Permanent-magnet linear stepper motors are widely used; typical applications include medical equipment, office equipment, mechanical automation, precision control for gas and fluid pumps, smart home devices, and other applications requiring precise linear motion.
| Motor Outer Diameter (mm) | Lead Screw Diameter (mm) | Maximum Thrust (N) | Recommended Maximum Load (N) |
|---|---|---|---|
| Φ15 | 3.0 | 10 | 8 |
| Φ20 | 3.5 | 50 | 30 |
| Φ25 | 3.5 | 90 | 60 |
| Φ36 | 6.35 | 160 | 110 |
| Φ46 | 6.35 | 250 | 180 |
After selecting the appropriate motor size based on thrust requirements, the lead of the lead screw must also be chosen by considering speed and acceleration.
The speed of a linear stepper motor is inversely proportional to its thrust; that is, increasing the operating speed results in a corresponding decrease in thrust. To refine your selection of the motor and lead screw, please refer to the speed-versus-thrust curves specific to each motor size.
While these steps provide a foundation for selecting a motor and lead screw, other variables must also be taken into account:
· Duty cycle · System lifespan · Environmental factors · Repeatability (positioning accuracy)
· Noise and vibration requirements · Acceptable backlash · Acceleration/deceleration requirements
· Drive conditions · Horizontal or vertical mounting orientation
The following charts illustrate various combinations of motor diameter, lead screw pitch (lead), and step angle:
| Motor Outer Diameter (mm) | Lead Screw Diameter (mm) | Screw Lead (mm/rev) | Travel per Step at 7.5° (mm) | Travel per Step at 15° (mm) | Travel per Step at 18° (mm) | Maximum Thrust (N) |
|---|---|---|---|---|---|---|
| Φ15 | 3 | 0.4 | — | — | 0.02 | 10 |
| Φ15 | 3 | 0.5 | — | — | 0.025 | 10 |
| Φ15 | 3 | 1 | — | — | 0.05 | 10 |
| Φ20 | 3.5 | 0.6096 | 0.0127 | 0.0254 | — | 50 |
| Φ20 | 3.5 | 1.292 | 0.0254 | 0.0508 | — | 50 |
| Φ20 | 3.5 | 2.4384 | 0.0508 | 0.102 | — | 50 |
| Φ25 | 3.5 | 0.6096 | 0.0127 | 0.0254 | — | 90 |
| Φ25 | 3.5 | 1.292 | 0.0254 | 0.0508 | — | 90 |
| Φ25 | 3.5 | 2.4384 | 0.0508 | 0.102 | — | 90 |
| Φ36 | 6.35 | 0.6096 | 0.0127 | 0.0254 | — | 160 |
| Φ36 | 6.35 | 1.292 | 0.0254 | 0.0508 | — | 160 |
| Φ36 | 6.35 | 2.4384 | 0.0508 | 0.102 | — | 160 |
| Φ46 | 6.35 | 0.6096 | 0.0127 | — | — | 250 |
| Φ46 | 6.35 | 1.292 | 0.0254 | — | — | 250 |
| Φ46 | 6.35 | 2.4384 | 0.0508 | — | — | 250 |
1. Step size = (step angle / 360) × lead (mm).
2. Our company offers a wider range of lead or step size options; parameters can also be customized according to customer requirements.
| Parameter | Unit | Φ15 | Φ20 | Φ25 | Φ36 | Φ46 |
|---|---|---|---|---|---|---|
| Frame Size | mm | 15 | 20 | 25 | 36 | 46 |
| Winding Type | — | Bipolar | Unipolar / Bipolar | Unipolar / Bipolar | Unipolar / Bipolar | Unipolar / Bipolar |
| Motor Configuration | — | External | Captive / Non-Captive / External | Captive / Non-Captive / External | Captive / Non-Captive / External | Non-Captive / External |
| Step Angle | ° | 18 | 7.5 / 7.5 / 15 / 15 | 7.5 / 7.5 / 15 / 15 | 7.5 / 7.5 / 15 / 15 | 7.5 / 7.5 |
| Operating Voltage | V | 4 / 5 / 12 | 5 / 12 / 5 / 12 | 5 / 12 / 5 / 12 | 5 / 12 / 5 / 12 | 5 / 12 |
| Current per Phase | mA | 200 / 160 / 70 | 370 / 160 / 370 / 160 | 370 / 160 / 370 / 160 | 560 / 230 / 560 / 230 | 1000 / 410 |
| Resistance per Phase | Ω | 20 / 31 / 180 | 13.5 / 74.5 / 13.5 / 76 | 13.5 / 70 / 13.5 / 70 | 9 / 52 / 9 / 52 | 5 / 29 |
| Inductance per Phase | mH | 5.6 / 8.7 / 48.8 | 6 / 38.5 / 4 / 25 | 12.5 / 65 / 9.5 / 47 | 11.5 / 72 / 8 / 56 | 9 / 52 |
| Power | W | 1.6 | 3.4 | 3.85 | 5.6 | 10 |
| Rotor Inertia | g·cm² | 0.9 | 1.05 | 1.08 | 8.5 | 25 |
| Insulation Class | — | Class B | Class B | Class B | Class B | Class B |
| Insulation Resistance | MΩ | 100 | 100 | 100 | 100 | 100 |
| Weight | g | 28 | 35 | 50 | 120 | 250 |
Changzhou Xinghua Electric Co., Ltd. is a high-tech enterprise dedicated to the R&D, production, and sales of miniature stepper motors, synchronous motors, and stepper gear motors.Its products are widely used in office printing and copying equipment, surveillance systems, medical devices, access control systems, scanners, toys, sanitary ware, lighting fixtures, and valve control applications.
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