AKM42H-BKCNAB-00 by Kollmorgen

The AKM42H-BKCNAB-00 is a high-performance servo solution from Kollmorgen, belonging to the renowned AKM Synchronous Servo Motors series. This motor delivers a continuous stall torque of 3.54 n-m and supports a maximum speed of 2890 rpm at 120 VAC (and up to 5780 rpm at 240 VAC). Rated for operation in environments up to 40 °C ambient temperature, it provides 510 W of output power at 120 VAC (and 1170 W at 240 VAC). The robust design features a 84 mm frame dimension and NEMA flange configuration, ensuring compatibility with standard industrial mounts.

With a peak stall torque of 11.6 n-m and a peak stall current of 24 Arms, this motor handles dynamic loads and rapid acceleration demands. The 38.3 Vrms/krpm back EMF constant and 0.59 Nm/A RMS torque constant yield precise electromechanical conversion, optimizing motion control loops. Thermal performance is managed by a 17-minute thermal time constant in conjunction with a 0.8 °C/W thermal resistance, enabling predictable derating profiles. The H winding designation and 0.000145 kg·m² rotor inertia further enhance responsiveness and minimize settling times.

Operational reliability is bolstered by a Brake System without brake option for friction-free operation and 2 SpeedTec Ready connectors for streamlined cabling. The integrated BISS B encoder feedback system offers high-resolution position data, while the open keyway shaft detail simplifies coupling to downstream mechanical elements. With a rotor length index of 2, the motor provides a balanced trade-off between torque density and overall length. The combination of these features reduces commissioning time and lowers maintenance requirements in continuous-duty scenarios.

Integration into larger automation schemes is straightforward thanks to its membership in the AKM Synchronous Servo Motor product family and compatibility with Kollmorgen’s drive platforms. The motor’s compact 84 mm frame dimension and NEMA flange configuration facilitate drop-in replacement in legacy systems. Its high ambient temperature rating and predictable thermal characteristics make it suitable for industrial automation, robotics, packaging machinery, and CNC applications requiring high torque density and precise speed regulation.