WeiGao Transmission
Email: sales@wgt.net.cn
Home / News / News / What is a planetary gear reducer

What is a planetary gear reducer

Views: 2     Author: WGT     Publish Time: 2022-04-12      Origin: Site

What is a planetary gear reducer

Planetary gear reducer is also known as planetary reducer and servo reducer. In the reducer family, planetary reducer with its small size, high transmission efficiency, wide deceleration range, high precision, widely used in servo motor, stepper motor, DC motor and other transmission systems. Its function is to reduce the speed, increase the torque and reduce the load/motor rotational inertia ratio under the premise of ensuring accurate transmission.

The main transmission structure of planetary gear reducer is: planetary gear, sun gear, gear ring, planetary frame.

Due to structural reasons, the minimum single-stage deceleration of the planetary reducer is 2.8, and the size generally does not exceed 12.5. The common reduction ratio is 3/4/5/6/8/10, and the number of reduction gear generally does not exceed 3, but some large reduction ratio has four levels of customized reduction gear. Compared with other gear reducer, planetary gear reducer has the characteristics of high rigidity, high precision (less than 1 point for a single stage), high transmission efficiency (97-98% for a single stage), high torque/volume ratio, lifetime maintenance free, etc. Because of these characteristics, planetary decelerators are mostly mounted on stepper motors and servo motors to reduce speed, increase torque, and match inertia. The rated input speed of the planetary reducer can be up to 18000 RPM (related to the size of the reducer itself, the larger the reducer, the smaller the rated input speed), and its operating temperature is generally around -25℃ to 100℃. Its operating temperature can be changed by replacing grease.

Because precision planetary reducers are equipped with servomotors, the back clearance class (arc minutes) is very important and the price of the different back clearance classes varies considerably. The planetary reducer can be used as a multi-gear box with a reduction ratio of 100,000.

Operation parameters

The circumferential speed of gear transmission shall not exceed 10m/s..

Input shaft speed is not higher than 1500 RPM.

The operating temperature of the reducer is -40℃-+45℃.

Reducer can be used for forward and reverse operation.


  • Where is your product mainly exported?

    Our products are mainly exported to Japan, the United States, Germany, Southeast Asia and other countries and regions. Our customers include many OEM customers specializing in construction machinery. We have partnered with several of the Fortune 500 companies to become one of their major foundry suppliers in China.
  • How to provide goods?

    Usually we will ship the goods to the sea. The factory is only 460 kilometers away from the port. It is very convenient and convenient to transport the goods to any other country. Of course, if your cargo is very urgent, Ningbo Airport and Shanghai Airport are also nearby.
  • What is the payment term?

    When we provide you with a quotation, we will negotiate with you: EXW, FCA, FOB, CIF, CRF, DAP Etc. For mass production, you need to pay 30% of the deposit before production and 70% of the balance before shipment. Our most common way is T/T.
  • How to ensure the quality of your products?

    First, we will check after each process. For finished products, according to customer requirements and international standards.
  • How many employees does your company have? What is the relationship between technicians?

    We now have more than 180 employees, including 36 engineers and 28 QCs.
  • What is the ability of your company?

    We have a number of production lines with a monthly production capacity of 1,600 units and an annual production capacity of 20,000 units.

WeiGao Transmission

WeiGao REDUCER is a high-tech enterprise integrating scientific research, development, manufacturing, sales and service. 

+86 400 801 9158

Email: sales@wgt.net.cn   wgt.net.cn@gmail.com
Tel:+86571 85023000        Fax: +86571 85023658