4.5 N·m 3-Phase Stepper Motor, NEMA34 2.0 A

A Light-Current NEMA34 Stepper at 4.5 N·m

The 86J12103-650 is a 4.5 N·m 3-Phase Stepper Motor in a NEMA34 (86 mm) frame, rated at 4.5 N·m of holding torque from a 2.0 A per-phase winding. With a short 103 mm body and a 12 mm shaft, it is a practical choice for compact axes where space and drive capacity are both limited.

Low Current, Low Heat, Low Noise

With only 2.0 A per phase, the motor generates limited winding heat, supporting stable torque over long runs. Three-phase excitation minimizes step ripple, so vibration and audible noise stay low. These characteristics suit machinery that runs near operators or where smooth motion directly affects output quality.

Mechanical Fit

The 12 mm shaft is sized for lighter couplings and belt drives. The NEMA34 flange gives a stable mount. Open-loop control keeps the wiring scheme simple, requiring only pulse and direction signals from the drive.

Specifications

• Type: 3-phase open-loop stepper motor
• Frame size: NEMA34 (86 mm)
• Body length: 103 mm
• Phase current: 2.0 A
• Holding torque: 4.5 N·m
• Shaft diameter: 12 mm

Intended Applications

It is well matched to compact CNC equipment, packaging machinery, factory automation, compact robotic mechanisms, textile machinery, printing machinery and food processing. Robotics and handling systems that need a NEMA34 flange with moderate torque benefit from the low current and light body, which reduce both panel load and moving mass on the axis.

Drive Compatibility

Select a 3-phase drive rated for at least 2.0 A per phase. The low current requirement allows a smaller, cost-effective drive while still providing dependable positioning for light-to-medium automation loads. Confirm the 12 mm coupling bore and check the duty cycle so the motor thermal limits are respected. As a distributor, Lyenwsin can match the motor with drives and cables from stock to keep your project moving.