Product Description:

The MSM165-146-304-M-2KA is a brushless servo motor manufactured by Kollmorgen within the MSM Brushless Servo Motors series. The unit converts electrical power into controlled mechanical rotation so machine tools, packaging stations, and pick-and-place axes can follow precise motion profiles commanded by a drive. It operates from a 460 V supply and uses a six-pole rotor to achieve high torque density while maintaining compact dimensions for space-constrained or direct-drive installations.

Rated continuous torque reaches 16.5 Nm, allowing the shaft to hold steady loads without exceeding its thermal limits. During rapid indexing or acceleration, peak torque climbs to 54 Nm, providing the short burst of force needed to overcome system inertia. The motor has a base speed of 3000 rpm, matching common drive settings for synchronous positioning tasks. Current demand at full dynamic output can reach 52.3 A peak, so conductors and drives must be sized accordingly; at stall, the peak draw falls to 13.6 A. A torque constant of 1.34 Nm/A links commanded current to developed torque, enabling deterministic current-loop tuning. The stator winding has an inductance of 18.5 mH, which affects the drive’s pulse-width modulation strategy and helps limit current ripple. Electrical losses are influenced by the 1.56 Ω phase resistance, while a voltage constant of 161 V/krpm indicates the back electromotive force generated in relation to motor speed.

The combined rotor and brake assembly has an inertia of 0.0044 kg-m², balancing quick acceleration with smooth velocity regulation in mid-mass gantries or indexers. A holding brake energized at 24 VDC secures vertical or suspended loads when power is removed. With the brake fitted, the motor weighs 18.2 kg, which must be considered when selecting mounting hardware and structural supports. Mechanical coupling uses an M8 × 1.25 mm shaft thread cut to a depth of 19 mm, simplifying hub or pulley attachment without additional adapters.