The CNC handwheel is essentially a kind of rotary encoder. It is used on CNC machine control panel or manual pulse generator. The dimension of the CNC handwheel is standard in international: 60mm and 80mm. This CNC handwheel is the 60mm outer diameter type. It has the same function as the rotary encoder to control the motion of the CNC machine tools. Along with the rotation of the wheel, the woking piece will move upward or downward accordingly.