BF Series Electromagnetic Power-on Brakes

BF (Power-on)

Electromagnetic power-on brakes provide an efficient, switchable means of stopping and/or holding the load. While the field (electromagnet) assembly is fixed and prevented from rotating by a flange, the armature assembly is secured to the shaft. When the coil is energized, the armature engages the friction surface of the fixed field (electromagnet) assembly, thus stopping and/or holding the load.

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Frame Size 11 15 17 22 26 30
Frame OD, mm (in) 31.8 (1.25) 38.9 (1.53) 45.2 (1.78) 57.4 (2.26) 66.8 (2.63) 83.1 (3.27)
Static Torque, Nm (lb-in) 0.56 (5) 1.13 (10) 1.69 (15) 4.52 (40) 9.04 (80) 14.13 (125)
Coil Voltage, Vdc 24/90 24/90 24/90 24/90 24/90 24/90
Resistance, ohms 128/1800 130/1800 108/1518 75/1048 66/937 43/594
Max Power, watts 5.0 5.0 6.0 8.5 9.5 15.0
Armature
engage/disengage, ms		 5/18 8/22 10/27 12/32 15/35 18/45
Weight, kg (lb) 0.1 (0.2) 0.2 (0.4) 0.3 (0.5) 0.4 (0.9) 0.5 (1.2) 1.3 (3.0)

BF Series Highlights

  • Static or dynamic engagement 
  • English or Metric hub bores 
  • UL Class B insulation (130°C)
  • Unburnished or burnished
  • Custom coil voltages 
  • Zero backlash positioning
  • Corrosion protection plating

BF Series Applications

  • Robotics
  • Medical equipment
  • Actuators
  • Motor brakes
  • Postal handling equipment
  • Packaging