10pcs Miniature 2-Phase 4-Wire Stepper Motors 4.5mm & 4.9mm DIY

Precision Miniature Stepper Motors for DIY Projects & Camera Lens Builds

Get ultra-precise movement control in a tiny package! This pack of 10 miniature 2-phase 4-wire stepper motors is perfect for hobbyists, engineers, and makers working on DIY camera lens actuators, micro robotics, precision positioning systems, and small automation projects. Available in two sizes — 4.5mm and 4.9mm outer diameter — these metal-construction permanent magnet stepper motors deliver reliable, repeatable micro-motion right at your fingertips.

Made in Mainland China.

Model A: 4.5mm Stepper Motor — Specifications

• Outer Diameter: 4.5 mm
• Motor Height: 8.6 mm
• Shaft Diameter: 0.7 mm (flat position: 0.5 mm)
• Output Shaft Length: 1.5 mm
• Motor Type: 2-Phase, 4-Wire
• Driving Voltage: DC 5V (estimated)
• Internal Resistance: ~12.1 Ω
• 5V Short Circuit Current: 0.32A

Model B: 4.9mm Stepper Motor — Specifications

• Outer Diameter: 4.9 mm
• Motor Height: 6 mm
• Shaft Diameter: 0.7 mm (flat position: 0.5 mm)
• Output Shaft Length: 1.2 mm
• Motor Type: 2-Phase, 4-Wire
• Driving Voltage: DC 5V (estimated)
• Internal Resistance: ~14.8 Ω
• 5V Short Circuit Current: 0.27A
• Material: Metal

Key Features & Benefits

• ✅ Pack of 10 — great value for prototyping and bulk builds
• ✅ Dual-size option — choose 4.5mm or 4.9mm to suit your application
• ✅ Permanent magnet construction — stable holding torque even when unpowered
• ✅ Metal build — durable and precise for repeated use
• ✅ CE certified — meets standard safety requirements
• ✅ 5V DC operation — easy to power from common microcontroller platforms
• ✅ Ultra-compact — ideal for tight-space applications like camera lens autofocus mechanisms

What's in the Box?

• 10 × Mini 2-Phase 4-Wire Stepper Motor (your choice of 4.5mm or 4.9mm)

Important Notes

• A compatible 2-phase 4-wire stepper motor driver is required (not included) to operate these motors.
• Slight color variation from product images may occur due to monitor settings and lighting conditions.
• Minor dimensional tolerances apply due to manual measurement.

Great for Makers & Engineers

Whether you're building a custom camera lens focus system, a micro-robot arm, a precision slider, or experimenting with your maker mindset, these stepper motors give you the precise control you need. They pair well with popular DIY microcontroller platforms and motor driver boards.

For more technical guidance on stepper motor control in DIY and electronics projects, visit the National Institute of Standards and Technology (NIST) for standards and measurement resources relevant to precision engineering.

Looking for more components for your builds? Check out our DIY project inspiration or explore our full range of electronics and hobby components.

Frequently Asked Questions

Q: What driver do I need for these 2-phase 4-wire miniature stepper motors?

A: These stepper motors require a compatible 2-phase 4-wire stepper motor driver board. Common options used in DIY projects include DRV8825, A4988, or ULN2003-based drivers, depending on the current and voltage requirements of your specific setup. The driver is not included in this pack.

Q: What is the difference between the 4.5mm and 4.9mm stepper motor models?

A: The 4.5mm model (Model A) has a slightly taller profile (8.6mm height) and a shorter output shaft (1.5mm), with a lower internal resistance of ~12.1Ω. The 4.9mm model (Model B) is shorter in height (6mm) with a 1.2mm output shaft and a slightly higher internal resistance of ~14.8Ω. Both run on DC 5V and share the same shaft diameter of 0.7mm. Choose based on the physical space and torque requirements of your project.

Q: Are these stepper motors suitable for camera lens autofocus DIY builds?

A: Yes! These ultra-compact miniature stepper motors are specifically designed to fit within the tight tolerances of DIY camera lens actuator systems. Their small outer diameters (4.5mm or 4.9mm) and precise permanent magnet construction make them ideal for autofocus mechanisms, lens focus rings, and similar micro-positioning applications.

Q: How many motors are included in one order?

A: Each order includes a pack of 10 miniature stepper motors. This makes the set excellent value for prototyping, replacing worn components, or stocking up for multiple projects.