Thrust Ball Bearings
Thrust
Ball Bearings carry pure thrust (axial) loads. When a load is properly
applied to this bearing, the internal contact points are aligned on a plane
parallel to the shaft. Radial loads dislodge the balls from their track.
Thrust ball bearings can be single direction and double direction designs.
Single Direction Thrust Ball Bearings
These bearings consist of one row of balls, which rotate, between a housing
washer and a shaft washer. They are separable type and can be mounted
separately. Single direction thrust ball bearings, can accommodate axial
loads in one direction and locate a shaft axially in one direction. They are
not suitable to any radial load.
Double Direction Thrust Ball Bearings
These bearings consist of two separate rows of balls which rotate between a
center shaft washer and two housing washers. This bearing should be used
when a thrust load is applied from two directions. They are separable type
and can be mounted separately on the shaft. They can axially locate a shaft
in both directions and should not be subject to radial loads.
The thrust ball bearings have flat housing washers. They do not allow any
misalignment between the shaft and the housing or angle between their
support surfaces. They are manufactured to normal tolerance as standard.
They are available in pressed steel and machined brass or steel cage. For
satisfactory operations, they should be subject to a minimum load. If the
thrust bearings work at high speeds or changes in the direction of the
loads, the inertia and friction may affect the rolling. The requisite
minimum axial load to be applied to thrust ball bearings can be estimated
using
Formulas for equivalent dynamic load and static load are
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