15BY Mini 15mm 2-Phase 4-Wire Gear Stepper Motor Metal Gearbox
15BY Mini 15mm 2-Phase 4-Wire Gear Stepper Motor Metal Gearbox
15BY Mini 15mm 2-Phase 4-Wire Gear Stepper Motor with Full Metal Gearbox
Upgrade your DIY electronics and precision engineering projects with the 15BY Mini Gear Stepper Motor. This compact 15mm micro stepping motor features a full metal gearbox with an approximate 1:34.75 reduction ratio, delivering smooth, precise, and repeatable motion control. Ideal for makers, engineers, and hobbyists who demand accuracy in a tiny package.
Made in Mainland China.
Key Features
- 2-Phase, 4-Wire Design: Industry-standard wiring for easy integration with most stepper motor driver boards.
- All Metal Gearbox: Durable full metal gear reducer for long-lasting performance and consistent torque output.
- High Reduction Ratio (~1:34.75): Approximately 695 pulse signals required for one full 360° rotation of the output shaft — ideal for precise positioning tasks.
- Low Step Angle: Motor step angle of 18°; output shaft step angle of approximately 0.52° for fine-grained motion control.
- Compact 15mm Form Factor: Fits into space-constrained builds and miniature mechanical assemblies.
- Wide Application Range: Commonly used in monitoring equipment, communication devices, precision instruments, and robotic mechanisms.
Technical Specifications
| Motor Type | 2-Phase 4-Wire Stepper Motor |
| Motor Diameter | 15mm |
| Reduction Ratio | ~1:34.75 |
| Step Angle (Motor) | 18° |
| Step Angle (Output Shaft) | ~0.52° |
| Pulses per Revolution | ~695 |
| Phase Resistance | 19.7 Ω (6V, short-circuit current: 280mA) |
| Gearbox Material | Full Metal |
| Package Contents | 1 × Gear Stepper Motor |
| Battery Included | No |
| Wireless | No |
⚠️ Important Notice
An external stepper motor driver is required to operate this motor. Direct connection to a power supply will NOT cause the motor to run. Please ensure you have a compatible 2-phase stepper motor driver before use.
Ideal For
- DIY robotics and automation projects
- Precision instrument mechanisms
- Monitoring and communication equipment
- Camera sliders and pan-tilt systems
- CNC and motion control builds
- Educational and prototyping applications
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Frequently Asked Questions
Q: Does the 15BY gear stepper motor work when connected directly to a power supply?
A: No. The 15BY 2-phase 4-wire gear stepper motor requires an external stepper motor driver to function. Direct connection to a power supply will not produce motor movement. You must use a compatible stepper driver board to send the required pulse signals.
Q: How many pulse signals are needed for one full rotation of the output shaft?
A: Approximately 695 pulse signals are required for the output shaft to complete one full 360° rotation, thanks to the ~1:34.75 metal gear reduction ratio. The output shaft step angle is approximately 0.52°, enabling very precise positional control.
Q: What types of projects is this mini stepper motor suitable for?
A: This micro gear stepper motor is well-suited for a wide range of DIY and professional applications including robotics, precision instruments, monitoring and communication equipment, camera pan-tilt rigs, CNC machines, and any project requiring compact, accurate motion control.
Q: What is the phase resistance and operating current of this motor?
A: The phase resistance is 19.7 ohms. At 6V, the short-circuit current is approximately 280mA. Please factor these values into your driver and power supply selection for optimal performance.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.