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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.
Unit of Measure

Specifications

Pilot Diameter FAK

N/A 16.00 in

Bore Diameter FU

N/A 1.875 in2.125 in2.375 in2.625 in2.875 in3.125 in3.375 in3.500 in3.625 in

Minimum Bore Depth FAH

N/A 3.00 in

Maximum Bore Depth FAH

N/A 5.12 in

Static Brake Torque

N/A 625 lb·ft950 lb·ft1250 lb·ft

Dynamic Torque

N/A 538 lb·ft817 lb·ft1075 lb·ft

Maximum Kinatic Energy (KE) per Engagement

N/A 158,000 ft·lb

Cyclic Inertia

N/A 158,000 lb·ft²

Oil Capacity

N/A 384 fl oz

Input Voltage

N/A 115 VAC

Inrush Current

N/A 8 A

Inrush Time

N/A 1.4 s

Holding Current

N/A 2.5 A

Mounting Position

N/A H - Horizontal, Standard J - Horizontal, High Oil Level Z - Horizontal, Marine Duty

Manual Release

N/A B - Manual Release with Stub Shaft for Encoder R - Manual Release

Typical Applications

N/A Chemical Dip Tanks Cranes and Hoists

Features

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

Note

N/A Maximum Torque of 625 lb ft with 1.875” shaft.
Maximum Torque of 950 lb ft with 2.125” & 2.375” shaft.