1.2—Rolling Elements

Rolling elements refer to the components sandwiched between the bearing rings in rolling bearings.
As the type of rolling element used significantly influences a bearing’s characteristics, most bearing names include the name of the rolling element.
Here, we’ll introduce some common types of ball and roller bearings.

Type

Ball Bearings

Roller Bearings

Rolling
Element

Balls

Cylindrical rollers

Needle rollers

Spherical rollers

Tapered rollers

2D cross-section of an open single-row deep groove ball bearing.

(Deep groove) 
Ball bearing

2D cross-section of single-row cylindrical roller bearing.

Cylindrical roller bearing

2D cross-section of needle roller bearing.

Needle roller bearing
(Needle bearing)

2D cross-section of spherical roller bearing with cylindrical bore.

Spherical roller bearing
(Self-aligning roller bearing)

2D cross-section of tapered roller bearing.

Tapered roller bearing
(Tapered bearing)