Product Description:

The P21NSXS-LNN-NS-02 is a two-phase stepper motor produced by Pacific Scientific as part of the POWERMAX II P Motors series. As a discrete-motion actuator, it translates pulse commands from an indexer or microstepping drive into precise rotary increments, making it well suited for pick-and-place axes, indexing tables, and small machine tools. Its standard NEMA mounting pattern and single smooth shaft simplify integration with couplings, gearheads, and belt drives used throughout packaging and semiconductor equipment. This type of motor is also useful where predictable incremental motion is needed without adding a separate servo feedback device.

Its housing measures 57.10 mm square and has a body length of 52.4 mm, allowing installation in confined panels while leaving clearance for optional encoders. The frame matches the NEMA 23 outline, so the motor can fit other 57 mm layouts without redrilling. Each full step is 1.8 degrees, so the rotor advances 200 increments per revolution; this resolution eases gear-ratio selection and direct-drive positioning. Dynamic response is aided by a rotor inertia of 0.000012 kg·m², which minimizes settling time when motion reverses or stops. Standard construction, a receptacle connection, and a single smooth shaft support straightforward installation in compact motion assemblies. The compact body also leaves more room for cable routing and nearby mechanical hardware.

The motor weighs 0.68 kg, so it adds limited payload to end-of-arm tooling. Bearing design supports up to 60 N of axial thrust and 90 N of radial side load, enabling direct belt tension or leadscrew loading. Class B insulation endures winding temperatures to 130 °C, and the case may reach 95 °C during continuous duty; electrical integrity is maintained by an insulation resistance of 100 Megohms measured at the 340 V DC test level. Rated service spans ambient limits of -20 °C to +40 °C, permitting use in unheated equipment rooms or lightly conditioned cabinets. One lamination stack, a standard rotor, and the absence of feedback keep drive electronics simple. These operating traits suit machinery that depends on repeatable positioning, moderate load capacity, and uncomplicated electrical integration.