LSM165-221-454-M-0KA Kollmorgen
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The Kollmorgen LSM165-221-454-M-0KA is a brushless servo motor from the LSM Brushless Servo Motors series. It delivers a continuous torque of 25 Nm and a peak torque of 100 Nm, with a maximum speed of 4500 RPM. The motor features a multi-turn absolute feedback type and weighs 21.0 kilograms.
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Product Description:
The LSM165-221-454-M-0KA is a brushless servo motor manufactured by Kollmorgen and supplied through the LSM Brushless Servo Motors series. It is intended for industrial automation tasks that require accurate torque, allowing a drive controller to regulate shaft motion for gantries, packaging lines, or coordinated multi-axis stages. An embedded multi-turn absolute encoder transmits position data to the drive, so the motor can retain its exact position after a power cycle. Because this version is supplied without a brake, holding torque must be provided externally whenever power is removed.
Under a continuous load, the unit delivers 25 Nm without exceeding its thermal limit. When commanded to accelerate light loads, the rotor can reach 4500 rpm, providing short indexing times. The motor has a torque constant of 0.91 Nm/A, allowing each ampere of phase current to produce almost one newton-meter of shaft torque. Thermal losses are influenced by a phase resistance of 0.33 ohm, while current regulation dynamics are shaped by a winding inductance of 3.6 mH. The eight-pole rotor works with a voltage constant of 109 V/krpm, matching the motor to standard 400 V class servo drives. These electrical characteristics allow the connected drive to regulate current precisely during speed changes and sustained operation.
Dynamic operation is supported by a peak torque of 100 Nm, allowing rapid acceleration until the winding current reaches 134.4 A peak; the stall current for longer static loads is 30.3 A. A rotor inertia of 0.00165 kg·m² balances quick response with mechanical stability, and the housing mass of 21.0 kg supports heat dissipation. The shaft end uses an M10 × 1.5 mm thread cut to a depth of 22 mm for secure coupling to gearheads or timing pulleys. This threaded interface provides positive axial retention when the selected coupling is installed with compatible hardware. The motor housing provides a rigid mounting structure that helps preserve shaft alignment under changing radial and axial loads.
