Product Description:

The M22NSXB-JDN-NS-03 is a hybrid stepper motor produced by Pacific Scientific within the POWERMAX II M Motors series. This electromechanical device converts pulse trains from controllers into fixed angular increments, providing reliable open-loop positioning for indexing tables, metering pumps, and light conveyor zones in industrial automation cells. Its square frame integrates easily with standard automation hardware, giving machine builders a compact drive element that delivers repeatable motion without additional feedback electronics. The motor is suitable for applications that require controlled incremental movement and straightforward integration with a compatible stepper drive.

The enhanced construction grade pairs the stator laminations with a NEMA 23 frame, and the two-stack magnetic circuit produces 17 oz-in of detent torque that helps hold the rotor when the coils are de-energized. Each control pulse turns the rotor 1.8 degrees, so the motor completes 200 discrete steps per revolution with a step accuracy of ±1.5%. Because no encoder is fitted, the drive relies on the inherent repeatability of the low-inertia rotor to maintain its commanded position. Dual type B windings minimize copper losses across the -20 °C to +40 °C operating range. The winding temperature coefficient supports consistent performance in semiconductor pick arms and small metering pumps.

The motor supports an axial shaft load of 13 lb and a radial shaft load of 20 lb, accommodating moderate belt tension or lead-screw thrust without additional bearings. A double-ended smooth shaft simplifies coupling from either end, while the rotor has a moment of inertia of only 0.0026 oz-in-s², enabling quick acceleration during short indexing moves. The 3.10-inch body uses a NEMA mounting arrangement with a 2.625-inch bolt circle and 0.200-inch mounting holes, and power enters through a single receptacle connection. Class B insulation rated to 130 °C combines with 100 MΩ insulation resistance and a 340 VDC dielectric withstand rating to protect against electrical breakdown. A thermal resistance of 4.5 °C/W provides a heat-transfer path from the winding to the case. The assembly weighs 2.5 lb, allowing it to be supported by light framing in laboratory automation equipment.