SUNPASS inner ring chamfering machine is mainly used for the chamfering of the inner ring of the winding gasket, and the advance and retreat of the gasket is controlled by the air pump; no expensive lathe is needed, which reduces the cost of construction and maintenance; the Sunpass inner ring chamfering machine can operate multiple sets by one worker equipment, improve the utilization rate of equipment, and reduce labor costs; the improved inner ring chamfering machine changes the traditional vertical type into a horizontal operation table, which reduces the difficulty for workers to replace products, and can monitor the quality of chamfering in real time; The blade and cutting mode can realize the dual functions of inner ring chamfering and outer ring groove milling, which can be selected for production in small-scale enterprises to realize one machine with multiple functions.