N31HMFJ-LNK-NS-00 Pacific Scientific
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The Pacific Scientific N31HMFJ-LNK-NS-00 is a stepper motor in the POWERPAC N Stepper Motors series, built with a NEMA 34 3.38-inch square frame and heavy duty mounting. It features a holding torque of 4.6 Nm, 200 full steps per revolution, and 1.8 degree step angle. The motor is constructed with an 8 lead laminated rotor, single straight key shaft, and an insulation voltage rating of 340 Vdc.
Internal Product Review
The N31HMFJ-LNK-NS-00 is a Pacific Scientific stepper motor built in a NEMA 34 frame with 4.6 Nm holding torque. A 1.8° step angle and ±3% step accuracy support dependable positioning in indexing and feed applications. Heavy-duty NEMA mounting adds practical machine integration, making the motor a strong choice for consistent motion control.
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Product Description:
The N31HMFJ-LNK-NS-00 is a stepper motor produced by Pacific Scientific as part of the POWERPAC N Stepper Motors series. Built with standard construction and a standard winding, the unit is intended for open-loop position and speed control in automated indexers, packaging stations, and compact gantry axes. It translates pulse trains from a drive into precise angular increments, allowing mechanical loads to be positioned repeatably without closed-loop sensors. This operating method makes the motor suitable for applications that rely on predictable step commands and controlled acceleration profiles.
The motor fits the NEMA 34 envelope and has a 3.38-inch square frame, allowing installation on compatible heavy-duty NEMA mounts. Its stator stack is 94 mm long, which helps limit the installation depth required by the motor body. The motor has a single shaft end machined with a straight key for positive torque transfer. No shaft seal is fitted, so external protection is required when the motor may be exposed to fluids. A laminated rotor and one magnetic stack establish the torque profile, while the eight-lead configuration permits series or parallel coil wiring. Electrical entry is splash-resistant and uses a conduit terminator with metric PG11 threads for connection to compatible fittings. The conductors are routed through the terminator to a terminal board inside the housing. The motor delivers 4.6 Nm of holding torque, providing substantial static load capacity while the shaft is stationary. It produces 200 full steps per revolution, supporting consistent incremental movement when operated in full-step mode.
Each commanded step advances the shaft by 1.8°. Cumulative positioning error is limited to ±3% over a full revolution, supporting repeatable indexing in open-loop applications. The motor does not use an encoder, so position is established from the pulse sequence sent by the drive. Its insulation system is rated for 340 VDC, providing electrical separation suitable for operation with higher-voltage stepper drives. Insulation resistance between the windings and frame is 100 megohms, which helps resist leakage current through moisture or contamination inside the conduit-fed housing. Proper drive settings and suitable acceleration ramps help prevent missed steps when the motor starts, stops, or changes direction under load.
