Portable magnetic disk seat hole dilating drill

The utility model relates to a hole enlarging machine of a movable disc seat which is characterized in that an electric head and a main shaft are in threaded connection, thread rods of the two sides of the main shaft are sleeved with end covers. The inners of the end cover are respectively equipped with a bearing, between the two end covers a muffle is provided, the muffle is sleeved in the main shaft and the outer of the muffle is sleeved with a support, the other end of the support is arranged with a strong magnet, and the front end of the main shaft is connected with a knife head. The utility model employs the strong magnet. In using time, the strong magnet can be used to fix the hole enlarging machine on the equipment and adjust the preset position for processing. The whole support has a better function in locating, and the electric head drives the knife head on the main shaft to process to reduce the vibrating greatly. Thereby hole enlarge precision of the utility model can be provided, processing or refinishing precision of the equipment can be improved, and the utility model can be utilized broadly.