Question 1

How long do roller bearings last?

Accepted Answer

The typical life of a wheel bearing is 136,000 to 160,000 kilometres (approximately 85,000 to 100,000 miles). This is merely a generalisation; the actual lifespan of a wheel bearing is dependent on the bearing's quality and the environment in which it operates.

Question 2

How do roller bearings fail?

Accepted Answer

The main cause of roller bearings not lasting as long as they should is lubricant contamination from particulates. A lubricant sample may appear clean to the unaided eye, but it really contains minute wear-causing impurities like grit, dust, sand, metal shards, and other materials.

Roller Bearings