KBM-43S03-B00 Kollmorgen
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The Kollmorgen KBM-43S03-B00 is part of the KBM Brushless Motors series and has a rated power of 2875 W with a rated speed of 2275 rpm. This motor provides a continuous stall torque of 20.7 Newton meters and a peak stall torque of 64.5 Newton meters. It operates at a voltage class of 240 VAC and weighs 5.96 kilograms.
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Product Description:
The KBM-43S03-B00 is a frameless brushless motor stator-rotor set built by Kollmorgen as part of the KBM Brushless Motors series. Designed for direct integration into machine structures, the kit supplies torque for indexing tables, rotary actuators, and gimbal axes without the bulk of housed servomotors. Its open architecture lets original equipment manufacturers minimize drivetrain backlash and meet the tight space or weight constraints common in automated production equipment.
At its electrical operating point, the unit delivers a continuous stall torque of 20.7 N·m while drawing 13.8 Arms; these values indicate the thermal steady-state limit before the winding temperature rises above rated levels. The linear relationship between phase current and output torque is set by the 1.54 N·m/Arms torque constant, allowing drive amplifiers to predict motion accurately. A rated speed of 2275 rpm combines with the mechanical output to provide 2875 W of shaft power, matching mid-range rotary axes that must sustain moderate duty cycles. The windings have 0.595 Ω of DC resistance at 25 °C. With 93.3 Vrms/kRPM of back electromotive force, the motor pairs well with drives that use sinusoidal commutation across its 16-pole rotor.
Dynamic events are supported by a peak stall torque of 64.5 N·m, enabling short bursts of motion for indexing or rapid acceleration without demagnetization. The rotor has an inertia of 0.00475 kg·m², while mechanical losses originate from 0.203 N·m of static friction and 0.86 N·m/kRPM of viscous damping. The motor has a per-phase inductance of 2.2 mH, which filters switching harmonics and shapes current-loop bandwidth. The motor has a 240 VAC voltage class, simplifying compatibility with suitable power systems. Its overall mass is limited to 5.96 kg, easing installation on moving carriages or lightweight frames.
