The MagnaShear hazardous duty brakes use oil shear technology to provide longer service life with virtually no maintenance or adjustment. These brakes now meet Class I and Class II Div. 2 specifications (Div. 1 in process with approval forthcoming). With spring set torque ratings from 3 to 900 ft-lb available, these motor brakes can be sized to the correct torque independent of the motor frame size or horsepower. They also feature “quick mount” features for quick and easy mounting to drive motors in NEMA frame sizes 56 to 405.
These motor brakes are totally enclosed from outside contaminants, with seal integrity for harsh and washdown environments. A modular design/assembly allows for ease of servicing and maintenance. They suit applications where the motor is reversed each cycle, such as cranes, winches and hoists, as well as ship and railcar loader/unloader conveyors, tippers, sweep samplers and more.
Proven oil shear technology transmits torque between lubricated surfaces—thereby eliminating wear on friction surfaces, providing longer service life with no maintenance or adjustment. A patented fluid recirculation system dissipates heat—eliminating heat build-up, which is the most common problem in dry braking systems.
The oil shear technology also provides a smooth “cushioned” stop, which reduces shock to the drive system, further extending service life of downstream components.
The totally enclosed MagnaShear brakes are impervious to moisture, dirt and dust that are common in coal prep plants as well as the bulk handling of coal, aggregates and more.
Unlike dry brakes, oil shear technology includes a layer of automatic transmission fluid between the brake disc and the drive plate. As the fluid is compressed, the fluid molecules shear—thus imparting torque to the other side. This torque transmission causes the stationary surface to turn, bringing it up to the same relative speed as the moving surface. Since most of the work is done by the fluid particles in shear, wear is virtually eliminated. Elimination of wear also eliminates the need for adjustments common for dry braking systems.
In addition to transmitting torque, a patented fluid recirculation system helps to dissipate heat.
Along with heat removal and torque transmission, the fluid serves to continually lubricate all components of the oil shear brake, elongating their service life.
MagnaShear motor brakes can be furnished to fit a NEMA or IEC frame motor, as a complete motor and brake assembly, or to mount on a machine frame or other special mounting configuration.
Force Control Industries
Filed Under: TECHNOLOGIES + PRODUCTS, Automation components