Product Description:

The MX93-FF-401U is a hybrid stepper motor produced by Kollmorgen as part of the MX Hazardous Duty Stepper Motors series. The model converts discrete pulse commands from an indexer or drive into indexed rotation for positioning valves, dampers, or small conveyors in classified areas. A sealed 90 mm frame houses the laminated stator and rotor, giving the motor the hazardous-duty construction required for combustible atmospheres while maintaining the step accuracy associated with two-phase, four-lead designs.

The motor body measures 90 mm square, defining the mounting footprint for NEMA 34 compatible brackets. Each full step advances the shaft by 1.8°, and with a native resolution of 200 steps per revolution, open-loop control can achieve repeatable indexing without an encoder. A holding torque of 3.88 Nm keeps the load stationary whenever the phases are energized, which is useful for vertical axes that must resist back-driving. Current through each phase is limited to 5.0 A DC. The coil’s applied potential is only 3.2 VDC, a low voltage that allows direct connection to high-current microstepping drives without excessive insulation stress.

Winding resistance is 0.65 Ω, so each phase dissipates about 10 W at rated current, and the inductance of 8.0 mH filters rapid current changes, smoothing torque at higher step rates. A rotor inertia of 0.187×10⁻³ kg·m² supports fast acceleration of modest loads while helping keep settling times short. The shaft endures axial loads up to 222 N and radial forces up to 111 N, enabling belt or gear coupling without immediate bearing fatigue. Thermal resistance of 2.1 °C/W quantifies heat flow from the windings to ambient, and the four-lead connection scheme helps predict case temperatures and select drive currents that stay within insulation class limits.