These are removable bars use to help transmit torque from machine components such as sprockets
, gears, and couplings to a shaft. The term ""key"" comes from the fact that it is used for locking a component to the shaft using a corresponding keyway. They are mainly designed using stainless steel, steel, and plated with zinc. But when you select the keystock, it should have the same material as the shaft to reduce failures. Besides, you should also factor that the key can effectively fit in the keyway on the shaft. If it does not have the right fit, it can cause the danger of hammering and damage to the shaft. Keystocks are used almost in all types of mechanical devices, from automobiles to large construction equipment. Besides, many shafts like pneumatic systems, pumps, and motors
also require shaft keylocks. The common categories of keystocks in the market include the gib key, tapered key, square keystock, rectangular keystocks, and stepped keystock.