LSM75-21-602-M-2KA Kollmorgen
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MPN: M.1302.1370
The Kollmorgen LSM75-21-602-M-2KA is a brushless servo motor in the LSM Brushless Servo Motors series. It offers a continuous torque of 21 lb-in, a peak torque of 78 lb-in, and operates with a rated voltage of 230 VAC. The motor has a multi-turn absolute feedback type, 24 VDC brake voltage, and features an 11 mm shaft diameter with a key width of 4 mm.
Internal Product Review
The LSM75-21-602-M-2KA is a Kollmorgen brushless servo motor with 230 VAC rated voltage and multi-turn absolute feedback. Continuous torque of 21 lb-in and peak torque of 78 lb-in give the motor strong dynamic response for precise motion applications. A well-balanced servo solution for demanding automation, especially with dependable absolute feedback.
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Product Description:
The LSM75-21-602-M-2KA is a brushless servo motor built by Kollmorgen for the LSM Brushless Servo Motors series. It is intended for precision positioning and velocity control in automated machinery that requires compact rotary power and responsive axis movement. An integrated multi-turn absolute encoder supplies the drive with exact shaft-angle feedback, allowing closed-loop operation without a homing cycle after startup. The motor uses an eight-pole rotor to support smooth rotation and low detent during indexing, positioning, and speed-controlled tasks.
Under continuous load, the unit delivers 21 lb-in of torque, while its magnetic structure can provide up to 78 lb-in for short acceleration periods. The windings can draw a peak phase current of 21.6 A when rapid torque production is required. At stall, current is limited to 5.5 A to control winding temperature during continuous operation. Power is supplied from a three-phase bus at a nominal level of 230 VAC. The eight stator slots contain windings with an inductance of 17.9 mH, which helps reduce current ripple from the drive inverter, while a resistance of 2.26 Ω establishes the steady-state copper losses and influences temperature rise under load.
The motor includes a holding brake that operates from 24 VDC and engages automatically whenever control power is lost. This brake helps prevent a stationary load from moving when the drive can no longer apply holding torque. Electromechanical output follows a back-EMF slope of 49 V/kRPM, while torque increases with current at a sensitivity of 0.42 Nm/A. The output shaft has an 11 mm diameter and extends 23 mm from the motor housing, providing space for a compatible pulley, gearbox, or rigid coupling. A 4 mm key provides positive mechanical engagement between the shaft and the connected component, reducing the possibility of rotational slippage. The motor is suited to indexing tables, pick-and-place heads, and similar automation axes that rely on accurate position feedback and controlled acceleration.
