Product Description:

The B-404-C-21-B3-034 is a brushless servo motor manufactured by Kollmorgen and included in the Kollmorgen Goldline B and BH Motors series. It is intended for closed-loop motion systems that require accurate rotary output for positioning tables, gantries, packaging axes, and similar automated equipment. The motor converts controlled electrical input into repeatable shaft motion while supporting stable speed and position regulation through a compatible servo drive. An integral electromagnetic brake is included to hold the load when power is removed, which is useful on axes that must remain in place during a stop.

At the electrical level, the motor has a back electromotive force constant of 40.2 Vrms/kRPM, which indicates the voltage generated in relation to speed. Under rated operating conditions, it can deliver 5400 W of mechanical output and 10.31 N-m of continuous torque for sustained running duty. When the shaft is locked at zero speed, the windings can carry a continuous stall current of 19.8 Arms and produce a continuous stall torque of 13.1 N-m, making the motor suitable for applications that require steady holding force under control. The DC resistance is 0.34 Ω, which affects copper loss, and the 8.4 mH phase inductance influences current response in the drive. Rotor inertia is 0.000656 kg-m², giving the motor a balance of responsive acceleration and stable speed behavior.

For short-duration overloads, the motor can accept a peak stall current of 55.9 Arms and produce a peak stall torque of 35.3 N-m, which helps during acceleration, breakout, or other brief high-load events. The integrated brake engages on 24 VDC, draws 0.93 A, and provides 8.0 N-m of holding torque while adding only 0.0000586 kg-m² of extra inertia. Its torque constant of 0.66 N-m/Arms gives a direct relationship between commanded current and produced torque, which supports predictable control response. This combination of continuous capability, short-term overload capacity, and built-in holding brake makes the motor suitable for controlled motion tasks that need both dynamic performance and load retention.