Press fitting tool for ball bearing

The utility model relates to a press fitting tool of a ball bearing, which is used for press fitting configuration between a shaft part with an inner hole and the ball bearing, and comprises a base, a positioning seat fixed on the base, a core shaft capable of moving up and down and arranged on the positioning seat, and an elastic reset structure, and the upper end of the positioning seat is provided with a positioning groove cavity matched with the ball bearing. The positioning groove cavity is used for installing the ball bearing, the mandrel vertically penetrates through the positioning groove cavity, the mandrel and an inner ring of the ball bearing installed in the positioning groove cavity are coaxial, the mandrel comprises a small positioning shaft section at the top and a large positioning shaft section located on the lower side of the small positioning shaft section, the small positioning shaft section is sleeved with an inner hole of the shaft part, and the small positioning shaft section and the la