Product Description:

The P21NSXC-LDN-M1-02 is a two-phase stepper motor manufactured by Pacific Scientific for the POWERMAX II P Motors series. It translates pulse commands from drive electronics into fixed angular increments, enabling repeatable positioning in pick-and-place heads, small conveyors, and metering pumps. The motor fits the NEMA 23 envelope common to compact machinery, so it can be mounted on equipment that uses this standard frame size.

With a rated holding torque of 116 oz-in (0.82 Nm), the motor resists load disturbance when energized. The NEMA 23 frame uses a 2.3-inch square flange that matches widely used brackets, while a receptacle connection simplifies wiring. Each electrical cycle produces a 1.8-degree step, so the rotor completes 200 discrete positions per revolution, and overall motion error remains within the stated step accuracy. Standard construction, a single magnetic stack, and a standard rotor help keep inertia low for quick acceleration. Continuous service is supported from -20 °C to +40 °C, and the windings use a Class B, 130 °C insulation system for normal industrial duty.

The stator uses 2 phases with winding code C, giving predictable current per phase for common micro-stepping drives. During power-off conditions, the rotor aligns to a detent that delivers 4 oz-in of unenergized torque, which helps maintain position until brake force or drive torque is applied. Heat generated in the coils transfers through the housing at a rate of 5.5 °C/W, so temperature rise can be estimated for the operating cycle. Electrical insulation withstands up to 340 Vdc without breakdown and has 100 megohms of resistance at ambient conditions. A double smooth shaft is provided for mounting encoders or couplings, and the motor includes an integral provision that simplifies encoder installation when closed-loop feedback is required.