A bearing is a mechanical component that reduces friction between moving parts and supports rotational or linear motion. It helps machines run smoothly and efficiently while minimizing wear and tear.

Bearings come in various types, including ball bearings, roller bearings, thrust bearings, tapered bearings, and needle bearings. Each type is designed for specific load capacities and movement requirements.

Choosing the right bearing depends on factors like load capacity, speed, operating environment, and alignment. Consulting a specialist or referring to manufacturer specifications ensures the best choice.

Bearings can fail due to lack of lubrication, excessive load, contamination, misalignment, or prolonged wear. Regular maintenance and proper lubrication can extend their lifespan.