Type CU, DC Magnetic Disc Brakes

(Nuclear Industry)


CX Series DC Magnet Disc Brakes


CX Series DC Magnet Disc Brake

Spring Set DC Magnet Released Disc Brakes

– Service Duty (Type CU) and Emergency Stop Duty (Type CX) DC Magnet Disc Brakes


  • Metric, foot mounted


  • Fabricated steel mechanism
  • All pins ground stainless steel
  • Friction linings, high temperature non asbestos


  • Service brake self adjusting device(compensates for brake lining wear)
  • Limit switches to monitor release / set or wear
  • Special materials, tests and finishes as required;
  • High integrity requirements such as the nuclear industry


  • Separate enclosed control units for DC or AC supplies
  • Economy circuits available
  • Shunt or series magnets available


  • Mechanical handling equipment, cranes, winches,conveyors and mills etc.
  • Emergency stop brakes often installed on flange of crane winding drum


  • Design and selection assistance available



DIA. “D” (1)





mm(in) kN(Lb) mm(in) kg(lb)
CU01 250-400(9.8-15.7) 3.6(809) 50(2) 30(66)
CU1 315-500(12.4-19.7) 6.1(1370) 60(2.36) 50(110)
CU2 400-710(15.7-27.9) 16.4(3690) 86(3.4) 142(313)
CU3 500-800(19.7-31.5) 37.9(8520) 120(4.7) 230(507)
CU4 630-800(24.8-31.5) 54.0(12100) 120(4.7) 292(644)
CX10 380-600(15-23.6) 25(5620) 60(2.36) 89(196)
CX20 450-710(17.7-27.9) 50(11200) 75(2.95) 102(225)
CX40 500-800(19.7-31.5) 100(22500) 90(3.5) 157(346)
CX60 600-960(23.6-37.8) 150(33700) 114(4.5) 280(617)
CX90 960-1500(37.8-59) 225(50600) 134(5.27) 440(970)
CX135 – details on application

Magnetic Actuator:

Short stroke DC tractive type with encapsulated coil and screw-off release nut with optional switch. All fabricated steel construction.
  • Resin encapsulated coil with Class F insulation
  • Optional replaceable coil arrangement for CX range
  • 100% continuously rated up to +40°C ambient
  • Air gap dust and drip protected by neoprene gaiter
  • Terminal box IP55 enclosure


All DC magnets tend to inherently slow response due to build up and decay of the magnetic field. The actual times are dependent on size and vary with excitation voltage, coil temperature and spring loading (torque) and also the magnet stroke which increases as brake linings wear.

Coil Forcing:

(Shunt Wound Voltage Operated)

All CU & CX Range brakes are forced open by electric current creating a magnetic field. Brake release and set times are reduced by a separate brake control unit to apply increased power magnetic force during a short preset start period . Control units are enclosed ventilated drip proof IP22 for DC supplies or totally enclosed IP55 with rectifier for 1 or 3 phase AC supplies.

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