• 3 phase, NEMA23 frame size
• 85 mm long
• 5.8 A phase current
• 1.8 N.m holding torque
• 8 mm shaft size
• Built with high quality materials.High precision, low motor heating, and low vibration。
The 57J1285-658 is a 1.8 N·m 3-Phase Stepper Motor in a NEMA23 (57 mm) frame, rated at 1.8 N·m of holding torque. Its 5.8 A winding supports responsive motion in the compact frames used across desktop automation, robotics and light machinery, and the 85 mm body and 8 mm shaft keep it inside the common NEMA23 ecosystem.
Three-phase excitation in a small frame yields notably smooth step transitions with low vibration, which is important for applications handled at high cycle rates or where quiet operation matters. The winding is designed to keep heating contained even when the drive holds the axis at torque during indexing pauses.
The 8 mm shaft fits small couplings and timing pulleys used in NEMA23 systems. Open-loop control makes the motor simple to commission: feed it step and direction pulses and it positions deterministically. The NEMA23 flange is a common industrial standard, so mounting is straightforward.
It suits motion control in compact CNC equipment, desktop CNC systems, robotics, packaging machinery, factory automation, textile machinery, printing machinery and food processing. Robotics arms and handling cells that need smooth low-speed motion without a servo budget are a natural fit.
Choose a 3-phase drive capable of at least 5.8 A output per phase. For a small frame the current rating is relatively high, so confirm the drive can hold that output while keeping the motor within its thermal limits during continuous running. Check the coupling bore for the 8 mm shaft and review the torque-speed curve for your operating RPM. Lyenwsin offers matched drives and technical support for this frame class.
| Model | 57J1285-658 |
| Phase | 3 |
| Step Angle（deg） | 1.2 |
| Holding Torque(N·m) | 1.8 |
| Rated Current（A） | 5.8 |
| Phase Resistance(ohm) | 0.69 |
| Phase Inductance（mH） | 2 |
| Detent Torque（mN·m） | 800 |
| Rotor inertia（g·cm²） | 550 |
| Insulation Class | B |
| Number of Leads | 6 |
| Weight（kg） | 1.2 |
| Length（mm） | 85 |
| Matched Drive | 3DM783 |
| Frame Size（NEMA） | 23 |
| Shaft Diameter（mm） | 8 |
| Frame Size(mm) | 57 |
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