B-404-C-21 Kollmorgen
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The Kollmorgen B-404-C-21 is part of the Goldline B and BH Motors series and has a rated power of 5.4 kW with a maximum speed of 5000 RPM. It provides a continuous stall torque of 13.1 Newton-meters and peak stall torque of 24.1 Newton-meters. The motor features a face square of 115 mm and a shaft diameter of 24 mm.
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Product Description:
The B-404-C-21 is a brushless servo motor manufactured by Kollmorgen within the Goldline B and BH Motors series. It provides rotary actuation for positioning tables, conveyors, and other motion axes in automated equipment. The motor has a 115 mm face square frame, while a 110 mm pilot diameter and a 130 mm mounting bolt circle align the flange to standard gearboxes or machine plates. A 24 mm diameter shaft that extends 20 mm beyond the face transfers torque directly to couplings or pulleys.
The motor can sustain 13.1 N·m of stall torque without exceeding its thermal limits, allowing heavy loads to remain locked in position under servo control. At rated speed, the shaft can deliver 5.4 kW of mechanical power, supporting rapid throughput in high-cycle machinery. A back electromotive force constant of 40.2 VRMS/kRPM must be matched by the drive so that generated voltage stays within the inverter’s DC bus range. The rotor may spin up to 5000 RPM, above which bearing life and insulation stress are not guaranteed. Current-loop design is simplified by the 0.66 N·m/Arms torque coefficient, while a phase-to-phase resistance of 0.34 Ω contributes to steady-state copper losses.
Short-duration overloads are handled by a peak stall capability of 24.1 N·m, giving the axis reserve torque for acceleration spikes or external shocks. Acceleration response is aided by a rotor inertia of 0.000656 kg·m², which permits quick speed changes without causing servo instability when coupled to moderate load inertias. The winding’s line-to-line inductance of 8.4 mH limits di/dt, so the drive must supply adequate voltage during fast current transitions. For thermal protection, an embedded switch changes state at 132 °C and changes state again near 170 °C. This thermal device helps protect the insulation and magnet materials during overload conditions.
Frequently Asked Questions about B-404-C-21:
Q: What is the maximum operating speed of the B-404-C-21 motor?
A: The B-404-C-21 has a maximum speed of 5000 RPM, supporting high-speed motion applications.
Q: What is the continuous stall torque of the B-404-C-21 motor?
A: This motor delivers a continuous stall torque of 13.1 N-m for sustained load requirements.
Q: What is the rated power of the B-404-C-21 servo motor?
A: The rated power output of the B-404-C-21 is 5.4 kW, allowing for substantial energy delivery during operation.
Q: What are the shaft dimensions of the B-404-C-21?
A: The B-404-C-21 features a shaft with a diameter of 24.00 mm and a length of 20.00 mm.
Q: At what temperatures does the B-404-C-21’s thermostat close and open?
A: The thermostat in this model closes at 132°C and opens at 170°C for thermal protection.
