OPL Permanent-Magnet Mag-Particle Slip Clutch ( Torque Range: 0.27~ 3.5in-lbs / 0.03~ 0.4Nm) . Low cost slip clutch design for momentary and/ or continuous slipping. Torque is produced magnetically eliminating the possibility of high break away torque that occurs within typical friction devices. Torque is consistent over a given speed range. Units are sealed so that internal particles cannot contaminate machine likewise external particles cannot contaminate the OPLs. Units are supplied with stainless steel shafts, which can be customized to meet your needs. ( The OPR units are hollow bore mounted.)