M112-FD12E Danaher
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The Danaher M112-FD12E is a stepping motor from the Slo-Syn Stepping Motors series with a round flange style and a 110 mm frame size. It offers a bipolar hold torque of 1390 oz-in, 4.3 A bipolar current, and 5.2 VDC bipolar voltage. This motor has a step angle of 1.8 degrees, ±5% step accuracy, and features a double ended shaft with a maximum overhang load of 25 pounds.
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Product Description:
The M112-FD12E is a hybrid stepping motor manufactured by Danaher as part of the Slo-Syn Stepping Motors series. It is intended for incremental motion tasks in industrial automation, where controllers issue pulse trains that the motor converts into discrete shaft positions without closed-loop feedback. The design offers a direct means to index tooling, actuate small conveyors, or rotate inspection tables with consistent angular resolution.
With bipolar excitation, the motor draws 4.3 A per phase at a rated winding voltage of 5.2 VDC. Under these conditions, it can sustain a holding torque of 1390 oz-in, allowing fixtures or loads to remain stationary when pulses stop. Each full step advances the rotor by 1.8°, and cumulative positioning error remains within ±5% of one step, so indexing accuracy is predictable for fixture design. A rotor inertia of 0.114 oz-in-s² moderates acceleration profiles and helps damp velocity ripple. The stator includes six lead connections, allowing a drive to use bipolar or unipolar wiring without requiring motor modifications. A round flange mates with compatible gearheads for direct mechanical integration. The shaft is machined on both ends to simplify the connection of an encoder or a second load.
When wired in unipolar mode, the phase current rises to 6.1 A, while the winding voltage requirement falls to 3.66 VDC. In this configuration, the motor delivers a static torque of 1125 oz-in, which is adequate for lighter-duty operation while reducing driver dissipation. The frame provides a mounting face of 110 mm and supports an overhung load of up to 25 lb as well as axial thrust of up to 50 lb. Minimum residual detent torque is 12 oz-in, so small disturbances are less likely to cause unintended movement when the motor is de-energized. Its open-loop operation depends on the controller maintaining an appropriate pulse rate and acceleration profile for the connected load. The six-lead arrangement provides flexible winding connections, while the double-ended shaft accommodates attachments on either side of the motor.
