Product Description:

The B-604-A-B9-048 is a brushless servo motor produced by Kollmorgen as part of the Kollmorgen Goldline B and BH Motors series. It is intended to deliver closed-loop rotational motion for indexing tables, gantry axes, and other industrial automation applications that demand accurate torque and speed control. When paired with a compatible digital drive, the motor converts commanded currents into precisely regulated shaft output, allowing machinery to position loads rapidly while maintaining tight velocity accuracy.

This model operates from a 230 VAC bus and generates continuous shaft torque of 30.1 N-m while drawing a continuous phase current of 19 A RMS. At this operating point, the copper and iron losses are balanced by the housing’s 0.28 °C/W thermal path, so temperatures remain within class limits. The electromagnetic design provides a torque constant of 1.58 N-m/A RMS, meaning each additional ampere supplied by the drive produces predictable mechanical output. For duty cycles that demand sustained rotation, the motor can deliver rated torque of 26.65 N-m at a shaft power of 6000 W. Its 95.78 V RMS/kRPM back EMF constant supports drive voltage scaling and proper commutation across the operating speed range.

Transient loads are handled by a peak torque of 86.4 N-m, which the motor can reach by accepting up to 57.4 A RMS for short periods without demagnetization. Dynamic response is influenced by a stator inductance of 13.3 mH; this value affects current-loop bandwidth and how quickly the drive can modulate torque during rapid reversals. A thermal time constant of 33 minutes allows the windings to absorb overload energy before steady-state limits are approached, while the 0.51 Ω DC resistance and four-pole design also affect voltage drop and servo stiffness during high-speed indexing.