Product Description:

The P21NRLC-LSS-NS-03 is a two-phase hybrid stepper motor built by Pacific Scientific within the POWERMAX II P Motors series. It is intended for open-loop or micro-stepped positioning axes that demand moderate torque from a compact NEMA frame. The motor is used in discrete indexing, pick-and-place stations, or incremental feeders that require repeatable motion without an onboard feedback device. The unit connects to a drive through flexible leadwires and converts phase currents into incremental 1.8-degree steps that advance machinery in fixed angular increments.

At its rated winding configuration, the motor supplies 0.82 Nm of holding torque while detent torque is limited to 0.03 Nm, so static load capacity is high compared with cogging. The NEMA 23 frame and matching NEMA face mount support standardized mechanical interchange. Motion resolution comes from a step angle of 1.8 degrees with an accuracy of ±1.5%. In bipolar-parallel mode, the motor draws 3.5 A per phase through a 4-lead harness, and the winding has 1.06 Ω of resistance with 2.3 mH of inductance for predictable current rise times. With one stack, a standard rotor, and 0.012×10⁻³ kg·m² inertia, the motor accelerates rapidly, and heat leaves the housing at 5.5 °C/W.

The windings use Class B insulation rated for 130 °C and withstand 340 VDC, while a dielectric test of 500 VDC for one minute confirms a 100 megohm resistance path to ground. The enclosure carries an IP23 rating, permitting use in sheltered industrial spaces at ambient temperatures from -20 °C to +40 °C. Surface temperature may reach 95 °C at full load, and thermal energy is moderated by the single-stack design and a C-type winding scheme. Positioning repeatability benefits from 200 full steps per revolution, delivered without encoders because the model is supplied with no feedback option, and regular leadwires simplify cabinet wiring.

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