Product Description:

The B-404S-C-93-B3-072 is a brushless servo motor produced by Kollmorgen within the Goldline B and BH Motors series. As a rotary actuator for tightly regulated positioning and speed loops, it converts commanded drive current into mechanical motion for packaging lines, pick-and-place modules, and similar automated machinery. Kollmorgen equips this model with an integral fail-safe brake and resolver feedback so the axis can hold loads and report position data to the drive controller.

At the core of its load-carrying capability is a continuous stall torque of 13.1 N-m, which is the steady torque the housing can dissipate thermally without overheating. When operated at rated speed, the windings can deliver up to 5400 W, which helps match the motor with suitable gear sets and power stages. The electromagnetic design produces a torque constant of 0.66 N-m/Arms, linking commanded phase current to actual shaft torque. A back electromotive force constant of 40.2 Vrms/kRPM indicates the voltage generated per thousand revolutions, letting the drive predict regenerated energy during deceleration. Copper losses in continuous duty are set by a phase resistance of 0.34 ohms, which determines heat produced for any given RMS current.

Supplementing those drive-side numbers, the holding brake supplies 8 N-m of static torque and is energized with 24 VDC, keeping vertical axes stationary when power is removed. For brief transients such as indexing or rapid acceleration, the motor withstands a peak stall torque of 35.3 N-m before magnetic saturation limits performance. Dynamic response is aided by a rotor inertia of 0.000656 kg-m2, which balances quick acceleration with stable control gains. The motor has a 115 mm frame diameter, an overall length of 318.8 mm, a 24 mm shaft diameter with a 50 mm extension, and an 8.4 mH phase inductance that shapes current loop bandwidth.