Product Description:

The M21NSXC-LDF-NS-02 is a two-phase stepper motor manufactured by Pacific Scientific within the POWERMAX II M Motors series. Designed for open-loop positioning in pick-and-place stations, small conveyors, and indexing tables, the unit converts digital pulse trains from a compatible drive into precise incremental shaft movement. Its NEMA mounting interface allows installation in compatible legacy frames, while the enhanced construction supports consistent torque delivery during the repetitive motion cycles common to industrial automation. The motor uses a double-ended shaft, allowing mechanical loads or accessories to be coupled on either side of the frame and providing additional flexibility in compact machine layouts.

The motor advances with a step angle of 1.8°, dividing each complete rotation into 200 discrete steps per revolution. Each commanded movement has a positioning accuracy of ±1.5%, making the motor suitable for material-handling and light assembly duties that require repeatable incremental motion. The housing uses a NEMA 23 frame size, which provides a standardized mounting pattern for integration with compatible brackets and machine frames. The magnetic stack keeps the motor at a body length of 2.06 in, helping it fit within shallow enclosures or tightly arranged machine assemblies. These dimensions preserve the angular resolution needed for operation with full-step or microstepping drives without requiring an oversized motor housing.

The windings use Class B insulation rated for 130 °C, permitting continuous operation while protecting the winding system from elevated internal temperatures. The motor supports an ambient operating range of -20 °C to +40 °C, allowing machinery to start in cold conditions and continue operating in moderate heat without derating. The shaft supports a radial load capacity of 20 lb, making it suitable for small pulleys, belt drives, and other loads that apply force perpendicular to the shaft axis. Its shaft diameter of 0.2500 in provides a compact mechanical interface for appropriately sized couplings and hubs. A machined shaft flat improves engagement with set screws, helping prevent rotational slip when torque is transferred to the connected load.