These motor brakes virtually eliminate wear on parts
The MagnaShear® line of motor brakes from this company includes new 460-V a.c. spring-set, electrically-released models (photo), featuring pulse-width modulation for lower heat generation and reduced energy consumption. These brakes leverage the company’s proven Oil Shear Technology to deliver precise stopping and repeatable positioning in demanding high-cycling or reversing applications. In oil-shear technology, a thin layer of automatic transmission fluid is placed between the friction disc and drive plate. When the brake engages, the fluid molecules shear to transmit torque and bring both surfaces into synchronous speed. Because the work is done within the fluid layer rather than through the friction surface, mechanical wear is nearly eliminated — and so is the need for air-gap adjustment. MagnaShear brakes require only an annual fluid change. Common applications include conveyors, cranes, hoists, winches, rail car spotters and dumpers, ship and rail car loaders, pallet returns, elevators and other severe-duty industrial environments. — Force Control Industries, Fairfield, Ohio