Product Description:

The M-207-A-21 is a brushless AC servo motor built by Kollmorgen within the M Goldline Servo Motors series. It converts electrical energy into controlled rotary motion for positioning and speed-regulated duties in machine tools, packaging lines, and robotic axes. When paired with a compatible drive, the motor supports closed-loop torque and velocity control so repeated motion cycles can remain accurate and stable. Its operating profile makes it suitable for applications that need dependable response, repeatable motion, and smooth acceleration across normal industrial duty cycles.

In continuous operation, the motor draws 3 Arms and produces 6.51 N-m of continuous stall torque. A back electromotive force constant of 130.2 Vrms/kRPM relates shaft speed to the voltage returned to the drive, which helps support controlled operation across the usable speed range. The copper windings have a dc resistance of 8.82 Ohms and an inductance of 130 mH, and those values affect current rise and loop response. When supplied from a 230 VAC bus, the rotor can reach 1400 RPM for medium-speed indexing and general positioning work. The published motor data also includes a torque constant of 2.153 N-m/Arms and a rated torque of 6.62 N-m for drive matching and thermal loading calculations.

During short overloads, the motor can deliver 20.5 N-m at the shaft for brief intervals. Rotor inertia is 0.0018 kg-m², which supports quick acceleration while helping the axis remain responsive during start and stop sequences. Static friction is 0.11 N-m, the thermal path is rated at 0.64 °C/W, and the thermal time constant is 21 minutes, so short duty cycles can be absorbed before internal temperature rises sharply. On a 230 VAC supply, continuous mechanical output reaches 970 W, giving the motor a practical balance of torque and speed for general-purpose servo applications.