57J1876-447 Medium Torque NEMA23 Stepper Motor - 2 N·m

A Dependable Medium Torque NEMA23 Stepper Motor at 2 N·m

The 57J1876-447 is a Medium Torque NEMA23 Stepper Motor, a 2-phase 57 mm-frame motor, 76 mm long, delivering 2.0 N·m at 4.7 A with an 8 mm shaft. It offers a dependable middle torque range for equipment that needs predictable positioning without a long frame.

Predictable Torque for Automation

Two N·m covers much of the real-world motion-control workload, including light robots, registration rollers and positioning mechanisms. The 4.7 A current and 8 mm shaft integrate cleanly with standard hardware.

Engineering Data

• Frame: NEMA23 (57 mm)
• Body length: 76 mm
• Phase current: 4.7 A
• Holding torque: 2.0 N·m
• Shaft: 8 mm
• Type: 2-phase, open-loop

Robotics and Motion Control Applications

The motor suits light robot joints, compact positioning stages and packaging registration mechanisms where torque and repeatability are required without feedback. Open-loop stepping keeps the control path simple and cost-effective, and the 76 mm length fits within standard NEMA23 mounting bays. Integrators often pair it with a microstepping drive to smooth low-speed motion on delicate payloads.

Thermal Behaviour

Controlled heating preserves torque through repeated cycles, supporting continuous-duty automation. The 4.7 A rating is moderate for the frame, so the motor runs acceptably in panels that lack forced ventilation when duty is intermittent.

Where 2 N·m Fits in the NEMA23 Range

This rating sits in the middle of the NEMA23 family: enough torque for most light-to-mid automation, without the longer body or higher inertia of the 112 mm unit. For machines that standardize on one frame size, the 76 mm body is a practical default that leaves room in the motor cavity for wiring and access.

Mounting

Standard NEMA23 interface and 8 mm shaft ease retrofit into existing mechanisms and coupling stocks. Select a driver rated for at least 4.7 A, confirm the supply voltage for your target speed, and verify the load torque at operating RPM on the torque-speed curve. Lyenwsin provides the motor with matched drives and application support for automation integrators.