Global Brake Specifications Model lb-ft GBA GBA-AIR GBB GBB-AIR GBC GBC-AIR GBD GBD-AIR GBE GBE-AIR GBF GBF-AIR Heat NonInertia (WR2) Dissipation Excited of Rotating at 1800 rpm Drag Torque Members of Outer Member Nm lb-ft Nm lb-ft2 kg-m2 (Watts) Rated Torque 5.5 7.5 11 14.9 26 35.2 56 75.9 100 135 325 441 88 295 85 351 155 556 195 657 320 1230 595 1930 0.07 0.09 0.013 .00055 0.07 0.09 0.030 0.0013 0.23 0.31 0.08 0.0034 0.56 0.76 0.30 0.013 1.3 1.76 0.33 0.014 3.3 4.47 1.97 0.083 Weight lb kg 11 5 14 7 15 7 17 8 25 11 28 13 38 17 42 19 75 34 86 39 180 81.6 191 86.6 Coil Data (90 VDC) Coil Data (24 VDC) Time Constant (Seconds) 90 & 24 VDC Rated Current Ω@ 20˚C Rated Current Ω@ Current Torque 20˚C 0.16 361 0.67 20.8 0.06 0.22 0.21 278 0.89 15.7 0.09 0.18 0.32 186 1.11 13.2 0.10 0.28 0.39 150 1.42 10.2 0.16 0.36 0.45 129 1.46 9.9 0.56 1.38 0.53 111 1.61 9.21 1.12 1.88 Typical Torque vs. Current (90 VDC and 24 VDC Models) Magnetic Particle Clutches & Brakes Non excited drag torque and torque time constant measured at 1800 rpm. Minimum recommended rpm is 10 rpm. Axis of shafts must lie within 30˚ of horizontal. Non excited drag torque values represent a typical unit after a few minutes of use. Drag torque in a new, unused unit may initially be higher. The time in seconds for current or torque to reach 63% of the final value after step function voltage is applied. "Rated current" is the current which will occur from a 90 VDC input to the clutch when the unit is operated at its rated temperature (maximum heat dissipation). Magnetic Particle Clutches & Brakes 119