Designed specifically for medical optics, surgical instruments, micro-pumps, and smart locks, INEED’s 6mm planetary gear motors represent the pinnacle of micro-mechatronic engineering. By housing a multi-stage precision gear train inside a 6mm outer diameter housing, these ultra-micro gearmotors deliver impressive torque multiplication within an extremely slim envelope.
Choose between high-strength planetary metal gears or whisper-quiet plastic gear stages to optimize strength, noise, and power density for your micro actuation mechanisms.
Engineered Highlights:
Micro Diameter Envelope: Ultra-compact 6mm outer diameter for extreme spatial limits
Gear Material Choice: Metal planetary gears for max torque or plastic/hybrid for silent running
Reduction Ratios: Multi-stage gearing providing high reduction ratios down to low output RPM
Precision Tailoring: Custom output shaft lengths, D-flats, gear backlash control, and micro leads
| Item | Specification |
|---|---|
| Gearbox diameter | 6 mm |
| Gearbox type | Planetary (plastic composite / LCP) |
| Rated voltage (typical) | 3.0V DC |
| Operating voltage range (typical) | 2.1–3.6V DC |
| Gear ratios (stages) | 5.14:1 (1-stage), 26.45:1 (2-stage), 136.02:1 (3-stage), 699.55:1 (4-stage) |
| Output speed range | 40–6420 rpm (depending on motor & ratio) |
| Output torque range | 5–200 g·cm (depending on motor & ratio) |
| Max recommended instantaneous torque | ≤ 250 g·cm (plastic gearbox limit) |
| No-load current (typical) | Up to 60 mA (depends on configuration) |
| Shaft options | Standard D-shaft (2.0 mm), optional round shaft (1.5 mm) |
| Wiring / connector | Wire length & connectors customizable (e.g., JST) |
| Engineering support | Datasheet, 2D/3D drawings, performance curves available on request |
These tiny DC reduction motors consist of two parts. 6mm planetary gear motor contains a 6mm diameter coreless motor and a 6mm plastic gearhead. Their gears, output shaft, and entire reducer are made of liquid crystal polymers (LCPs), also known as plastic gear motors.
By combining these 4 different reduction boxes with 4 kinds of 6mm coreless motors, we can get 4 reduction motor series.
The solution has 16 options: Click the series images Right to view detailed specs, drawings and options.
Use this quick guide to select the right reduction ratio:
| Gear ratio | When to choose |
|---|---|
| 5.14:1 (1-stage) | Higher output speed, lower torque. Best for fast actuation with light loads. |
| 26.45:1 (2-stage) | Balanced speed and torque. A common starting point for prototypes. |
| 136.02:1 (3-stage) | Higher torque, lower speed. Better for locks, latches, and controlled motion. |
| 699.55:1 (4-stage) | Maximum torque and holding capability at very low speed. Best for high load or compact mechanisms. |
Low starting voltage requirement? For battery-driven products, we can optimize the starting voltage to
0.8–1.2V DC (based on your load and target performance).
Typically, these motors are rated at 3.0V DC and operate at 2.1V DC to 3.6V DC. If your application needs to operate at a low starting voltage, we can set the motor starting voltage range at 0.8-1.2V DC.
The lower voltages may not be used and higher voltages may negatively affect the life span of the 6mm gear motor. The output speed range of this series of gear motors is from 6420rpm to 40rpm, the output current is 60mA, and the torque is from 5g to 200g.cm.
When the planetary gear motor is under stalling or overload, it will damage the winding and brush of the motor in a few seconds.
For these nylon transmissions, the instantaneous torque cannot exceed the upper limit of 250g.cm, we strongly recommend keeping the application loads within this limit. The free running speed, stall torque, and stall current of the motor can reach its optimum operating condition when operating at 3.0V DC voltage.
The 6mm planetary gear motor ingeniously combines a 6mm neodymium rare-earth magnet coreless motor with a planetary gearbox. Weighing only 1.25 grams, these small gear motors offer exceptional versatility, fitting seamlessly into even the most confined spaces, including electronic locks, drones, and medical devices.
Our Nano Planetary Gearboxes feature multiple gears designed to evenly distribute loads, ensuring reliable performance under varying conditions.
Manufactured in large quantities, our 6mm motors boast superior precision. Crafted from injection-molded plastic, the Nano planetary gear motors uphold strict quality standards, guaranteeing consistent and accurate operation.
With their small size, high torque, and precise performance, these low speed high torque electric motors find applications across a wide range of industries. From medical instruments and miniature robots to consumer electronics and small appliances, the small planetary gear motors capabilities enable precise adjustments and movements, enhancing functionality in various settings.
To speed up your design validation and integration, we can provide:
Request files: Upload your 2D/3D CAD or share your target torque, speed, voltage, and available space.
Our sales engineers will reply within 8 hours.
Partnering with a reliable mini DC gear motor manufacturer is critical to the success of your high-precision products. At INEED Motors, we bridge the gap between complex engineering requirements and high-volume manufacturing with uncompromised quality standards.
We can supply you with a round plastic shaft with diameter of 1.5mm and length of 8.05mm.
The length of the wire can be customized, or various connectors can be added at the end of the wire.
While our standard 6mm planetary gear motor comes pre-configured for versatility, we understand that off-the-shelf solutions rarely fit custom precision electronics seamlessly. At INEED Motors, our engineering team provides end-to-end OEM/ODM customization to meet your exact mechanical, electrical, and performance specs.
We adhere to rigorous ISO 9001 certified manufacturing processes to ensure strict quality limits:
Streamline your product development cycle with fast sample turnarounds and flexible, high-volume manufacturing.
This series of 6mm plastic planetary gear motors has four speed ratios: 5.14:1, 26.45:1, 136.02:1, and 699.02:1, indicating that they have four gear stages.
The planetary gearbox design of 6mm gear motors allows for multiple gears to distribute the load evenly, resulting in higher torque output compared to standard motors of similar size.
Backlash depends on the gear ratio, manufacturing tolerance, and load condition. For miniature 6mm planetary gearboxes, backlash is typically higher than precision metal gearboxes due to the small module and plastic composite materials. If your application is sensitive to positioning error, please share your allowable backlash range and working load—our engineers can recommend the best series/ratio and matching output shaft structure.
Lifetime is mainly affected by working voltage, duty cycle, load/torque, and stall events. To maximize lifetime, avoid overload and stalling, keep the load within the recommended torque limit, and operate within the specified voltage range. If you provide your duty cycle and load profile, we can suggest a configuration and provide reliability guidance for your target lifetime.
Noise is influenced by gearbox stages (ratio), rotational speed, mounting rigidity, and load. To reduce noise, you can:
Its gearbox cannot be made of metal because of structural limitations. If you are looking for a 6mm metal gearbox motor, consider our 6 mm metal planetary gear motor. This series of metal planetary gear motors have stronger structural components that can handle higher torques and offer a variety of gear ratios. For more information, please contact our sales engineer immediately!
Yes, INEED Motors is a professional gear motor manufacturer that offers customization options for 6mm planetary gear motors, allowing customers to tailor the motor’s specifications, such as torque, speed, and voltage, to meet their specific requirements.
For this 6mm plastic planetary gearbox series, the gearhead is made from high‑performance plastic composite (LCP). A full metal 6mm planetary gearbox has structural limitations in this size range. If your project requires higher torque capability, stronger impact resistance, or different material requirements, please contact us—our team can recommend alternative solutions based on your constraints.
Stalling or overload can damage the winding and brushes within seconds. We recommend:
To recommend the best series and ratio quickly, please share:
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