In the same dimensions, the L type for use in braking, H type for use in braking and holding and S type for use in holding are available. No running-in required. Torque satisfies rated value right from the beginning of use. A stator used as a heat source can be mounted either on the inside or outside direction in accordance with the intended use. The anti-noise spring reduces a clattering sound generated by fine vibration during rotations. It corresponds to the Restriction of Hazardous Substances that bans the use of 6 substances such as mercury or lead.