Radial load acts as a direct load on the output shaft and its bearings, and therefore affects its lifespan.
There are two possible countermeasures when the radial load is large:
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How to design a mechanism so that radial loads are not directly applied to the gear output shaft.
One example of a mechanism that does not apply radial loads is one that uses external bearings to support them.
In this way, radial loads caused by belt tension and loads will not act directly on the gearhead.
This will eliminate problems caused by radial loads, such as short-term damage to the output shaft bearings, fatigue damage due to bending of the output shaft or repeated loads.
However, care must be taken when increasing the number of bearings and supporting at three points, as there is a possibility that radial loads will be applied with the intermediate bearing as a fulcrum.
When assembling the gearhead output shaft and the pulley rotating shaft, be sure to use a flexible coupling to eliminate eccentricity and angular misalignment.
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How to select a gear with a larger allowable radial load when using direct coupling When direct coupling is necessary due to mounting space or other constraints, priority should be given to selecting a gear with a larger allowable radial load.
Guidelines for selecting a gear with a larger allowable radial load are as follows:- Select a gear with a large mounting angle
- Select gears with a large allowable torque
(our products tend to have gears with a large allowable torque that also have a large allowable radial load). - Select a planetary gear or harmonic gear
(planetary gears and harmonic gears can use larger bearings due to their structure, so they have higher allowable radial loads)
If you are directly mounting the pulley, make sure to mount it close to the base of the gear shaft.