Product Description:

The MSM215-221-304-M-2KA is a brushless servo motor produced by Kollmorgen for the MSM Brushless Servo Motors series. It is intended to deliver tightly regulated rotary motion in automated machinery, pairing with digital drives to position loads quickly and repeatably. By combining an integrated electromagnetic brake, high-resolution feedback, and a frame sized for mid-range power, the motor supports indexing tables, gantry axes, and material-handling equipment that require frequent starts and stops without loss of accuracy.

Under continuous duty, the motor supplies 25 Nm of torque while maintaining its rated shaft speed of 3000 rpm. Short overload events can be absorbed because the electromagnetic design permits a peak torque of 70 Nm and draws a peak current of 65.1 A from the drive. The windings are optimized for a 460 V-class DC bus, and they present 0.76 Ω of resistance together with 15.8 mH of inductance, a combination that limits current ripple and improves drive bandwidth. With a stall current of 20.5 A, the motor can hold static loads without external gearing, while a voltage constant of 164 V/kRPM allows the controller to predict back EMF during high-speed deceleration. Multi-turn, high-resolution feedback transmits absolute position to the servo amplifier, eliminating homing cycles after power loss.

The magnetic circuit delivers a torque constant of 1.36 Nm/A, so commanded current translates linearly into output torque over the usable speed range. Dynamic behavior is set by a rotor inertia of 0.0104 kg·m² when the brake is fitted, striking a balance between rapid acceleration and low overshoot. The holding brake is energized by a 24 VDC supply, letting the axis remain locked whenever the drive is disabled. Mounting is simplified by a 32 mm shaft that ends in an M12 × 1.75 mm thread for push-on accessories. The motor has a total mass of 29 kg with the brake installed, providing thermal capacity for extended duty cycles while keeping its footprint moderate.