6.8A 3-Phase Stepper Motor with 28 N·m Holding Torque

The 130J12220-368 is a 6.8A 3-Phase Stepper Motor in a NEMA52 frame, delivering 28 N·m of holding torque for open-loop positioning of heavy loads. With a 220 mm body length and a 19 mm output shaft, it is built for applications where large inertia must be moved and held across repeated machine cycles, such as heavy CNC axis feed and rotary table indexing.

High-Torque Three-Phase Stepper for Heavy Positioning Loads

The motor operates on open-loop step control, so positioning is deterministic without positional feedback. This frame and torque class is typically chosen where large inertia must be moved and held in place across repeated machine cycles, and where a servo system would be over-engineered.

Torque and Thermal Behaviour

Three-phase excitation reduces commutation torque ripple compared with two-phase designs, which lowers audible noise and vibration during motion. Because the winding is wound to run at 6.8 A, the motor is engineered with low magnetizing losses to keep body temperature down even on sustained duty cycles. Lower heating also improves repeatability in enclosed machine cavities where ventilation is limited.

Construction and Shaft

The 19 mm shaft transmits torque to couplings, timing pulleys, and lead screws without deflection under rated load. All structural parts use high-quality magnet and lamination materials, and the small stator-rotor air gap keeps positioning consistent as the motor warms up.

Key Specifications

• Type: 3-phase open-loop stepper motor
• Frame size: NEMA52
• Body length: 220 mm
• Phase current: 6.8 A
• Holding torque: 28 N·m
• Shaft diameter: 19 mm

Intended Applications

The holding torque and NEMA52 envelope suit it for compact CNC equipment, packaging machinery, factory automation, compact robotic mechanisms, textile machinery, printing machinery, and food processing where a medium- to high-torque axis is required. Rotary table indexing and heavy-load CNC axes are typical examples.

Selection Guidance

Match this motor to a 3-phase stepper drive rated for at least 6.8 A per phase. Because it is open-loop, the drive simply issues step and direction pulses; no tuning or encoder wiring is required, which shortens commissioning time on multi-axis machines. Lyenwsin can help you confirm the drive pairing and mechanical integration.