• 3 phase, NEMA23 frame size
• 79 mm long
• 5.8 A phase current
• 1.5 N.m holding torque
• 8 mm shaft size
• Built with high quality materials.High precision, low motor heating, and low vibration。
The 57J1276-658 is a 1.5 N·m 3-Phase Stepper Motor in a NEMA23 (57 mm) frame, delivering 1.5 N·m of holding torque at a 5.8 A per-phase current. Its 79 mm body is a practical size for light handling and positioning mechanisms that need dependable repeatability rather than high torque.
Three-phase excitation gives smooth, low-vibration stepping, which helps maintain accuracy in indexing tasks and reduces acoustic noise in operator-adjacent equipment. The 5.8 A winding provides strong peak response for its size while the design controls temperature rise over moderate duty cycles.
The 8 mm shaft connects to light couplings and pulleys. Open-loop control keeps wiring to step and direction signals only. The NEMA23 flange is a standard, widely sourced mounting dimension that fits existing brackets.
It is suited to motion control in compact CNC equipment, desktop CNC systems, robotics, packaging machinery, factory automation, textile machinery, printing machinery, food processing and light-duty handling and positioning mechanisms. Indexing turntables, small pick-and-place cells and registration rollers all benefit from the smooth, low-noise step output.
Choosing an open-loop stepper instead of a servo removes the cost of an encoder and the time spent on gain tuning. For machines with well-defined, repeatable loads this keeps the control path predictable and the total bill of materials lower. The 5.8 A rating must be matched by the drive, and the wiring should follow the drive manual to avoid heating at the connectors.
Match it to a 3-phase drive rated for at least 5.8 A per phase. For light-duty positioning the motor provides a simple, reliable open-loop solution without encoder feedback or gain tuning. Verify the axis inertia and operating speed against the torque-speed curve, and confirm the 8 mm coupling bore. Lyenwsin can supply the motor with a matching drive and wiring to shorten your procurement cycle.
| Model | 57J1276-658 |
| Phase | 3 |
| Step Angle（deg） | 1.2 |
| Holding Torque(N·m) | 1.5 |
| Rated Current（A） | 5.8 |
| Phase Resistance(ohm) | 0.86 |
| Phase Inductance（mH） | 2 |
| Detent Torque（mN·m） | 700 |
| Rotor inertia（g·cm²） | 480 |
| Insulation Class | B |
| Number of Leads | 6 |
| Weight（kg） | 1.1 |
| Length（mm） | 79 |
| Matched Drive | 3DM783 |
| Frame Size（NEMA） | 23 |
| Shaft Diameter（mm） | 8 |
| Frame Size(mm) | 57 |
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