Product Description:

The MX111-FF-401U is a hazardous-duty stepper motor manufactured by Kollmorgen as part of the MX Hazardous Duty Stepper Motors series. It is intended for industrial automation tasks that require spark-free motion control in classified environments. The motor translates digital pulse trains from a drive into precise shaft rotation so dampers, metering pumps, and positioning tables can be moved predictably.

This model delivers 6.0 N·m of holding torque, allowing the shaft to resist external forces whenever the coils remain energized. Each phase draws a rated current of 1.1 A DC, so power supplies and cabling can be sized for a modest continuous load. Motion resolution is set by a 1.8° step angle, and the full electrical sequence produces 200 steps per revolution for predictable incremental travel. Position tolerance remains within ±5 % step accuracy, which helps limit cumulative error during multi-turn moves. A radial shaft load capacity of 111 N protects the bearings when pulleys or couplings impose transverse forces, while two motor phases keep commutation simple and compatible with common bipolar drives. Insulation resistance of 100 MΩ and an insulation voltage rating of 340 Vdc separate the windings from the laminated frame and help prevent leakage during elevated humidity or surge events.

The electrical time constants are influenced by a phase inductance of 16 mH and a phase resistance of 3.6 Ω, which affect current rise time and acceptable microstepping frequencies. Thermal behavior includes a 7.4 °C/W winding-to-case path, so airflow or heat sinks may be added if duty cycle pushes coil temperature toward the 130 °C insulation limit. The motor tolerates a continuous axial load of 222 N, and its rotor inertia of 3.93 × 10⁻³ kg·m² supports a balance between dynamic response and vibration damping. The total unit weight is 4.5 kg, which allows rigid mounting without excessive frame mass.