Motor brake with minimal maintenance and no adjustment

Motor brake with minimal maintenance and no adjustment

The MagnaShear™ motor brake from Force Control Industries employs oil shear technology, providing longer service life even in demanding applications like the frequent start/stop cycles seen on conveyors, or for critical holding applications like bulk conveyor loads.motor brake

Oil shear technology transmits torque between lubricated surfaces to eliminate wear on friction surfaces. A patented fluid recirculation system dissipates heat to eliminate heat build-up. This technology is suitable for loader/unloader conveyors, rail car spotters and dumpers, ship and rail car loading conveyors, trippers and pallet return conveyors, as well as cranes, hoists, lifts, and more.

A manufacturer with MagnaShear brakes stopping their overhead cranes and hoists reported significant reductions in preventative maintenance (more than two hours per week) and elimination of $8,000 annually in service-parts expenditures for repairs and maintenance. 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 motor brake is impervious to moisture, dirt, and dust that is common in concrete block plants as well as asphalt shingle manufacturing, coal, bulk materials handling, and forest products. It provides seal integrity for harsh and washdown environments and a modular design /assembly for ease of servicing and maintenance.

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, causing the rotating surface to decelerate to a stop. 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 a 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.

MagnaShear is available to accommodate a wide range of applications. Spring set torque ratings from 3 foot-pounds to 1250 foot-pounds are available. The motor brake can be sized to the correct torque independent of the motor frame size or horsepower.

MagnaShear offers “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 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.

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