Product Description:

The M-405-D-21 is a brushless AC servo motor produced by Kollmorgen within the M Goldline Servo Motors series. As a rotary actuator, it converts drive current into precise torque for motion axes in packaging machines, pick-and-place gantries, and other automated equipment. The motor is intended for closed-loop operation with Kollmorgen digital amplifiers, where rapid torque response and continuous-duty ratings support accurate position, velocity, and tension control.

Electrically, a continuous stall current of 15.5 Arms can produce a continuous stall torque of 14 N-m, which gives the motor stable low-speed holding capability. The motor has a torque constant of 0.877 N-m/Arms, so shaft torque rises in a predictable way as current increases. The winding has a DC resistance of 0.63 ohms and an inductance of 15 mH, which affects current response and drive tuning. The generated back electromotive force is 53 Vrms/kRPM, so the amplifier must provide enough voltage during high-speed motion. For short transient events, the windings can accept 40.7 Arms peak current, allowing higher acceleration than the continuous rating permits. At its rated operating point, the motor delivers 11.61 N-m at the reference speed commanded by the drive.

The motor can provide a peak stall torque of 35 N-m for short durations when larger inertial loads must be moved or corrected quickly. Its thermal time constant is 25 minutes, which gives the housing time to absorb and release heat during repeated duty cycles. The aluminum housing measures 372.1 mm in length, weighs 15.5 kg, and uses a 24 mm shaft for direct coupling to gearboxes or timing pulleys. Rated output power reaches 4500 W, which suits medium-frame machine tools and converting equipment. Dynamic response is influenced by a rotor inertia of 0.00441 kg-m², helping the motor balance acceleration capability with controlled motion behavior.