. One of the main characteristics of chain sprockets is the number of teeth. Depending on the gear ratio, you need to choose the number of teeth of a smaller chain sprocket. Also, chain sprockets are single-row, double-row, three-row, with special elements of an alternation. There is also a division of chain sprockets into prefabricated and solid. Prefabricated chain sprockets can be with a split sleeve or with a plug-in sleeve.
The profile of chain sprockets in the cross-section depends on the number of rows of the chain.
In roller chains, the engagement of the chain with a chain sprocket is carried out using a roller that reduces tooth wear by rolling over it.
Chain sprockets are made of wear-resistant, high-strength materials with the use of hardening, cementation, and thermal improvement.
Most often it is alloy, medium carbon, carbon, stainless, cemented steel; foundry, gray, modified cast iron.