How to select the frame size based on the working torque of the WB series micro cycloidal reducer

When choosing the machine base number for the WB series micro cycloidal reducer, the core criterion is the matching of the working torque and the rated torque of the reducer. You need to ensure that the rated output torque of the selected gearbox is greater than or equal to the maximum working torque under actual operating conditions, and leave a certain safety margin.

The specific steps are as follows:

1. Determine the actual working torque

Firstly, calculate or measure the maximum output torque required at the load end (unit: N · m), which depends on your equipment type, transmission mode, and operating conditions.

2. Reference rated torque range

According to and, the torque range of WB series micro cycloidal reducer is 25N · m~250N · m, and different machine base sizes correspond to different load capacities. For example:

Small models such as WB65 and WB85 are suitable for low torque scenarios (usually ≤ 100N · m)

Medium to large models such as WB120 and WB150 can carry higher torque (up to 250N · m)

3. Verify the safety factor

Suggest selecting a safety factor based on operating conditions:

General operating conditions: actual working torque ≤ rated torque × 0.8

Heavy load or frequent start stop conditions: actual working torque ≤ rated torque × 0.6

Refer to the torque verification principle in the reference to avoid early failure caused by overload.

4. Combining reduction ratio and installation form

The reduction ratio range supported by different machine base numbers may vary slightly (single-stage 9-87, two-stage 121-1849), and it is necessary to confirm whether the installation method (horizontal/vertical/dual axis type) matches the on-site requirements.

5. Final selection suggestion

If your working torque is within 50N · m, prioritize WB65 or WB85; If it is above 150N · m, WB120 or WB150 should be selected; When approaching 250N · m, choose the largest model and it is recommended to review the heat dissipation and lifespan.