Adopt advanced helical rolling flow and ternary vibration principles to make a part and grinding tool grind to each other.Applied for finishing and machining of large lot medium or small parts, 6 times of original operation efficiency. No damages to original sizes or shapes of parts during the machining process.Realize the automatic work without persons, convenient in operation, random spot checks to parts during the machining process.This machine's separating area complete with manual unloading flap and screen separator, which can operate easily.This selector gear can separate media and work piece independently, which could save the cost and the working time.