Product Description:

The MSM215-221-304-M-0KA is a brushless servo motor produced by Kollmorgen for the MSM Brushless Servo Motors series. The motor is intended for industrial automation axes that demand fast response and repeatable positioning, such as pick-and-place gantries, form-fill-seal stations, and compact machining centers. By converting three-phase power from a matched servo drive into tightly regulated torque, it supports systems that require electronic control of speed, direction, and stopping accuracy.

Its continuous output capability reaches 25 Nm, allowing the shaft to deliver constant torque without overheating when the motor is ventilated within its operating limits. For short bursts, the electromagnetic stack can raise torque to 70 Nm, supporting rapid acceleration profiles. At the rated speed of 3000 rpm, the motor operates with a 460 V winding. The winding draws up to 65.1 A of peak line current during high-demand transients. The magnetic design uses six rotor poles and produces torque in proportion to phase current with a torque constant of 1.36 Nm/A. A back electromotive force of 164 V per 1000 rpm assists the drive with field-oriented regulation.

The inertial load presented to the control loop is 0.0074 kg·m², balancing dynamic responsiveness with mechanical stability for mid-mass indexing tables. The copper windings have a phase inductance of 15.8 mH and a resistance of 0.76 Ω; these electrical parameters influence current rise time and the proportional-integral gains used for tight velocity control. Thermal mass is supported by a housing weight of 26.0 kg, while stall torque is reached at 20.5 A per phase, reducing bus ripple under static loads. The 60 mm ST-60 steel shaft terminates in an M12 × 1.75 mm thread cut to a depth of 28 mm, and the six-pole architecture helps smooth cogging at low speed.