Electromagnetic clutch, as its name implies, is a device that uses the electromagnetic force generated by electrification of the coil to carry out mechanical connection, disconnect, brake and hold. According to its working method, it can be divided into excitation type and non-excitation type. The excitation type is the clutch brake that works by electrified the coil, while the non-excitation type is the brake that works by spring force when the power is cut off. The product groups of MIKI PULLEY electromagnetic Clutch/brake can be roughly divided into "excited clutch/brake", "non-excited brake", "electromagnetic gear clutch", "brake motor", "Electromagnetic clutch/power brake supply device" and so on. In particular, the excitation clutch brake is equipped with modules and other products that combine functions according to the size of the transmission torque.