Product Description:

The MH-425-D-63 is a permanent-magnet servo motor produced by Kollmorgen for the M Goldline Servo Motors series. Intended for closed-loop industrial axes, it converts commanded current into controlled rotary motion for positioning tables, pick-and-place heads, and other equipment that requires repeatable servo response. A connector system supports rapid cable exchange, while a frameless resolver supplies analog feedback for velocity and position control. The frame attaches to machines through a 130.00 mm bolt circle, provides an overall length of 372.1 mm when no brake is fitted, and ships without a shaft seal for use in protected enclosures.

In systems using a 480 VAC line supply, the motor can produce a continuous mechanical output of 3.3 kW. At standstill, it provides 10.6 N·m of torque, allowing tension control without additional brakes. The laminated rotor has an inertia of 0.00441 kg·m², giving rapid acceleration while keeping servo overshoot low. Commanded speed reaches 3700 rpm before field-weakening limits appear, supporting high-throughput indexing. Thermal protection is handled by an internal thermostat that opens at 170 °C and is rated for 4 A at 120 VAC, allowing the drive to disconnect power if airflow or duty cycle causes excessive winding temperature.

For short bursts, the stator can withstand peak demand up to 20.0 N·m, supplying the extra torque required to overcome static friction or accelerate heavy loads. The body length of 319.2 mm yields a compact profile that suits tightly spaced axis layouts while still offering enough surface area for heat dissipation. After cooling, a second thermostatic contact recloses at 132 °C. With a total mass of 9.5 kg, the motor imposes modest reaction forces on standardized servo mounting plates during acceleration and deceleration.