LSM75-21-602-E2-2KA Kollmorgen
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MPN: M.1302.1316
The Kollmorgen LSM75-21-602-E2-2KA is a brushless servo motor from the LSM Brushless Servo Motors series with a face size of 75 mm and a steel shaft. It features a continuous torque of 2.36 Nm, a peak torque of 8.8 Nm, and supports a maximum speed of 6000 rpm with a maximum current of 21.6 Amps peak. The motor operates at a nominal voltage of 230 V and is fitted with a 2000 line encoder.
Internal Product Review
The LSM75-21-602-E2-2KA is a Kollmorgen brushless servo motor with 2.36 Nm continuous torque and 8.8 Nm peak torque. A 2000-line encoder and 6000 rpm maximum speed support precise feedback and strong dynamic response in motion applications. An excellent servo choice for demanding axes, with 21.6 A peak current standing out for fast acceleration.
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Product Description:
The LSM75-21-602-E2-2KA is a brushless servo motor manufactured by Kollmorgen for the LSM Brushless Servo Motors series. Its 75 mm square front flange allows direct mounting to compact gearboxes and machine plates, and the windings are rated for a 230 V DC bus commonly used in automated assembly cells. The unit supplies position-controlled rotary power for pick-and-place axes, light-duty conveyors, and other machinery that depends on precise torque modulation.
Under continuous load, the motor delivers 2.36 Nm while remaining within its thermal limits. Maximum mechanical speed reaches 6000 rpm, and the back electromotive force constant is 49 V/kRPM, indicating the voltage generated during regeneration. The electromagnetic design provides a torque constant of 0.42 Nm/A, so current commands from the drive translate linearly into shaft torque. Peak current capability is 21.6 A, supporting fast acceleration profiles, while stall current is limited to 5.5 A to protect the stator. An eight-pole rotor improves low-speed smoothness, and position feedback is supplied by an optical encoder with 2,000 quadrature lines. The steel shaft provides fatigue resistance during repeated acceleration and deceleration cycles.
The servo can generate up to 8.8 Nm of momentary torque to overcome static friction or inertial spikes. A fail-safe brake energized at 24 VDC locks the rotor during power loss, protecting vertical or suspended loads from unintended movement. A winding inductance of 17.9 mH and a resistance of 2.26 ohms shape the electrical time constant, allowing the drive to tune current loops without excessive ripple. Radial shaft loading is permitted up to 24 kg at 6,000 rpm, which supports belt-driven and geared applications within the permitted load range. The encoder, brake, and sealing components are secured inside the housing to simplify installation and protect the internal assemblies.
