Product Description:

The B-604-C-31-B3 is a servo motor produced by Kollmorgen within the Goldline B and BH Motors series. It is intended for closed-loop industrial automation where precise torque delivery over a wide speed range is required; the model converts electrical power from a matched drive into mechanical rotation for positioning or velocity control on machinery axes. Designed for demanding motion loops, this motor integrates an electromagnetic brake and a low-inertia rotor so machine builders can achieve rapid index moves while still holding loads safely when power is removed.

At stall, the motor can sustain 31.2 N-m of continuous torque while drawing 39.4 Arms of continuous current from the drive. The motor has a 0.792 N-m/Arms torque constant, so every ampere contributes nearly 0.8 N-m. For quick accelerations, the design allows a short-duration output of 86.4 N-m peak torque that coincides with 114.8 Arms peak current, permitting rapid cycle moves before the average heating limit is reached. Under rated running conditions, the shaft delivers 19.1 N-m at 8.6 kW. The 3.3 mH phase inductance smooths current ripple, and the 0.13 Ω line-to-line resistance limits conduction losses when the axis is idle.

The brake assembly provides 48 N-m of static holding torque and engages whenever the supply of 24 VDC is removed, locking the shaft through a spring-applied mechanism that releases at only 1.27 A of coil current. Because the brake adds 0.000127 kg·m² to the reflected load, its contribution to total inertia remains small compared with the 0.00203 kg·m² rotor, preserving dynamic response. The drive sees a 47.89 Vrms/kRPM back-EMF constant, which helps predict voltage demand across the intended speed band. The low rotor inertia and modest brake inertia support tight velocity loops and stable load holding on vertical axes without external clamps.