Micro Planetary Gear Motor 8mm High Precision- Suzhou Retek Electric Technology Co., Ltd.

8mm Micro Planetary Gear Motor: Sub-Miniature Force Actuation

The 8mm Micro Planetary Gear Motor integrates a miniature high-speed brushed DC motor (or coreless DC motor) with a planetary gearhead in an 8mm to 12mm diameter package.

This motor is engineered for tasks demanding substantial torque output in the most confined spaces. It achieves torque levels up to 1 Nm with multi-stage reduction, converting the high RPM of the micro motor into usable, slow-speed, precise force. The use of metal planetary gears (often brass or sintered steel) is critical for transmitting force in this diminutive size, making it a key component in micro-robotics and surgical tools.

Introduction

Detailed Parameters and Performance Data

RETEK: Precision for Medical and Optical Micro-Actuation

Suzhou Retek Electric Technology Co., Ltd. focuses on minimizing noise and backlash in our micro planetary series. We use specialized, low-viscosity synthetic grease and high-tolerance gearing to ensure smooth, repeatable motion, critical for medical dosing and focus mechanisms. This solution provides a reliable, high-density torque source in systems where every millimeter and milligram counts.

Applications

Advanced Technology Highlights

Micro-Actuation Applications for 8mm Gear Motors

Surgical Robots: Drives for endoscope movement, biopsy tools, and miniature grippers. Challenge: Size, sterilization, and smooth control.
Dosage Pumps: Motors for automated fluid dispensing in portable medical devices.
Automated Focus/Zoom Lenses: Actuators for miniature industrial or consumer cameras.
Smart Locks and Security: Drives for miniature locking mechanisms in smart home devices.

Technical Specifications

Industrial & Commercial Usage

Technical Parameters (8mm Micro Planetary)

Parameter	Range / Typical Value	Unit
Gearbox Diameter	8 to 12	mm
Max Output Torque	Up to 1.0	Nm
Reduction Ratio	10:1 to 1000:1	Ratio
Voltage	1.5 to 6	VDC
Output Backlash	Low-Tolerance Options Available	Feature

Additional Information

Supplementary Details & Notes

Production & Customization Services

Production focuses on automated micro-assembly and 100% visual inspection of gear teeth using advanced imaging systems.

Encoder Integration: Factory mounting of a miniature magnetic encoder to the motor rear for high-precision speed/position control.
Custom Output Interface: Providing output shafts with integrated lead screws, threads, or specialized coupling pins.
Reduced Backlash: Selective gear matching and lubrication processes to achieve output backlash as low as 1∘.
Voltage/Winding Tuning: Optimizing the motor winding for specific battery chemistries (e.g., 3.7V Li-ion).

Service & Support

Technical Advantages and Core Design Features

Ultra-Compact Design: Highest torque density available for its size class.
High Torque Multiplication: Multi-stage planetary reduction delivers massive force from a tiny motor.
Smooth Operation: Precision gears and low-friction bearings minimize acoustic noise and vibration.
Low Voltage Operation: Ideal for battery-powered, handheld, or wearable devices.
Custom Shaft Options: Available with pinions, screw threads, or specialized tips.

Frequently Asked Questions

Common Inquiries Regarding 8mm Gear Motors

Q: How does the life of these micro motors compare to larger ones?
A: They typically have a shorter life (e.g., 100 to 1000 hours) due to the small size of the commutator and brushes, especially when run at continuous maximum torque. Coreless versions offer longer motor life but require higher initial cost.

Q: Can these motors be sterilized?
A: Standard versions cannot. Custom versions with specialized magnet wire, stainless steel parts, and high-temperature lubricants are available for autoclave sterilization in medical applications.

Q: What is the benefit of the planetary gear type here?
A: Planetary gears are coaxial (input and output shafts are aligned), which is space-efficient, and they share the load across multiple points, providing higher torque capacity than comparable spur gears in the same diameter.

Resources

Advanced Material Selection Guide

Gears: Sintered brass or stainless steel (for corrosion resistance) for maximum torque and wear resistance.

Lubricant: Low-viscosity, non-migrating synthetic grease suitable for high-speed micro-gearing.

Housing: Stamped or machined stainless steel/brass tubing for structural integrity and tight tolerance control.

About Suzhou Retek Electric Technology Co., Ltd.

Unlike other motor suppliers, Retek engineering system prevents the selling of our motors and components by catalogue as every model is customized for our customers. The customers are assured that every component they receive from Retek is designed with their exact specifications in mind. Our total solutions are a combination of our innovation and a close working partnership with our customers and suppliers.

As China Micro Planetary Gear Motor 8mm High Precision Manufacturers and Wholesale Micro Planetary Gear Motor 8mm High Precision OEM/ODM Suppliers, Retek business consists of three platforms: Motors, Die-Casting and CNC manufacturing and wire harness. Retek products are widely supplied for residential fans, vents, boats, airplanes, medical facilities, laboratory facilities, trucks and other automotive machines.

Welcome to send us an RFQ, it is believed you will get the best cost-effective products and services here!

Customized Solutions

Quality Assurance

Global Export

Suzhou Retek Electric Technology Co., Ltd.

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