M-403-B-21-B3 Kollmorgen
Wake Industrial LLC is not an authorized distributor of this product.
Wake Industrial LLC is not an authorized distributor of this product.
The Kollmorgen M-403-B-21-B3 is a servo motor from the M Goldline Servo Motors series with a rated power of 2200 Watts and a rated torque of 8.4 Newton-meters. It offers a continuous stall current of 6.4 Arms and a peak stall torque of 19.8 Newton-meters. The motor weighs 10.5 kilograms and operates with a brake voltage of 24 VDC and a brake torque of 8 Newton-meters.
Internal Product Review
The M-403-B-21-B3 is a Kollmorgen M Goldline servo motor with 2200 W rated power and 8.4 N-m rated torque. Continuous-duty performance is especially impressive, with 6.78 N-m continuous stall torque and 19.8 N-m peak stall torque supporting demanding motion profiles. Strong servo characteristics make this motor an excellent fit for precise, high-performance axis applications.
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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.
