A “Ball Bearing” is a mechanical device which consists of number tiny hard balls running in grooves on the surfaces of two concentric metal rings, one of which is fitted on a rotating shaft. They provide smooth movement, lower coefficient of friction and bear axial load in rotary applications. The size of the ball bearings varies from, smaller than a grain of wheat (small enough to fit in a wrist watch) to nearly a meter in diameter for industrial and power plant turbines.
The General Classification of Ball Bearings Based on Load Handling Capabilities is:
1. Radial ball bearing – handles radial loads.
2. Thrust ball bearing – handles axial loads.
3. Angular contact ball bearing – handles axial and radial loads.
The Some of the Applications of Ball Bearings are:
1. In Automotive industries.
2. In Agricultural harvesting equipment’s.
3. In Industrial turbines, this has high quality bearings.
4. Wrist watches and wall clocks.
5. Used in Aircraft to design special Jet engines and in Railway engines.
The “Roller Bearing” is a type of mechanical bearing that uses ‘Cylindrical’ or ‘Barrel’ shaped rolling elements to support the separation between the rotating parts of the bearing. They can bear heavier loads than ball bearings because of the greater contact area between races and rollers, but cannot handle high-speed rotation. The roller bearings have linear contact at the rolling surfaces which slows the speed for larger load carrying capability.
The Different Types of Roller Bearings Generally used are:
1. Cylindrical Bearings.
2. Tapered Bearings.
3. Spherical Bearings.
4. Thrust Bearings.
5. Needle Bearings.
The Some of the Applications Of Roller Bearings are:
1. Used in Electric motors and power tools.
2. For Conveyor belts, machine tools and power generator.
3. It’s a choice of Railway wheels, trucks and mining equipment.
4. In Gear drive clutch release and machine tools.
5. Wrist watches, wall clocks and turbines.