Product Description:

The M-105-A-12 is a brushless servo motor produced by Kollmorgen within the M Goldline Servo Motors series. Designed for closed-loop positioning and speed control, the unit supplies regulated torque to actuators, pick-and-place heads, or indexing tables in automated machinery. When paired with a digital drive, the motor converts electrical commands into precise rotary motion, allowing machine systems to reduce mechanical gearing and maintain accurate synchronization between multiple axes.

During steady operation, the motor develops a continuous stall torque of 1.55 N·m while drawing 3 A rms of phase current; these paired ratings indicate the load the axis can support continuously without exceeding its temperature limit. The electromagnetic design provides a torque constant of 0.512 N·m/A rms, allowing the drive controller to calculate output torque from the commanded current. A back-electromotive-force constant of 31 V rms/krpm indicates the voltage that appears at the terminals during free-running operation and helps determine the maximum speed for a given bus voltage. The winding inductance is 28.1 mH, which helps filter switching waveforms, control current rise times, and minimize ripple under high-frequency pulse-width modulation.

Transient demands are supported by a peak stall torque of 4.38 N·m and an allowable surge current of 9 A rms, providing additional capacity for acceleration or sudden load changes. The rotor has an inertia of 0.000338 kg·m², which supports quick speed reversals without compromising stability. The motor has an overall body length of 262.1 mm, a 14 mm shaft, and a frame diameter of 70 mm. Its assembly mass of 4.1 kg helps limit the moving load when the motor is installed on a gantry axis. Thermal behavior is characterized by a resistance of 1.07 °C/W and a thermal time constant of 11 minutes, allowing heat rise to remain predictable during short-term overloads.