... to spin it, the friction between the gear and the worm holds the worm in place. This ... in which the locking feature can act as a brake for the conveyor when the motor is not ... differential, which is used on some high-performance cars and trucks. Material:carbon steel such as C45, 20CrMnTi, ... 40Cr, 42CrMo or stainless steel or copper or nylon and so on Process:Cutting, hobbing, lathe machining, grinding, ...