An anti-friction bearing, also known as a rolling contact bearing, is justified over a journal or fluid film bearing when very little friction is needed for low differential surface speeds.
Anti-friction bearings can be categorized to two different configurations: axial ball and roller bearings.
axial ball Bearings:-
Axial deep groove ball bearings comprise shaft locating washers,
housing locating washers and ball and cage assemblies. The bearings are
not self-retaining; the ball and cage assembly and bearing washers can
therefore be fitted independently of each other.
In addition to series with flat washers, there are also series with
spherical housing locating washers for compensation of static
misalignment. These designs are normally used in com-junction with
support washers. Axial deep groove ball bearings are available in single
and double direction designs.
Miniature axial ball bearings are available in two designs: with and without raceways on the shaft and housing locating washers.
Both designs can support high axial forces but must not be subjected to radial loads.
Roller Bearings:-
cylindrical, tapered, spherical, thrust and needle roller bearings for use a wide range of applications.
cylindrical bearings are designed to manage heavy radial loads through
expertly designed critical dimensions such as roller and raceway
diameter and contact geometry. Available in one-, two-, four-row and
full complement configurations.
Spherical roller bearings are ideal for heavy loads and tough operating environments.
Thrust bearings manage thrust loads and provide high-shock-load resistance in a variety of applications.