Perma-Tork® Permanent Magnet Clutches and Brakes Design Features No external power is required to produce highly accurate, dependable torques. As the center disc rotates, lines of magnetic force retard its motion. The amount of retarding force is adjusted by rotating a large knurled adjustment ring. Repeatability and accuracy is excellent. With the housing fixed, a hysteresis clutch or magnetic particle brake functions as a constant torque brake. When a stub shaft adapter is mounted to the housing, the hysteresis clutch can be used as a torque limiter for inline applications. Virtually eliminates the "stick-slip" phenomenon associated with friction devices Long life. The only wearing parts are the ball bearings Features and Benefits Fast, precise torque adjustment Torque is set with a large knurled adjustment ring Infinite adjustability between minimum and maximum settings. This allows units to be fine tuned to your unique requirements Constant torque You can solve most torque problems by using either the hysteresis or magnetic particle unit No external control or power source Simple to install Dependable performance Extremely accurate. The hysteresis models outperform other devices at low RPM Versatile mounting: easy to retrofit Clutches are available with hollow bores for mounting on motor shafts or jack shafts Stub shaft adapters are available for inline applications Bolt circles allow for fixed mounting, adding a pulley, or stub shaft adapters Brakes are available with solid shaft inputs Nothing to monitor Permanent Magnet Clutches & Brakes 147 Permanent Magnet Clutches & Brakes MAGPOWR clutches and brakes are available in three types; Pneumatic, Hysteresis and Magnetic Particle. Hysteresis and Magnetic Particle units provide constant torque independent of slip speed and are popular in light tensioning applications. Hysteresis units offer excellent overload and jam protection for all drive train components. Hysteresis units also provide soft starts with zero slip until a preset torque is reached. PERMA-TORK Permanent Magnet Clutches and Brakes do not require maintenance and provide extremely long life.