Grinding device for needle bearing machining

The utility model relates to the technical field of needle bearing machining, in particular to a grinding device for needle bearing machining, which comprises a base, a vertical groove is arranged on one side of the top end of the base, a servo motor with a vertically upward output shaft is arranged in the groove, and the top end of the output shaft of the servo motor is concentrically connected with a connecting rod. The top end of the connecting rod is concentrically connected with a driving belt wheel, a driven belt wheel is rotationally arranged on one side of the driving belt wheel at the top end of the connecting rod, and a transmission belt sleeves the outer sides of the driven belt wheel and the driving belt wheel. According to the retainer clamping device, abutting can be selectively conducted from the interior of the retainer or clamping can be selectively conducted from the exterior of the retainer, then different clamping modes can be selected according to subsequent polishing of an inner ring and