Tool for machine tool spindle box point grinding

The utility model relates to a tool for grinding points of a machine tool spindle box. The tool comprises a rotating part, a reference part and a force application part. And the annular lower end surface of the rotating part is used for lapping points on the mounting plane of the main shaft. And the reference part is cylindrical, is connected to the lower part of the rotating part and is used forextending into the main shaft mounting hole for axial positioning. The normal of the lower end face of the rotating part is parallel to the axis of the reference part, and perpendicularity of the lower end face of the rotating part and the spindle hole is guaranteed. And the rotating part has a certain thickness to prevent the rotating part from deforming, so that the flatness of the rotating partis ensured. When the main shaft is assembled, the main shaft does not need to be hoisted for grinding, only the reference part of the tool needs to be inserted into the main shaft mounting hole, therotating part is rotated th