86J12126-623 6.78 N·m 3-Phase Stepper Motor, NEMA34

An Energy-Efficient 6.78 N·m 3-Phase Stepper Motor

The 86J12126-623 is a 6.78 N·m 3-Phase Stepper Motor in a NEMA34 (86 mm) frame, drawing only 2.3 A per phase to produce 6.78 N·m of holding torque. Its 126 mm body and 14 mm shaft keep it compatible with standard NEMA34 hardware while the low-current winding reduces the electrical load on the drive and power supply.

Efficiency by Design

A 2.3 A winding that still delivers over 6 N·m indicates a well-optimized magnetic circuit. Less current means less resistive heating, so the motor stays cooler and its performance remains consistent during long shifts. Three-phase excitation further smooths torque, giving low vibration and quiet running in operator-adjacent machinery.

Shaft and Mount

The 14 mm shaft couples to standard industrial hardware. The NEMA34 flange provides a rigid mount. As an open-loop motor, it needs no feedback, so control is a matter of supplying step and direction pulses from a compatible 3-phase drive.

Key Data

• Type: 3-phase open-loop stepper motor
• Frame size: NEMA34 (86 mm)
• Body length: 126 mm
• Phase current: 2.3 A
• Holding torque: 6.78 N·m
• Shaft diameter: 14 mm

Applications That Favor Low Current

Its balance of torque and modest current draw fits compact CNC equipment, packaging machinery, factory automation, compact robotic mechanisms, textile machinery, printing machinery and food processing. Where several axes share one cabinet, the lower aggregate current simplifies power supply selection and helps keep panel temperature down.

Selection Advice

Pair it with a 3-phase drive output at or above 2.3 A per phase. Verify the torque-speed curve meets the required torque at operating speed, and confirm the coupling bore accepts the 14 mm shaft. For multi-axis machines, the low current also means smaller wiring and circuit protection. Lyenwsin can supply the drive, motor and supporting components as a coordinated package with technical guidance.