When it comes to micro DC motors, size is more than just a measurement – it determines performance, durability, and compatibility with your device. Whether you are building a robot vacuum, a massage gun, or a smart lock, selecting the correct motor size is critical for achieving optimal torque, speed, and energy efficiency.
At Lihua Motor, with over 20 years of experience as a custom micro DC motor manufacturer, we understand how important it is to match the right motor dimensions to your product design. In this guide, we’ll cover common micro motor sizes, their impact on performance, and how we can provide OEM/ODM motor solutions for your projects.
Most micro DC motors range from 5.4mm to 45mm in diameter. These variations allow designers to choose the perfect size based on application and space limitations.
5.4mm – 8mm: These ultra-small mini DC motors are commonly used in smart locks, portable beauty devices, and micro pumps where compact size and low noise are essential.
10mm – 24mm: A versatile range suitable for massage devices, medical instruments, and small robotics. For example, a 12V micro DC motor (20mm) offers a good balance of torque and speed.
25mm – 45mm: Larger high torque DC motors are often found in treadmills, vacuum robots, and automation equipment, where more power is needed for heavier loads.
Tip: Always consider the available installation space and required torque before deciding on the motor size.
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| 8mm diameter K10 Mini Motor for PC | 24mm RF-300CA motor for DIY Science Toys | 27.7mm RS-360/365 Motor for tools | 12v 24v 42mm RS-775SM motor for drill |
Motor size directly impacts three key performance parameters:
Torque – Larger motors can handle higher loads, making them ideal for robotic arms or industrial automation.
RPM (Speed) – Smaller motors generally run faster but offer less torque, perfect for lightweight and high-speed applications like beauty devices.
Power Output – At Lihua Motor, we offer micro DC motors with 1V-36V voltage range and 0.05W to 100W output power, allowing customization based on your product’s performance requirements.
For example:
A small DC motor 10mm is ideal for low-torque, high-speed tasks.
A 24V DC gear motor 30mm provides high torque, making it perfect for massage equipment and household robotics.
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| FC-280 11440 Motor TN Curve |
Smart Home: 5.4mm to 10mm motors for smart locks and electric curtains.
Personal Care: 12mm to 20mm motors for massage guns, beauty devices, and hair clippers.
Medical Devices: Compact coreless DC motors for pumps and portable diagnostic instruments.
Robotics: High torque gear motors (25mm – 45mm) for robotic arms, vacuum cleaners, and automated systems.
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| Smart Home | Personal Care | Medical Devices | Robotics |
Choosing the right size is only part of the challenge – finding a reliable micro DC motor supplier that can provide customized solutions is equally important. At Lihua Motor, we offer:
✔ Full Size Range: Diameter from 5.4mm to 45mm.
✔ Voltage Options: 1V to 36V for various applications.
✔ Custom Features: Gearbox integration, encoder options, waterproofing, and low-noise design.
✔ Certified Quality: ISO9001, IATF16949, ROHS, REACH, SGS, and UL certifications.
✔ High Production Capacity: 400 employees, automated assembly lines, and 40 million units annual capacity.
Whether you need a brushless DC motor for robotics or a low-noise mini DC motor for beauty devices, we deliver tailored solutions that meet your exact specifications.
Q1: What is the smallest micro DC motor size you offer?
We manufacture motors as small as 5.4mm in diameter, ideal for compact and portable devices.
Q2: Can I customize a 24V DC motor with a specific diameter?
Yes! We provide OEM micro DC motor customization, including voltage, torque, RPM, and size.
Q3: Which motor size is best for massage equipment?
For massage guns and cushions, we typically recommend 24.4mm to 42mm high torque DC motors with optimized speed and noise levels.
Looking for a custom micro DC motor manufacturer with proven quality and on-time delivery? Lihua Motor has served global brands for over 20 years, delivering 20,000+ custom motor solutions.
Contact us today for free consultation and samples.
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