The MagnaShear motor brake from Force Control Industries employ oil shear technology, providing longer service life even in demanding applications like the frequent start/stop cycles seen on cranes, hoists, winches, conveyors, and other material-handling equipment. Proven oil shear technology transmits torque between lubricated surfaces – thereby eliminating wear on friction surfaces. A patented fluid recirculation 
system dissipates heat – eliminating heat build-up which is the most common problem in dry braking systems. Elimination of the wear significantly increases service life and virtually eliminates adjustment which also elongates maintenance intervals. An anodizing plant cut preventative maintenance by 2 hours per week and eliminated $8000 in annual parts expenditures by switching from dry brakes to MagnaShear motor brakes. They are suitable for applications where the motor is reversed each cycle such as cranes, winches, and hoists, as well as loader/unloader conveyors, rail car spotters and dumpers, ship and rail car loading conveyors, trippers and pallet return conveyors.
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 is common in concrete block plants as well as asphalt shingle manufacturing, coal, bulk materials handling, forest products manufacturing, and more.
How oil shear works
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 which are common for dry braking systems.
In addition to transmitting torque, a patented fluid recirculation system helps to dissipate heat which is the major problem with traditional dry brakes.
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 brakes with oil shear technology provide significantly longer service life, characterized by virtually maintenance-free operations.
Suitable for a wide range of motor sizes
These proven motor brakes are available to accommodate a wide range of applications. Spring set torque ratings from 3 to 1250 ft-lb are available. MagnaShear motor brakes can be sized to the correct torque independent of the motor frame size or horsepower.
MagnaShear motor brakes feature “quick mount” features for quick and easy mounting to drive motors in NEMA frame sizes 56 to 449. They are shipped ready to install, with no assembly or adjustments required. They are also available pre-mounted on a motor for severe duty applications. 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.
These proven 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.
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Filed Under: Brakes • clutches
