What is roller bearing?

What is roller bearing?

Roller bearings — also known as rolling-element bearings — are similar to ball bearings in that they are designed to carry a load while minimizing friction.
What is ball bearing?

What is ball bearing?

Ball bearings are comprised of four major parts: outer ring, inner ring, balls between the rings, and a cage to prevent the balls from hitting each other.
What are bearings?

What are bearings?

A bearing is a machine element that constrains relative motion to only the desired motion, and reduces friction between moving parts.