The common mistake
When a bearing runs hot, adding more grease may feel like the safe response. In reality, excessive grease can increase churning and operating temperature.
Why it becomes damaging
Higher temperature accelerates grease oxidation and can damage seals, while excessive fill can prevent the grease from distributing correctly.
Better practice
Use the correct grease quantity and relubrication interval for bearing size, speed, housing and operating condition. Investigate the root cause of a hot bearing before adding grease.
This article is general technical information and is not a substitute for the equipment OEM manual, lubricant manufacturer recommendation or site-specific engineering review.