Home > Nema 11 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) |
| 28BYG250-32 | 1.8 | 32 | 3.7 | 0.67 | 5.6 | 3.4 | 0.06 | 9 | 4 | 0.11 |
| 28BYG250-45 | 1.8 | 45 | 3.2 | 0.95 | 3.4 | 1.2 | 0.075 | 12 | 4 | 0.14 |
| 28BYG250-51 | 1.8 | 51 | 4.3 | 0.95 | 4.6 | 1.8 | 0.09 | 18 | 4 | 0.16 |
*These are representative models. We can manufacture products according to customer's requirements.
The NEMA 11 holding torque depends on body length. Our 28BYG250 range runs from about 0.05 N·m on the 31mm body up to 0.12 N·m on the 51mm body, all at a 1.8° step angle. Pick the longer body when you need more torque in the same 28mm footprint.
A NEMA 11 stepper motor has a 28mm × 28mm faceplate. Body length varies by model — ours run 31mm, 39mm, 45mm, and 51mm. The shaft is typically 5mm diameter; full dimensions are in the spec table and the downloadable datasheet.
Yes. Our NEMA 11 motors are 2-phase bipolar hybrid steppers, 1.8° step angle (200 steps per revolution), supplied with 4 lead wires as standard. A 6-wire version is available on request.
A NEMA 11 runs on any standard 2-phase stepper driver. Rated current is low (around 0.67–1.0 A/phase), so a compact microstepping driver handles it easily. We can supply a matched driver sized and set for the motor. Recommended supply is 12–24VDC.
Yes. Shaft diameter and length, D-cut or flat shaft, lead length and connector (JST, Molex, or bare leads), and winding voltage/current are all made to your drawing. A rear-shaft extension for an encoder and a planetary gearbox are also available.
If your load fits within about 0.12 N·m and the footprint must stay at 28mm, NEMA 11 is right. If you need more torque or higher speed, step up to NEMA 17 (42mm). The comparison table below lays out the difference.
The NEMA 11 stepper motor has a 28mm × 28mm faceplate — one size up from the NEMA 8. It packs more holding torque than a NEMA 8 while staying small enough for tight enclosures, which makes it a common pick for compact devices that need a bit more drive than the smallest frame can give. A 2-phase NEMA 11 hybrid stepper motor delivers holding torque up to about 0.12 N·m, depending on body length, at a 1.8° step angle. NEMA 11 dimensions are fixed at a 28mm faceplate, with body length the main variable.
| Parameter | Specification |
|---|---|
| Frame Size | 28 × 28 mm |
| Step Angle | 1.8° (200 steps/rev) |
| Phase | 2-phase (bipolar) |
| Holding Torque | Up to 0.12 N·m |
| Rated Current | 0.67–1.0 A/phase |
| Body Length | 31–51 mm (varies by model) |
| Weight | 100–160 g |
| Lead Wires | 4-wire or 6-wire |
NEMA 11 stepper motors suit compact devices that need more torque than a NEMA 8 but still have to fit a small space. Common applications include:
With a NEMA 11 gearbox the same frame drives a small linear actuator or a low-speed, high-torque axis.
The next size up from NEMA 11 is NEMA 17 (42mm × 42mm), the most common stepper frame. Here is a quick comparison:
| NEMA 11 (28mm) | NEMA 17 (42mm) | |
|---|---|---|
| Faceplate | 28 × 28 mm | 42 × 42 mm |
| Max Holding Torque | ~0.12 N·m | ~0.45 N·m |
| Weight | 100–160 g | 200–400 g |
| Best For | Compact, light-to-medium load | General-purpose, higher torque |
If your load needs more than about 0.12 N·m or you want headroom for higher speed, move up to NEMA 17. If the footprint has to stay at 28mm and the load is light to medium, NEMA 11 is the right fit.
Cymotorix NEMA 11 stepper motors can be customized for OEM integration. As a NEMA 11 stepper motor manufacturer and supplier, we produce them to your specification. Common modifications include:
NEMA 11 motors are 2-phase bipolar steppers, so they run on any standard 2-phase stepper driver. Rated current is low — around 0.67 to 1.0 A per phase — so a compact microstepping driver with current regulation is enough, and gives the smoothest motion. We can supply a driver matched and set to the motor if you want the pair tested together.
Recommended supply voltage is 12–24VDC. A higher bus voltage improves high-speed torque, but set the driver's current limit correctly so the windings don't overheat.
