Three - claw - pulling is a tool often used in mechanical maintenance. Mainly used to remove damaged bearings from the shaft along the axial direction. It is mainly composed of a handle, a screw and a puller. There are two and three claws, the main size is the length of the pulling claw, the distance between the pulling claw, the length of the screw, to adapt to different diameters and different coaxial mounting depth of the bearing. When in use, the screw center is positioned at the center hole of the shaft end to adjust the position of the pull-jaw, so that the pull-jaw is hooked to the outer ring of the bearing.