Will over-lubrication of ball bearings cause the absorption of contaminants?

Excessive lubrication of ball bearings may indeed cause the adsorption of pollutants.
Excessive lubrication will increase the amount of grease inside the bearing, thereby increasing the possibility of adsorbing and attracting external pollutants. These pollutants may enter the interior of the bearing and cause particle accumulation and corrosion, further exacerbating bearing wear and damage. Specifically, excessive lubricating grease can form a thick lubricating film inside the bearing, which not only increases friction but may also cause grease leakage to the outside of the bearing or surrounding machine components, polluting the environment and even affecting the normal operation of other components.
In addition, excessive lubricating grease may also cause excessive stress on the sealing area of the bearing, increasing the risk of oil seal wear and damage, cause to grease leakage or contamination. Meanwhile, excessive lubricating grease will increase the internal friction of the bearing, cause to increased energy loss and affecting the operational efficiency and energy consumption of the equipment.