Eccentric workpiece is the workpiece whose outer circle and outer circle or outer circle are parallel to the axis of Du inner hole but not coincide, and deviate one distance. The distance between these two parallel axes is called eccentricity. The parts with eccentric outer circle and outer circle are called eccentric shaft or eccentric disc; the parts with eccentric outer circle and inner hole are called eccentric sleeve.

Principle: eccentric shaft when the circle does not rotate around its center, it becomes an eccentric wheel. Eccentric shaft is also a kind of cam. Generally speaking, the main purpose of eccentric wheel is to produce vibration, such as electric sieve. The vibrator in mobile phone uses eccentric wheel, most of which are round wheel, because the round wheel is easy to manufacture and simple to process.