BASIC MECHANICAL POWER TRANSMISSION DEVICESTypes of Bearings
Thrust Ball Bearings:-
Thrust bearings are available mainly in two types, such as single and double thrust. A single thrust bearing
consists of two rings and a set of balls in a retainer.
Double thrust bearings consist of one rotating ring in the middle with two ball
tracks, two sets of balls in a retainer and two stationary rings.
Tracks of balls are ground in such a way that the forces between the balls and
tracks are parallel to the axis of the shaft. Single thrust bearings are
designed for carrying load in one direction only whereas double thrust can take
in both directions. But these bearings can never carry any radial loads. On
account of the centrifugal forces on the balls, these bearings have a
limitation in the speed of outer operation.
Spherical Roller Thrust Bearings:-
This type of bearing is characterized by its high axial load
carrying capacity. It can also absorb considerable radial loads because the
direction of contact is inclined to the axis of the shaft. The track of the
housing washer is spherical, and the rolling bodies are barrel shaped. This
makes the bearing self-aligning and therefore insensitive to misalignment.