Residential Electric Door and Gate Operators Commercial-Industrial Trolley type-ceilling, Wall Mounts, B1-Parting, Sliding Doors Electric Operators Waterproof Trolley Type-Ceillling and Jack-Shaft-Wall Mount Explosion-proof Trolley Type-Ceillling and Jack-Shaft-Wall Mount Sliding Gate Electric Operators Swing Gate Electric Operators Trafic control barriers To control of vehicular traffic in private and public parking areas. Rolling &Fire Doors Rolling Service Doors & Fire Doors. Jack Shaft - Wall Mount Accessories Different accessories for your needs Safety Devices Reverse Systems and Sensor Entry-Exit Devices Loop Detectors, Card Reader and more Operating Controls   Modifications   Special applications   Torque Limiter This adjustable, torque limiter can be used with any of our electric operator models that have a worm gear reducer as primary reduction system. It consists of a steel hub with two 4" diameter clutch plates, A50B23, or 60B23 sprockets, two 4" diameter asbestos fiber friction discs, and spring washer with pressure cup. Holding force is from 25 lbs. to 1500 lbs. Can be adjusted in the field as required depending on door weight. Torque limiter will protect door/gate and operator in case of obstruction. Synchronized limit drive assembly will not go out-of-adjustment when torque limiter is activated. Part No. 50170 ¾HP up to 2HP motor Part No. 50175 3HP motor