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MAGPOWR SOFSTEP® Magnetic Particle Clutches and Brakes

  • No maintenance - nothing to monitor or adjust
  • Quiet operation - no slap or squeaks
  • Energy efficient
  • Compact design
  • Fast response (no mechanical parts to move, engagement happens in milliseconds)
  • Totally enclosed housing- no wear particles to contaminate environment

PSC2-24V and PSC2-90V Clutch Specifications

  • Rated Torque2 lb-in
  • Coil Response Time8 Millisec
  • Inertia of Output Shaft8.5 x 10-4 lb-in/sec²
  • Maximum Heat Dissipation10 W
  • Maximum RPM1,800
  • Weight0.5 kg1.1 lb
  • Maximum Drag Torque Zero Excitation0.2 lb-in
  • Rated Voltage
  • PSC2-24V24 V
  • PSC2-90V90 V
  • Resistance
  • PSC2-24V72.1 Ω
  • PSC2-90V1,180 Ω
  • Rated Current
  • PSC2-24V0.3 Amps
  • PSC2-90V0.07 Amps

PSC15-24V and PSC15-90V Clutch Specifications

  • Rated Torque15 lb-in
  • Coil Response Time40 Millisec
  • Inertia of Output Shaft1.9 x 10-2 lb-in/sec²
  • Maximum Heat Dissipation20 W
  • Maximum RPM1,000
  • Weight2 kg5.3 lb
  • Maximum Drag Torque Zero Excitation0.5 lb-in
  • Rated Voltage
  • PSC15-24V24 V
  • PSC15-90V90 V
  • Resistance
  • PSC15-24V49 Ω
  • PSC15-90V803 Ω
  • Rated Current
  • PSC15-24V0.49 Amps
  • PSC15-90V0.11 Amps

PSC70-24V and PSC70-90V Clutch Specifications

  • Rated Torque70 lb-in
  • Coil Response Time105 Millisec
  • Inertia of Output Shaft1.2 x 10-1 lb-in/sec²
  • Maximum Heat Dissipation100 W
  • Maximum RPM1,000
  • Weight6 kg13 lb
  • Maximum Drag Torque Zero Excitation1.0 lb-in/sec²
  • Rated Voltage
  • PSC70-24V24 V
  • PSC70-90V90 V
  • Resistance
  • PSC70-24V53 Ω
  • PSC70-90V834 Ω
  • Rated Current
  • PSC70-24V0.41 Amps
  • PSC70-90V0.11 Amps

PSC120-24V and PSC120-90V Clutch Specifications

  • Rated Torque120 lb-in
  • Coil Response Time85 Millisec
  • Inertia of Output Shaft3.0 x 10-1 lb-in/sec²
  • Maximum Heat Dissipation140 W
  • Maximum RPM1,000
  • Weight11 kg24 lb
  • Maximum Drag Torque Zero Excitation2.0 lb-in/sec²
  • Rated Voltage
  • PSC120-24V24 V
  • PSC120-90V90 V
  • Resistance
  • PSC120-24V31 Ω
  • PSC120-90V452 Ω
  • Rated Current
  • PSC120-24V0.78 Amps
  • PSC120-90V0.20 Amps

PSB2-24V and PSB2-90V Brake Specifications

  • Rated Torque2 lb-in
  • Coil Response Time8 Millisec
  • Inertia of Output Shaft8.5 x 10-4 lb-in/sec²
  • Maximum Heat Dissipation10 W
  • Maximum RPM1,000
  • Weight0.3 kg0.6 lb
  • Maximum Drag Torque Zero Excitation0.2 lb-in
  • Rated Voltage
  • PSB2-24V24 V
  • PSB2-90V90 V
  • Resistance
  • PSB2-24V72.1 Ω
  • PSB2-90V1,180 Ω
  • Rated Current
  • PSB2-24V0.3 Amps
  • PSB2-90V0.07 Amps

PSB15-24V and PSB15-90V Brake Specifications

  • Rated Torque15 lb-in
  • Coil Response Time55 Millisec
  • Inertia of Output Shaft2.0 x 10-2 lb-in/sec²
  • Maximum Heat Dissipation20 W
  • Maximum RPM1,000
  • Weight1 kg2.25 lb
  • Maximum Drag Torque Zero Excitation0.8 lb-in
  • Rated Voltage
  • PSB15-24V24 V
  • PSB15-90V90 V
  • Resistance
  • PSB15-24V49 Ω
  • PSB15-90V803 Ω
  • Rated Current
  • PSB15-24V0.49 Amps
  • PSB15-90V0.11 Amps

PSB70-24V and PSB70-90V Brake Specifications

  • Rated Torque70 lb-in
  • Coil Response Time125 Millisec
  • Inertia of Output Shaft1.1 x 10-1 lb-in/sec²
  • Maximum Heat Dissipation100 W
  • Maximum RPM1,000
  • Weight3 kg6.5 lb
  • Maximum Drag Torque Zero Excitation1.0 lb-in
  • Rated Voltage
  • PSB70-24V24 V
  • PSB70-90V90 V
  • Resistance
  • PSB70-24V53 Ω
  • PSB70-90V834 Ω
  • Rated Current
  • PSB70-24V0.41 Amps
  • PSB70-90V0.11 Amps

PSB120-24V and PSB120-90V Brake Specifications

  • Rated Torque120 lb-in
  • Coil Response Time110 Millisec
  • Inertia of Output Shaft2.7 x 10-1 lb-in/sec²
  • Maximum Heat Dissipation140 W
  • Maximum RPM1,000
  • Weight5 kg12 lb
  • Maximum Drag Torque Zero Excitation2.0 lb-in
  • Rated Voltage
  • PSB120-24V24 V
  • PSB120-90V90 V
  • Resistance
  • PSB120-24V31 Ω
  • PSB120-90V452 Ω
  • Rated Current
  • PSB120-24V0.78 Amps
  • PSB120-90V0.20 Amps

PSB240-24V and PSB240-90V Brake Specifications

  • Rated Torque240 lb-in
  • Coil Response Time210 Millisec
  • Inertia of Output Shaft7.8 x 10-1 lb-in/sec²
  • Maximum Heat Dissipation200 W
  • Maximum RPM1,000
  • Weight5 kg12 lb
  • Maximum Drag Torque Zero Excitation4.0 lb-in
  • Rated Voltage
  • PSB240-24V24 V
  • PSB240-90V90 V
  • Resistance
  • PSB240-24V47 Ω
  • PSB240-90V687 Ω
  • Rated Current
  • PSB240-24V0.51 Amps
  • PSB240-90V0.13 Amps

Torque is the power behind tension control, but it’s useless if there’s no regulation or guidance. The original SOFSTEP brakes with MAGPOWR controls are popular throughout the industry because of the smooth controllable torque they provide for power transmission and tension applications. As the original SOFSTEP provider, MAGPOWR offers these brakes in a variety of sizes with torque ratings from 2-240 lb-in.

Utilizing the SOFSTEP brakes and clutches, you’ll have exceptional control as torque is independent of slip speed and directly proportional to input current. These controls prevent shock and torque spikes during engagement, giving you controlled acceleration of every load.

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MAGPOWR Engineers have developed software to help you select the best clutch, brake or load cell for your application. Contact us at +1.405.755.1600 to verify sizing or ask questions.

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