MSM165-146-304-M-0KA Kollmorgen
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MPN: M.1302.1256
The Kollmorgen MSM165-146-304-M-0KA is a servo motor in the MSM Brushless Servo Motors series with a continuous torque of 16.5 Nm and a peak torque of 54 Nm. It features a rated speed of 3000 rpm, a shaft diameter of 24 mm, and a net weight of 16.3 kg. The motor has a stall current of 13.6 A peak and a rotor inertia of 0.0036 kg·m².
Internal Product Review
The MSM165-146-304-M-0KA is a Kollmorgen brushless servo motor rated for 16.5 Nm continuous torque and 3000 rpm operation. A 54 Nm peak torque with 52.3 A peak current supports strong transient performance in demanding motion applications. Low 0.0036 kg·m² rotor inertia makes this motor an excellent choice for responsive and precise axis control.
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Product Description:
The MSM165-146-304-M-0KA is a permanent-magnet brushless servo motor from Kollmorgen’s MSM Brushless Servo Motors series. The unit converts three-phase drive power into tightly regulated rotary motion for packaging stations, gantry axes, and other positioning tasks in automated machinery. Its brushless design uses electronic commutation to control torque and speed without the mechanical wear associated with brushes. The motor can operate as part of a closed-loop motion system when connected to a compatible servo drive and feedback device.
It delivers a continuous torque of 16.5 Nm, allowing steady load support without overheating, while a peak torque of 54 Nm handles short acceleration bursts during startup or indexing. A rated speed of 3000 rpm suits common servo drive outputs, and the six-pole rotor supports smooth commutation across the operating range. Torque scales linearly with phase current, and the torque constant is 1.34 Nm/A, allowing precise current modulation through the drive amplifier. For rapid moves, the winding can accept up to 52.3 A peak, whereas the peak stall current is limited to 13.6 A to restrict temperature rise. A back electromotive force constant of 161 V per 1,000 rpm supports DC-bus sizing, while a phase resistance of 1.56 ohms affects winding copper loss. The motor has a 24 mm ST-60 steel shaft with an M8 × 1.25 mm threaded center, which simplifies pulley extraction.
The rotor inertia is 0.0036 kg·m², providing a balance between rapid acceleration and load stability. Current ripple is attenuated by a winding inductance of 18.5 mH, supporting accurate torque regulation under high pulse-width modulation frequencies. The housing has a weight of 16.3 kg, which should be considered when selecting mounting surfaces and support structures. At rated speed, the bearings tolerate a radial side load of 56 kg, allowing the shaft to transmit belt tension or pinion forces within the permitted load range. Proper shaft alignment helps prevent additional radial loading and reduces stress on the bearings during continuous operation. The motor’s six-pole magnetic arrangement supports consistent torque production throughout controlled acceleration, steady-speed operation, and deceleration.
