Home > Nema 23 3-Phase Stepper Motor
| Item | Specifications |
|---|---|
| Step Angle Accuracy | ±5% |
| Resistance Accuracy | ±10% |
| Inductance Accuracy | ±20% |
| Temperature Rise | 80°C Max. |
| Ambient Temperature | -20°C ~ +50°C |
| Insulation Resistance | 100MΩ Min. 500VDC |
| Dielectric Strength | 500V AC 1 minute |
| Allowable Radial Load | 0.02mm Max. (450g load) |
| Allowable Thrust Load | 0.08mm Max. (450g load) |
| Model | Step Angle (°) | Length (mm) | Voltage (V) | Current (A/phase) | Resistance (Ω/phase) | Inductance (mH/phase) | Holding Torque (N・m) | Rotor Inertia (g・cm²) | Leads | Weight (kg) |
|---|---|---|---|---|---|---|---|---|---|---|
| 57BYG350-56 | 1.2 | 56 | 3.0 | 3.0 | 1.0 | 2.5 | 0.7 | 280 | 3 | 0.7 |
| 57BYG350-76 | 1.2 | 76 | 3.4 | 4.0 | 0.85 | 3.0 | 1.2 | 480 | 3 | 1.0 |
| 57BYG350-112 | 1.2 | 112 | 4.0 | 5.0 | 0.7 | 3.5 | 1.5 | 680 | 3 | 1.4 |
*These are representative models. We can manufacture products according to customer's requirements.
A 3-phase NEMA 23 stepper motor is a 57mm hybrid stepper with three windings instead of two, driven through a 3-half-bridge driver. The three phases give a 1.2° step angle (300 steps per revolution) and a smoother current waveform, which means lower vibration and better high-speed performance than a 2-phase motor of the same frame.
The difference is the winding count and how it runs. A 2-phase NEMA 23 has two windings, a 1.8° step, and uses the most common drivers. A 3-phase NEMA 23 has three windings, a 1.2° step, runs noticeably smoother with less mid-band resonance, and holds torque better at high speed — at the cost of needing a dedicated 3-phase stepper driver.
Our 57BYG350 3-phase range runs a 1.2° step angle, with holding torque from about 0.7 N·m on the 56mm body up to 1.5 N·m on the 112mm body. Rated current is around 3.0–5.0 A/phase. Full specs are in the table and the downloadable datasheet.
A 3-phase NEMA 23 needs a 3-phase stepper driver — it can't run on a 2-phase driver. The driver switches the three phases in sequence through three half-bridges. We supply a matched 3-phase driver sized and set for the motor, so the pair is ready to run.
Choose 3-phase when smoothness, low vibration, or high-speed performance matter — for example on machines sensitive to resonance or running fast. Choose the 2-phase NEMA 23 when cost and driver availability lead, since 2-phase drivers are cheaper and more common. Both share the 57mm frame; see our 2-phase nema-23-stepper-motor page for that option.
Yes. Shaft diameter and length, D-cut or flat shaft, dual-shaft output, lead length and connector, and winding voltage/current are all made to your drawing. A rear-shaft encoder and a planetary or worm gearbox are also available.
The 3-phase NEMA 23 stepper motor is a 57mm hybrid stepper built with three windings rather than two. The extra phase produces a smoother current waveform, which lowers vibration and resonance and lets the motor hold torque better at high speed. It runs at a 1.2° step angle (300 steps per revolution) and needs a 3-phase stepper driver. For machines where a 2-phase motor's vibration or mid-band resonance is a problem, the 3-phase NEMA 23 is the fix. Holding torque runs from about 0.7 N·m to 1.5 N·m depending on body length.
| Parameter | Specification |
|---|---|
| Frame Size | 57 × 57 mm |
| Step Angle | 1.2° (300 steps/rev) |
| Phase | 3-phase |
| Holding Torque | 0.7–1.5 N·m |
| Rated Current | 3.0–5.0 A/phase |
| Body Length | 56–112 mm (varies by model) |
| Drive | 3-phase driver (3 half-bridges) |
| Lead Wires | 3-wire |
A 3-phase hybrid stepper improves on a 2-phase one in a few specific ways. The benefit is motion quality, not raw torque:
The trade-off is the driver: a 3-phase motor needs a dedicated 3-phase stepper driver, which is less common and costs more than a 2-phase one.
The 3-phase NEMA 23 suits machines where motion quality matters:
With a gearbox the same frame drives a low-speed, high-torque axis; a dual-shaft version adds a rear shaft for an encoder.
Both are 57mm frames. The choice is about motion quality versus cost:
| 3-Phase NEMA 23 | 2-Phase NEMA 23 | |
|---|---|---|
| Step Angle | 1.2° | 1.8° |
| Vibration | Lower | Moderate |
| High-speed torque | Better | Good |
| Driver | 3-phase (less common) | 2-phase (common, cheaper) |
| Cost | Higher | Lower |
Pick 3-phase when smooth, low-vibration, high-speed motion matters. Pick the 2-phase NEMA 23 stepper motor when cost and driver availability lead. Both are 57mm, so they share mounting.
Cymotorix 3-phase NEMA 23 stepper motors can be customized for OEM integration. As a 3-phase NEMA 23 stepper motor manufacturer and supplier, we produce them to your specification. Common modifications include:
A 3-phase NEMA 23 runs only on a 3-phase stepper driver, which switches the three windings in sequence through three half-bridges. It will not run on a standard 2-phase driver. Rated current is around 3.0 to 5.0 A per phase, so the driver must be sized accordingly. We supply a matched 3-phase driver set up for the motor if you want the pair tested together.
Recommended supply voltage is 24–48VDC. A higher bus voltage holds torque at speed, which is part of why the 3-phase motor performs well at higher RPM. Set the driver's current limit to the motor's rated current so the windings don't overheat.
