Introducing Maintenance-Free Magnashear® Electric Coupler Brakes
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Force Control introduces the Magnashear® electric coupler brake which feature oil shear technology to provide precise stopping and repeatable positioning, in a compact footprint. They are ideal for demanding applications where the motor is reversed each cycle or there are frequent start/stop cycles. Unique oil shear technology and multiple friction discs allow for high heat dissipation and low inertia, providing a lot of stopping power in a compact package. Aside from an annual oil change, there is no maintenance or adjustment required. They are ideal for cranes, hoists, conveyors, winches, rail car spotters and dumpers, ship and rail car loading conveyors, trippers, pallet returns, elevators and more.
Unique Design Ensures Long Service Life
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. The oil shear technology also provides a smooth “cushioned” stop which reduces shock to the drive system, further extending service life of downstream components.
MagnaShear® brakes are spring set, electrically released – 115 or 230 VAC through pulse width modulation for reduced heat and significant energy savings. An innovative Split Clamped Quill feature reduces shaft and key/keyway damage to the motor shaft associated with competitive brakes. The split quill collar tightens the quill 360 degrees around the shaft and key for superior connection.
Totally enclosed Magnashear® brakes are impervious to moisture, dirt and dust that is common in many production environments.
How Oil Shear Works
Unlike dry brakes, oil shear technology includes a layer of automatic transmission fluid between the friction 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 air gap adjustments which are a frequent maintenance item 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 86 foot-pounds are available in the coupler brake series. Magnashear® coupler 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 254/6. 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.
These proven motor brakes are totally enclosed, impervious to outside contaminants, with seal integrity for harsh and washdown environments. Their modular design allows for ease of servicing and maintenance.
