Mechanical parts are the basic components of machinery, is composed of machinery and machine can not be detachable single parts. Include:

1. Connection of spare parts. Such as thread connection, wedge connection, pin connection, key connection, spline connection, interference fit connection, elastic ring connection, riveting, welding and bonding, etc.
2. 2.Transmission of motion and energy belt drive, friction wheel drive, key drive, harmonic drive, gear drive, rope drive and screw drive and other mechanical transmission, as well as drive shaft, coupling, clutch and brake and other corresponding shafting parts.
3. Supporting parts, such as bearings, boxes and frames, etc.
4. Lubrication system and seal, etc.
5. Spring and other parts.