• 2 phase, NEMA23 frame size
• 43 mm long
• 2.0 A phase current
• 0.75 N.m holding torque
• 6.35 mm shaft size
• Built with high quality materials.High precision, low motor heating, and low vibration。
The 57J1841-420 is the shortest NEMA23 (57 mm) motor in this range at 43 mm, delivering 0.75 N·m at 2.0 A with a 6.35 mm shaft. It targets light-duty mechanisms where a compact body is the primary constraint.
At 0.75 N·m the motor drives light conveyors, small rotary indexes and label-feed rollers. The low 2.0 A current simplifies the electrical path and keeps the driver and supply small, ideal for space-constrained motion control.
The short body and low inertia make the motor suitable for small robotic fingers, light linkages and positioning mechanisms that cycle quickly with small loads. The 2.0 A rating pairs with small, low-cost drivers.
The modest current inherently limits heating, supporting reliable operation in enclosed, thermally sensitive designs.
Standard NEMA23 pattern with a 6.35 mm shaft. Confirm coupling bore and bracket spacing when specifying.
| Model | 57J1841-420 |
| Phase | 2 |
| Step Angle（deg） | 1.8 |
| Holding Torque(N·m) | 0.75 |
| Rated Current（A） | 2 |
| Phase Resistance(ohm) | 1.3 |
| Phase Inductance（mH） | 3.2 |
| Detent Torque（mN·m） | 250 |
| Rotor inertia（g·cm²） | 157 |
| Insulation Class | B |
| Number of Leads | 4 |
| Weight（kg） | 0.4 |
| Length（mm） | 43 |
| Matched Drive | 2DM556-RC/EC 2DM442 |
| Frame Size（NEMA） | 23 |
| Shaft Diameter（mm） | 6.35 |
| Frame Size(mm) | 57 |
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