P21NSXB-LNN-NS-04 Pacific Scientific
Wake Industrial LLC is not an authorized distributor of this product.
The Pacific Scientific P21NSXB-LNN-NS-04 belongs to the POWERMAX II P Motors series and features a NEMA 23 frame size with standard construction. This motor offers a holding torque of 111 oz-in and step accuracy of ±1.5 percent with a step angle of 1.8 degrees. It has a single smooth shaft with a 6.35 mm diameter and uses a Class B insulation rated at 340 VDC.
Internal Product Review
The P21NSXB-LNN-NS-04 is a Pacific Scientific POWERMAX II P stepper motor with a NEMA 23 frame and 111 oz-in holding torque. A 1.8-degree step angle and ±1.5% step accuracy support consistent indexing and clean motion control performance. Strong torque characteristics make the motor a dependable choice for compact positioning applications.
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Product Description:
The P21NSXB-LNN-NS-04 is a hybrid stepper motor produced by Pacific Scientific for the POWERMAX II P Motors series. Built with standard construction and a single smooth shaft, it fits the NEMA 23 frame class and mounts through the matching NEMA-style flange. Within motion-control assemblies, this motor delivers incremental positioning without integral feedback, making it suitable for indexing tables, small actuators, and other open-loop automation stages. Its receptacle-equipped housing provides a direct connection point for motor wiring while preserving a compact profile. The open-loop design allows a compatible stepper drive to control movement through accurately timed current pulses.
Each full electrical cycle advances the rotor by 1.8 degrees, so one mechanical revolution is subdivided into 200 discrete steps that can be counted directly by a controller. Step placement error is held to ±1.5 %, limiting cumulative position drift in long sequences. When energized in a bipolar circuit, the motor can maintain a static load with a holding torque of 111 oz-in, providing a clear reference for vertical or friction-coupled axes. Dynamic response is influenced by the laminated rotor’s inertia of 0.012 × 10⁻³ kg·m². Heat produced at rated current exits the motor through a thermal resistance of 5.5 °C/W. Because no encoder is fitted, the control electronics must rely on the commanded step count to track position.
Mechanical limits include a maximum axial shaft load of 58 N and a radial load capacity of 89 N, which help protect the 30 mm bearings from premature wear. The single shaft has a diameter of 6.35 mm, and the receptacle-equipped housing weighs 0.68 kg, allowing installation on compact gantries. Continuous operation is permitted from -20 °C to +40 °C. Class B insulation withstands 340 VDC and maintains an insulation resistance of 100 MΩ under dry conditions. The motor uses standard construction without additional sealing or forced cooling, so the installation must provide suitable protection and adequate heat dissipation for the intended operating area.
