Types of Bearing | Rolling contact bearing

In this blog, we will discuss the basic concepts related to bearing, types of bearings: Radial bearing, thrust bearing, sliding contact bearing, and rolling contact bearing. Also, we will discuss the types of rolling contact bearing which include deep groove ball bearing, angular contact ball bearing, self-aligning ball bearing, thrust ball bearing, cylindrical roller bearing, tapered roller bearing, and spherical roller bearing.

What is Bearings?

Bearing is a mechanical element that permits relative motion between two parts, such as shaft and housing, with minimum friction. Or in simple language, we can say that bearings are machine elements that support a moving element (axle or shaft) with minimum friction.

Function of Bearing

• The bearing ensures free rotation of the shaft or the axle with minimum friction.
• The bearing supports the shaft or the axle and holds it in the correct position.
• The bearing takes up the forces that act on the shaft or the axle and transmits them to the frame or the foundation.
• Axial Load: Axial load acts along the length.
• Radial Load: Radial load acts perpendicular to the length.

Types of Bearing

Bearings can be classified in different ways. Depending upon the direction of force that acts on them, bearings are classified into two types — Radial bearings and thrust bearings. A Radial Bearing supports the load which is perpendicular to the axis of the shaft. A thrust bearing supports the load, which acts along the axis of the shaft.

We can classify bearings depending upon the type of friction, bearings are classified in two categories- Sliding Contact bearings and Rolling Contact bearings. Sliding Contact bearings are also known as Plain bearings, journal bearings, or sleeve bearings. The Relative motion between the shaft and the support is sliding motion in the case of sliding contact bearings.

Due to sliding friction, wear and heat generation is very high, hence lubrication is required. Sliding contact bearings are used in crankshaft bearings in petrol and diesel engines, centrifugal pumps, large size electric motors, steam and gas turbines and concrete mixers, rope conveyors and marine installations.

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