Reasons For Oil Leakage of Gear Planetary Reducer

- Feb 25, 2021-

Recently, some customers reported that the planetary gear reducer leaked oil. After double check we found that the incorrect model selection caused conflict between the orientation of the oil hole and the installation resulting in oil leakage. Regarding this issue, Gigager engineer remind you that the correct installation must be provided when selecting the model, or such a problem will occur. Next, let's analyze why the oil leakage occur in the gear planetary reducer.


The gears are working at high speed when the gear reducer under operation, and heat is generated when they are engaged with each other. If there is no oil hole, the box is in sealed state. According to the principle of thermal expansion and contraction, as the temperature gradually increases the internal pressure of the box increase too, which not only the temperature cannot be dissipated but also affects the oil seal, then oil seepage/leakage occurs.


Therefore, the gear planetary reducer should have oil holes for ventilation and heat dissipation. However, there is particular requirement to the orientation of the oil hole opening. For example, for horizontal device, the oil hole orientation should be at the top of the box; If the output axis install upwards, hole will be opened in the direction approaching the processing axis, which will be changed according to the device orientation changes. Thus the installation should be provided for model selection before purchase.


Gigager engineer reminds that if the installation is incorrect and the gear is sealed, it cannot be drilled from the head, because the debris will enter into the box and cause damage to the gear. For this circumstance, if the machine is not working for long time, let’s say 8 hours a day, user can lock the oil hole by bolts. Thus the lubricating oil in the box can be used for 5 to 8 years under this normal circumstances without replacement.