What can damage bearing seals?

Excessive lubrication can damage bearing seals because when bearings are over-greased, it can cause a buildup of pressure within the seal. This excessive pressure may lead to the seal being pushed out of its proper position or even damaged physically. The lubricant can also become contaminated with dirt or grease degradation products more easily if there is too much, further compromising the integrity of the seal. Proper lubrication levels are essential because the right amount ensures effective lubrication and helps maintain the seal’s function without causing undue stress or damage.

In contrast, while dust accumulation, insufficient cleaning, and low temperatures can affect bearing performance and longevity, they do not directly compromise the bearing seals in the same manner that excessive lubrication can. Dust may create abrasive conditions or ingress but does not inherently damage seals, and low temperatures generally do not cause immediate physical damage to seals unless they reach levels that cause material brittleness.