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MagnaShear® Motor Brakes combine oil shear durability with electric actuation, simple control logic and spring-set load holding. Easy to install, economical to operate, MagnaShear® motor brakes run on 115 VAC, 50 or 60 Hz.. An optional Step Down Transformer is available for other voltages. They fit a wide range of motors, including NEMA U-frame, and T-frame motors.

MagnaShear® Oil Shear Brakes are designed to dissipate the heat buildup that destroy conventional braking devices.

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Magnashear™ Electric Brakes

MSB2 MagnaShear® Motor Brake
Magnashear™ Electric Brakes

MSB4 MagnaShear® Motor Brake
Magnashear™ Electric Brakes

MSB6 MagnaShear® Motor Brake
Magnashear™ Electric Brakes

MSB7 MagnaShear® Motor Brake
Magnashear™ Electric Brakes

MSB8 MagnaShear® Motor Brake
Description N/A MagnaShear® Motor Brakes combine oil shear durability with electric actuation, simple control logic and spring-set load holding. Easy to install, economical to operate, MagnaShear® motor brakes run on 115 VAC, 50 or 60 Hz.. An optional Step Down Transformer is available for other voltages. They fit a wide range of motors, including NEMA U-frame, and T-frame motors.

MagnaShear® Oil Shear Brakes are designed to dissipate the heat buildup that destroy conventional braking devices.
Bolt Circle FAK N/A 5.875 in N/A 5.875 in7.250 in N/A 7.250 in N/A N/A
Pilot Diameter FAK N/A N/A N/A N/A 8.50 in10.50 in N/A 8.50 in10.50 in
Hub Bore FU N/A 0.625 in0.875 in N/A 0.875 in1.125 in N/A 0.875 in1.125 in1.375 in1.625 in N/A N/A
Bore Diameter FU N/A N/A N/A N/A 1.375 in1.625 in N/A 1.375 in1.625 in1.875 in
Minimum Hub Depth FAH N/A 1.00 in N/A 1.37 in N/A 1.62 in N/A N/A
Minimum Bore Depth FAH N/A N/A N/A N/A 3.00 in N/A 3.00 in
Maximum Hub Depth FAH N/A 2.19 in N/A 2.89 in N/A 4.25 in N/A N/A
Maximum Bore Depth FAH N/A N/A N/A N/A 4.38 in N/A 4.38 in
Static Brake Torque N/A 6 lb·ft8 lb·ft12 lb·ft N/A 14 lb·ft21 lb·ft33 lb·ft N/A 38 lb·ft62 lb·ft86 lb·ft100 lb·ft N/A 95 lb·ft135 lb·ft170 lb·ft N/A 100 lb·ft150 lb·ft200 lb·ft250 lb·ft
Dynamic Torque N/A 5 lb·ft7 lb·ft10 lb·ft N/A 12 lb·ft18 lb·ft28 lb·ft N/A 32 lb·ft53 lb·ft73 lb·ft85 lb·ft N/A 83 lb·ft115 lb·ft148 lb·ft N/A 86 lb·ft129 lb·ft172 lb·ft215 lb·ft
Maximum Kinatic Energy (KE) per Engagement N/A 7,975 ft·lb N/A 22,000 ft·lb N/A 26,500 ft·lb N/A 26,500 ft·lb N/A 41,500 ft·lb
Cyclic Inertia N/A 0.011 lb·ft² N/A 0.024 lb·ft² N/A 0.058 lb·ft² N/A Consult Factory (CF) N/A 0.267 lb·ft²
Oil Capacity N/A 28 fl oz N/A 40 fl oz N/A 50 fl oz N/A Consult Factory (CF) N/A 180 fl oz
Input Voltage N/A 115 VAC
Inrush Current N/A 2.5 A N/A 5.5 A N/A 6 A N/A 6 A N/A 6 A
Inrush Time N/A 0.4 s
Holding Current N/A 0.8 A N/A 1.7 A N/A 1.8 A N/A 1.8 A N/A 1.8 A
Mounting Position N/A D - Brake Down H - Horizontal U - Brake Up N/A D - Brake Down H - Horizontal U - Brake Up N/A D - Brake Down H - Horizontal U - Brake Up N/A H - Horizontal, Standard J - Horizontal, High Oil Level Z - Horizontal, Marine Duty N/A D - Vertical, Brake Down H - Horizontal, Standard J - Horizontal, High Oil Level U - Vertical, Brake Up Z - Horizontal, Marine Duty
Manual Release N/A S - Standard, None N/A R - With Manual Release S - Standard, None N/A R - With Manual Release S - Standard, None N/A A - Standard, None with Stub Shaft for Encoder B - Manual Release with Stub Shaft for Encoder R - Manual Release S - Standard, None N/A B - Manual Release with Stub Shaft for Encoder R - Manual Release
Dimensions A N/A 9.07 in N/A 10.25 in N/A 12.58 in N/A N/A
Dimensions B N/A 5.63 in N/A 6.88 in N/A 7.56 in N/A N/A
Dimensions C N/A 8.84 in N/A 10.75 in N/A 12.72 in N/A N/A
Dimensions D N/A 3.97 in N/A 5.00 in N/A 6.00 in N/A N/A
Dimensions E N/A 0.50 in N/A 0.50 in N/A 0.44 in N/A N/A
Dimensions L N/A 7.96 in N/A 9.18 in N/A 11.08 in N/A N/A
Dimensions U N/A 0.875 in N/A N/A N/A N/A
Dimensions FU N/A 7/8 in N/A N/A N/A N/A
Dimensions AK N/A 4.500 in N/A N/A N/A N/A
Dimensions FAK N/A 4.50 in N/A N/A N/A N/A
Dimensions AG N/A 7.00 in N/A N/A N/A N/A
Dimensions AA N/A 3.44 in N/A N/A N/A N/A
Dimensions AB N/A 4.04 in N/A N/A N/A N/A
Dimensions F N/A 3.44 in N/A N/A N/A N/A
Dimensions G N/A 6.78 in N/A N/A N/A N/A
Typical Applications N/A Chemical Dip Tanks Cranes and Hoists
Features N/A 115, 208, 230, 380, 460, 575 VAC electric actuating system. Brake release by energizing the coil. Excellent service and engineering support. Fail-Safe Internal surge protection Modular design/assembly for ease of servicing and maintenance. Oil Shear multiple-disc spring set braking. Proven long-life friction material for repeatable positioning. Pulse Width Modulation (PWM) Control of the brake coil to minimize heat build-up. Seal integrity for harsh and washdown environments. Smooth “cushioned” stops for reduced shock to the drive system. Spring-set Torque ratings from 6 to 1250 Ft.Lbs. Superior heat dissipation. The (3) smaller sizes uses a split-quill and hub clamp for quick & easy mounting to the motor face. The (4) larger sizes have a Quick mount Bore & key shaft connection to the motor and standard mounting to NEMA motor frames or low inertia IEC frames.
Note N/A Maximum Torque of 62 lb ft with 0.625” and 0.875” shaft. N/A Maximum Torque of 62 lb ft with 0.625” and 0.875” shaft. N/A Maximum Torque of 62 lb ft with 0.625” and 0.875” shaft. N/A N/A