How to choose a suitable planetary reducer?











How to choose a suitable planetary reducer?




Planetary reducer is a product that amplifies torque and reduces speed. When used in conjunction with a motor, it can provide a high-precision and powerful control module. Therefore, it is necessary to select suitable products according to the torque and accuracy level.


• The frame number is determined according to the torque.

The power source will have the effect of torque amplification after the reduction ratio. The output torque value of the reducer is proportional to the reduction ratio. When the ratio is larger, the torque value will be higher; but the gear set of the reducer has its limit, Therefore, the "rated output torque" indicated in the technical data of the product means that the product operates under this data and the product can work stably, so the frame number must be selected from the torque requirement.


• Model according to accuracy.

Positioning will be required in the automation process. When the positioning accuracy requirements are higher, higher-end products need to be selected, and vice versa. Accuracy of planetary reducer Planetary reducers are often used in the field of precision motion control to meet the application requirements of high torque, high torsional rigidity and low backlash. Selecting the appropriate reduction ratio can provide greater torque, so as to run at the best speed to achieve the best effect, reducing the moment of inertia of the load can increase the stability of the equipment, and by using the planetary reducer, the machine manufacturer can choose more Small and more economical motion control modules make the application range of planetary reducers cover the entire automation field. The products can be seen in the following industries: Planetary reducer is a product that amplifies torque and reduces speed. When used in conjunction with a motor, it can provide a high-precision and powerful control module. Therefore, it is necessary to select suitable products according to the torque and accuracy level. 11 It is called "backlash", which refers to the backlash of the gear set, which is defined as the angle value at which the output shaft of the reducer can rotate when the input end is fixed.


• Choose according to appearance.

According to customer needs, there are standard series of output shaft and connecting surface for customers to choose, and can also be developed according to customer's special needs.


• Based On motor Power and Torque

Below is a Motor watt and corresponding frame sizes, also before finalising frame size also check torque is within the nominal mentioned torque in specification chart/catalogue
To calculate output torque
Output Torque = Input Motor Rated Torque X Ratio

• For Planetary Gearbox
  • Frame - Power (Approx Range)
  • 42 - 50-100 Watt
  • 60 - 200-500 Watt
  • 90 - 500- 1000 Watt
  • 120 - 1000-2000 Watt
  • 150 - 2000- or More Watt
  • 180 - 7 KWatt or More
  • 220 - 11 kW or More

• For Right Angle Gearbox
  • SS42 - 100-200 Watt
  • SS70 -400 W and for low ratio up to 1:10 750Watt
  • SS90 -450-750 W and low 1.5 Kw
  • SS120 -750W- and for low ratio 2kw
  • SS150 -1kw- and for low ratio 3 kw
  • SS180 -2kw and for low ratio 5 kw

• The life of the reducer selected.

According to the shaft radial force is affected by the internal bearing. The bearing life can be estimated by the load and speed. When the radial load of the reducer is high, the bearing life will be shortened. At this time, it is recommended to use Great product.


• Applications of Planetary Reducer.

Planetary reducers are often used in the field of precision motion control to meet the application requirements of high torque, high torsional rigidity and low backlash. Selecting the appropriate reduction ratio can provide greater torque, so as to run at the best speed to achieve the best effect, reducing the moment of inertia of the load can increase the stability of the equipment, and by using the planetary reducer, the machine manufacturer can choose more Small and more economical motion control modules make the application range of planetary reducers cover the entire automation field. The products can be seen in the following industries:

  • 1. Pick and place systems.
  • 2. Positioning platform.
  • 3. Industrial conveyor System.
  • 4. Gantry type loading and unloading robot arm.
  • 5. Feeder.
  • 6. Rotary drive.
  • 7. CNC Engraving Machine.
  • 8. Industrial printing presses.
  • 9. Machine Tool (Automation Peripheral).
  • 10. Plasma cutting machine.
  • 11. Material Handling System.
  • 12. Optical Inspection equipment.
  • 13. Automatic Testing Machine.




planetary gearbox selection