Ball grinder of stable performance

The utility model discloses a ball grinder of stable performance, the on -line screen storage device comprises a base, be equipped with damping device on the base, damping device's top is equipped with the supporting seat, be equipped with the bracing piece between the supporting seat, supporting seat one side is equipped with the motor, be equipped with the supporting shoe on the bracing piece, the fixed staving that is equipped with on the supporting shoe, the fixed connecting block that is equipped with in both sides of staving, be equipped with the connecting seat on the supporting seat, fixedly on the connecting seat be equipped with the main shaft with connecting seat matched with, and the main shaft runs through the connecting block of staving both sides and extends to the both sides of connecting block. This ball grinder of stable performance through the rotary rod that sets up, the steel ball that sets up, makes the steel ball move on the rotary rod on the rotary rod on the main shaft to staving insi