Product Description:

The N31HRHK-LEK-SS-02 is a Pacific Scientific motor in the POWERPAC N Stepper Motors series. In automated indexers, pick-and-place axes, and small gantry drives, it advances the load by uniform angular increments that correspond to incoming pulse trains, eliminating the need for a feedback loop. A double-ended shaft permits a rear-mounted encoder, while the front straight-key end couples directly to pulleys or couplings. Heavy-duty NEMA mounting holes align with standard end bells, and the laminated rotor keeps inertia low for rapid start-stop motion.

The motor uses a 3.38 in. square frame and follows the NEMA 34 outline, so it fits standard mounting brackets used for that size. Within this housing, a single stator stack delivers a rated holding torque of 4.6 Nm, which is suitable for medium-mass tables that must remain locked when power is removed. Each full rotation is divided into 200 discrete steps created by a physical step angle of 1.8°, and these values describe its positioning resolution and motion smoothness. The rotor's laminated core and the standard winding set keep detent torque moderate, allowing microstepping drives to interpolate finer increments without pronounced cogging.

Total case length is 94 mm, so the unit fits inside compact enclosures while leaving space for an inline brake or encoder canister. Electrical isolation is rated at 100 Megohms and withstands up to 340 Vdc between the windings and frame, making it suitable for grounded metal machine frames. A step accuracy of ±3% supports repeatable tool positioning across the travel envelope. Standard construction, a regular lead-wire connection style, and a 4-lead parallel harness simplify wiring to bipolar drivers, and the single-stack, standard-wound stator avoids unnecessary heat rise during continuous dwell.