How to switch between top grinding and three-jaw chuck grinding in Shanghai cylindrical grinder

Toggle switching is a switching mode between center grinding and three-jaw chuck grinding of Shanghai cylindrical grinder. When the grinder is circular, the center does not rotate, and the workpiece is rotated by poking the lever. Only by clamping the inner hole of the workpiece with three claws for grinding can the workpiece be processed. The shifting lever can drive the workpiece to rotate, the operation is convenient and simple, the abrasion of the shifting lever mechanism to the cylindrical grinder is reduced, and the precision of grinding the workpiece with three claws is improved.