What Is The Difference Between Needle Bearings And Ball Bearings?

Rolling bearings are generally composed of four parts: outer ring, inner ring, rolling element and cage, strictly speaking, it is composed of six parts: outer ring, inner ring, rolling element, cage, seal and lubricating oil.
To put it simply, as long as there is an outer ring, an inner ring, and a rolling element, it can be defined as a rolling bearing.
According to the shape of the rolling elements, rolling bearings are divided into two categories: ball bearings and roller bearings.
A bearing with a rolling element that is a needle roller is a needle roller bearing.
Bearings with ball rolling elements are either ball bearings or ball bearings.