Frictional resistance considerably less than in plain bearings
Rotating – non-rotating pairs separated by balls or rollers
Ball or rollers has rolling contact and sliding friction is eliminated and replaced by much lower rolling friction.
In plain bearing the starting resistance is much larger than the running resistance due to absence of oil film.
In ball and rolling bearings the initial resistance to motion is only slightly more than their resistance to continuous running.
Hence ball and rolling bearing are more suitable to drives subject to frequent starting and stopping as they save power.
Owing to the low starting torque, a low power motor can be used for a line shaft running in ball bearing.
Ball and Roller bearing
The disadvantage of the ball and roller bearings are high cost, they cannot be used in half, and greater noise.
The ball and roller bearing consists of following parts:
APPLICATIONS OF ROLLER BEARINGS
Pollution
Pollution can get stuck in a greasing layer between a ring and elements of rotation of the bearing. It can lead to damage of bearings
Damage of a surface (jag),
caused by pollution
Bearing life at rated reliability
log(F)
log(L)
Proper Mounting
The danger of damaging raceways can be
minimized by the use of the specifically
designed BALTECH fitting tools
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