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Stepper Motor Spec Table
Stepper Motor Specifications — 12 sizes
NEMANEMA ICS 16
A motor that rotates in fixed angle steps per pulse signal, enabling open-loop position control. Used in 3D printers, CNC, and semiconductor equipment.
Practical Notes
- Stepper motor torque drops sharply with speed (T-N curve). Rated torque is low-speed holding torque — verify torque at actual operating speed.
Selection Guide
Open-loop precision positioning without encoders. Suitable for low-speed, high-torque applications at lower cost than servos. Torque drops sharply at high speeds; consider servos for high-speed needs. Common in 3D printers, small CNC, and instruments.
NEMAStepper Motor
6 sizesThe dimensions below are identical across NEMA · NEMA ICS 16.
| Nominal | Type | Frame | Torque | Volt/Current | Use |
|---|---|---|---|---|---|
| NEMA11 | Stepper Motor | 28 | 0.06~0.09 | 3.5~12V/0.5~1.0A | SmallPrecision |
| NEMA14 | Stepper Motor | 35 | 0.09~0.18 | 3.5~12V/0.5~1.2A | SmallCNC, Camera |
| NEMA17 | Stepper Motor | 42 | 0.2~0.6 | 12~24V/1.0~2.0A | 3DPrinter, SmallCNC |
| NEMA23 | Stepper Motor | 57 | 0.6~3.0 | 24~48V/2.0~4.5A | CNCRouter, Engraver |
| NEMA34 | Stepper Motor | 86 | 3.0~12.0 | 48~80V/4.0~8.0A | LargeCNC, Industrial |
| NEMA42 | Stepper Motor | 110 | 12.0~28.0 | 48~110V/6.0~10.0A | Large Industrial |
Key Features
- One pulse = fixed step angle (1.8°/0.9°) rotation; open-loop position control
- NEMA 17/23/34 frame sizes; holds position with holding torque when stationary
- Microstepping (1/2–1/256) improves resolution and suppresses low-speed vibration
Key Applications
3D printer axis drive, CNC routers, packaging indexing, CCTV pan-tilt, valve actuators
FAQ
What is step loss (stalling) in stepper motors?
When load torque exceeds motor output, the motor skips designated steps. Open-loop control cannot detect step loss. Ensure 50%+ safety margin or add an encoder.