Product Description:

Pacific Scientific manufactures the T22NRHJ-LDN-NS-00 stepper motor in the T High Torque Motors series. This two-phase motor converts pulse trains from an indexer or micro-stepping drive into incremental shaft movement for feeders, gantries, and small automated tooling. By relying on magnetically locked rotor teeth rather than feedback transducers, it provides repeatable open-loop motion while keeping the control architecture straightforward. That operating style makes it suitable for positioning applications where predictable step response is more important than closed-loop feedback.

The motor uses the NEMA 23 mounting envelope, which gives it a standardized face size for common machine plates and brackets. Its holding torque is 1.98 N·m, allowing the shaft to maintain position when rated current is applied. Each input pulse advances the rotor by 1.8°, so one full revolution requires 200 full steps. The windings draw 4.1 A DC per phase, which supplies the magnetic force needed for commanded motion while helping control resistive heating. Rotor inertia is 0.0000395 kg·m², supporting responsive acceleration on light and medium loads. The body length is 77.7 mm, which gives the motor a compact form while still providing useful thermal mass for continuous operation.

Mechanical loading tolerances reach 111 N in the axial direction and 67 N in the radial direction, so light couplings and pulleys can often be supported directly by the motor. The phase resistance is 0.49 ohm, which affects current rise and the drive voltage needed for good step response at higher speeds. The unpowered detent torque of 0.042 N·m provides modest passive holding when current is removed. With a mass of 1 kg, the motor can be used on moving carriages and compact axes without adding excessive weight. These electrical and mechanical values fit light-duty indexing and positioning tasks that require consistent incremental motion.