Product Description:

The 803D2220-B055S is a hybrid stepper motor produced by Pacific Scientific for the POWERMAX II M Motors series. In automation equipment, the motor indexes mechanical loads in accurate 1.8° increments when operated by a compatible microstep controller. Its controlled movement supports light-duty positioning tasks that do not require belts or reduction mechanisms. The square NEMA-class housing provides a familiar mounting profile for use in compact machinery, linear stages, and other motion-control assemblies.

The motor is wired for a bipolar drive connection, so the controller energizes each phase with alternating polarity to achieve full torque density. Its compact laminated stack has a face width of 2.25 in, while the overall frame diameter measures 2.3 in. The black, orange, red, and yellow leads use flexible 22 AWG conductors that carry the required phase current while limiting stress at bends. Each lead is at least 12.0 in long, allowing direct termination on a compatible controller or breakout board without extensions. The conductors exit the housing through a protective grommet that helps preserve the integrity of the insulation where the wiring passes through the frame. This lead arrangement provides clear phase identification during connection and helps keep the wiring path organized inside compact equipment.

During installation, the housing registers on the pilot bore associated with the NEMA 23 standard. A centered boss measuring 1.500 in seats the motor against the mating surface and supports accurate alignment with the driven component. Power is transmitted through a ground steel shaft measuring 0.2500 in in diameter, and the shaft extends only from the load end of the housing. The isolated motor phases do not require internal jumpers, which keeps the external wiring arrangement straightforward. A four-hole mounting pattern uses 0.200-inch bores positioned on a 2.625-inch bolt circle for secure attachment to gearboxes, brackets, or linear stages. Because there is no rear shaft protrusion, the back of the motor remains unobstructed for nearby machine components, cooling airflow, or an external braking assembly.