Product Description:

The M-403-B-21-B3 is a brushless servo motor manufactured by Kollmorgen as part of the M Goldline Servo Motors series. In automated machinery, this unit supplies commanded torque to linear actuators, rotary tables, and pick-and-place heads, translating drive current into mechanical motion with high positional accuracy. Its built-in electromagnetic brake enables load holding when power is removed, which supports use on vertical axes and other applications that must remain stationary at a stop. The motor is intended for closed-loop motion systems where stable torque delivery and repeatable positioning are both important during frequent start-and-stop operation.

Under continuous load, the motor can deliver a continuous stall current of 6.4 Arms and a continuous stall torque of 6.78 N-m. The copper windings have a DC resistance of 2.6 ohms and an inductance of 50 mH, which influence current rise time and drive tuning. A back electromotive force constant of 67.2 Vrms/kRPM indicates the voltage generated per thousand revolutions, allowing the servo drive to estimate speed during field-oriented control. With a torque constant of 1.11 N-m/Arms, each ampere supplied by the inverter produces slightly more than a newton-meter of torque. Rated torque is 8.4 N-m, which supports steady operation near the motor's thermal operating point.

For rapid moves, the drive may apply a peak stall current of 18.8 Arms, raising shaft output to a peak stall torque of 19.8 N-m for short intervals. The rotor inertia of 0.00259 kg-m² supports quick acceleration while helping the axis remain stable when coupled to moderate loads. Mechanical output at rated speed reaches 2200 W, which suits medium-power motion axes in coordinated multi-axis systems. The spring-applied brake provides 8 N-m of holding torque and uses a control voltage of 24 VDC with a steady brake current of 0.93 A. An overall mass of 10.5 kg matters when the motor is mounted on moving machine members because added weight affects acceleration and deceleration.