Zhaowei Machinery & Electronics Co., Ltd.
Planetary Gearbox Manufacturer

Planetary Gearbox

A planetary gearbox is a commonly used reducer consisting of the planet gear, sun gear, and outer ring gear, whose structure has the functions of shunting, deceleration, and multi-tooth meshing to improve the output torque, better adaptability, and work efficiency. The sun gear is usually placed in the center, and the planet gears orbit around the sun gear, receiving torque from it. The outer ring gear (refers to the lower housing) meshes with the planet gears. ZHAOWEI provides optional motors, such as brushed DC motors, DC brushless motors, stepper motors, and coreless motors, which can be matched with micro planetary gearbox for better performance.

Modular Gearbox

small gearbox

Advantages of Planetary Gearbox

1. High torque: With more teeth in contact, the mechanism can transmit and withstand greater torque in a more uniform manner.
2. Durable and efficient: The bearing can reduce friction by connecting the shaft directly to the gearbox. It allows for better rolling and smooth running, simultaneously enhancing efficiency.
3. Impressive precision: The rotation angle is fixed, which improves the accuracy and stability of the rotation movement.
4. Compact size: The planetary gear motor can be compact and small due to the planetary structure, in which multiple gears mesh together and orbit around a sun gear.
5. Low-noise: The multiple gears enable more surface contact. Rolling is much softer, and jumps are virtually nonexistent.

Module Voltage
Reduction Ratio Rated Speed(rpm) Rated Torque
Overall Length
3.4mm DC Gear Motor 3V 5-625 customization 10.75-15.25mm
4.3mm DC Gear Motor 3V 6-1296 customization 11.78-16.32mm
6mm DC Gear Motor 3-12V 4.8-1707.9 4-1563rpm 23.7-30.9mm
8mm DC Gear Motor 3-12V 3.6-809.1 14-3361rpm 23.1-31.2mm
10mm DC Gear Motor 3 - 24V 3-809 17-3917rpm 24.7-34.0mm
12mm DC Gear Motor 3-24V 4-1296 6-1875rpm 24.5-35.9mm
16mm DC Gear Motor 3-24V 4-1296 6-1875rpm 38.4-48.3mm
20mm DC Gear Motor 3-24V 4-1296 6-1875rpm 42.7-58.6mm
22mm DC Gear Motor 3-24V 4-1296 6-1875rpm 57.5-79.4mm
24mm DC Gear Motor 3-24V 4-1296 6-1875rpm 49.3-69.45mm
28mm DC Gear Motor 3-24V 4-1296 5-1658rpm 58.1-83.6mm
32mm DC Gear Motor 3-24V 16-1078 7-469rpm 78.2-98.2mm
38mm DC Gear Motor 3-24V 4-1526 4-1525rpm 87.7-126.7mm

Customization Small Gearbox

ZHAOWEI offers customer-based planetary gearbox solutions with extended choice of materials and gearbox features. Planetary gearbox can be combined with motors, including DC motor, stepper motor, and corelsss motor, to achieve high output torque, smooth output speed, and high work efficiency.

Specifications are as follows: Diameter: 3.4mm–38mm; Voltage: under 24V; Output power: under 50W; Output speed: 5rpm–2000rpm; Speed ratio: 5–1500; Output torque: 1.0–

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Industrial Equipment Drive

Medical Equipment Drive

Consumer Electronics Drive

Tell Us About Your Application Requirements

ZHAOWEI team is glad to help you choose the right micro gear motor to optimize your application. Please fill out the form below with the necessary information and our representative will respond to you as soon as possible.

Customer Service

ZHAOWEI’s micro drive systems apply in diverse areas all around the world to deliver the power, precision, and efficiency to motion solutions. Our sales and engineering support teams are ready to assist you with any questions, including quotation, application support, and product configuration. Please submit your requirements through our Custom Service Form to ensure a faster response.