Product Description:

As part of the POWERMAX II M Motors series, the M22NRXB-LNF-NS-00 from Pacific Scientific is a two-phase stepper motor used for indexed or constant-speed positioning in industrial automation equipment. The model follows the NEMA mounting pattern, so it can drop into common motion stages and actuators. Its enhanced construction allows precise open-loop control without the need for encoder feedback.

The motor follows the NEMA 23 frame standard with a 66.670 mm mounting bolt circle and a 38.1 mm pilot diameter, allowing direct coupling to gearboxes or index tables. A single, flat 6.35 mm shaft extends 19.1 mm beyond the face to transmit torque while keeping backlash low. Radial and axial bearing limits are rated at 89 N and 58 N, respectively, supporting moderate belt or lead-screw side loads. Each electrical step advances the rotor by 1.8 degrees, so the full 200-step revolution can hold position to within ±1.5 % accuracy. Rotor inertia of 0.0000252 kg·m² balances quick acceleration with stable mid-range speeds. The specified operating window of -20 °C to +40 °C covers most cabinet or machine environments.

The stator winding is type B and is divided into 2 stacks fed through a regular leadwire receptacle, matching the connection style specified as Regular/leadwire and keeping the overall body length to 78.7 mm. Total mass is 1.13 kg, and the insulation system is rated Class B, 130 °C with 100 MΩ resistance and a 340 Vdc dielectric withstand. With two phases driven in sequence, the rotor advances through 200 full-step positions per turn, and the flat, single shaft of 6.35 mm diameter simplifies coupling to pulleys or couplings. The motor uses the standard rotor design and NEMA mounting style, and ships without an integral encoder for open-loop positioning.