How Many Types of Bearing and Their Application,Parts

Hello friends in this topic, we will discuss about some basic knowledge of Bearing and also know how many types of bearing.

Bearing plays a very most important role in any machinery, moving parts, etc.

Without bearing, we are not capable of running any machine like lathe machine, drilling machine, pump, motor, etc.

Bearing is generally made from high carbon chromium steel metal and also heat treated that’s why these are hard and tough

The main principle of bearing is reducing friction between two moving part and also it is capable to exist load.

On how many types of bearing? Bearings are of only two types, friction and antifriction bearings and further subdivided these two like solid bearing ,ball bearing,rolller bearing etc.
This is just an overview we know further in detail.

Bearing Definition

The bearing is an element in which impel the relative motion and reduces friction between moving shaft or part of the machine to achieve a constant speed.

Or

Devices that support the rotating parts of a machine are called bearing.

For example, to prevent deviations in the shaft of the machine while rotating, a bearing is used.

How many types of Bearing?

Several types of bearings are used according to the requirement of a given system.

Many types of bearings are used according to design, load and size.

But mostly we can categorise two types of bearing.

  • Friction Bearing
  • Antifriction Bearing

Friction Bearing

These bearing are hollow round shape of cast iron, bronze, brass, bakery and white metal.

In such a bearing, Lubricant is used to reduced friction.

These bearing are used for slow running and heavy load on the shaft.

In these types of bearing there is no any rolling elements are used.

This type of bearing also known as plain bearing, sliding bearing as well as slide bearing.

Types of Friction Bearing

Friction bearing can further classify into six categories.
  • Solid Bearing
  • Bush Bearing
  • Self-Aligning Bush Bearing
  • Pedestal Bearing
  • Foot Bearing
  • Collar Bearing
  • Fluid Bearing 

Solid Bearing

They are made of cast iron or bronze bush and fit into fabricated or cast iron houses.

Bush bearing is used for small and light shafts and operating at low speeds.

Solid bearing’s bore is weakened during continuous running on the shaft, and there comes a time that the whole bearing has to be replaced.

To avoid this, the bore diameter of the bearing is increased and fitted to the bush inside it, and after the bush is damaged, it is easily changed.
And there is no need to change the entire bearing.

That’s why these bearing sometimes also called as bush bearing.

Bush Bearing

These bearings are made of brass or cast iron in round shape.

To prevent it from moving, a screw is fixed at one end and this screw is fixed half in the bush and half in the block.

These bearing are used for the high-speed requirement and where there is a possibility of corroding some parts.

Clearly see in figure solid bearing and bush bearing

types of bearing
Solid and Bush Bearing

Self-Aligning Bush Bearing

This type of bearing is used where shaft is found to be long and a little of alignment is missing. 

Pedestal Bearing

These bearings are used for long shafts, especially those requiring intermediate support, especially when the shaft bearing cannot be face mounted.

It consists of a stand or base, a cover and a sleeve that is divided into two parts called a bearing brass.

Foot Bearing

These bearings are used to support the shaft in a steady state where the bearings are in parallel to the axis of the shaft and one edge of the shaft is inside the bearing.

Collar Bearing

A bearing that prevents the axial force of a collar on a rotating shaft.

Fluid Bearing 

Fluid bearings are those bearing in which for lubrication fluid is used like liquid or gas.

Types of Fluid Bearing

Fluid bearing can be divided into two parts. 
  • Hydrodynamic Bearing 
  • Hydrostatic Bearing

See in figure types of fluid bearing

how many types of bearing
Types of Fluid Bearing

Hydrodynamic Bearing

Hydrodynamic bearing is a bearing system that uses liquids such as oil, water at atmospheric pressure and there is no any type of external pressure applied.

These types of bearings not concentric with journals or shaft and found some eccentricity.

Hydrodynamic bearings always operated at high speed and mostly used in Engine, Steam and hydraulic turbine.

Hydrostatic Bearing

Hydrostatic bearing is a bearing system that uses a pressurized liquid such as oil, water through external pump.

These types of bearings always concentric with journals or shaft and no eccentricity are present.

They are highly accurate, almost wear-free and operated at low speed also.

Especially used in high-precision application in machine tool measuring, testing and engineering.

Antifriction Bearing

The main purpose of these bearing is to use specific shape to reduce friction in the bearing.

These bearings also known as Rolling element bearing, rolling bearing as well as Rolling contact bearing.

In these types of bearing, rolling elements are used thus reduces the friction.

Such effects have a long lifespan and also load is carried out through rolling elements which is fitted inside of the bearing.

Types of Antifriction Bearing

There are two types of antifriction or rolling element bearing which is given below.
  • Ball Bearing
  • Roller Bearing

Ball Bearing

A ball bearing is a type of bearing element in which uses a ball and that ball is fitted between races of a bearing and moving inside that means in ball bearings uses ball as a rolling element.

Because of using ball as a rolling element so here found a point contact in between ball and races.

We use the ball bearing to reduce friction between moving parts and to exist radial and axial load. 

Types of Ball Bearing

Ball bearing can further classify into following parts.
  •  Single Row Ball Bearing
  •  Double Row Ball Bearing
  •  Angular Contact Ball Bearing
  • Thrust Ball Bearing
  • Self-Aligning Ball Bearing
  • Deep Groove Ball Bearing 
  • Filling Notch Ball Baring

See in figure, some types of ball bearing and that explanation is given below.

how many types of bearing
Types of Ball Bearing

Single Row Ball Bearing 

In this type of bearing ball arranged in a single row manner.

This type of bearing mostly used for high speed and to bear radial load.

These are used in small pumps and motor.

Double Row Ball Bearing

In this type of bearing ball arranged in a two rows with specific manner.

This type of bearing radial load existing capacity more than single row ball bearing.

Angular Contact Ball Bearing

This type of bearing is designed in such a manner to bear angular and as well as axial loads.

These types of bearing mostly used for high radial and axial load.

Generally point contact angle in ball bearing is at 90° but in case of angular contact bearing it is at a some angle instead of 90°.

Thrust Ball Bearing

This type of ball bearing is used for bear horizontal and vertical thrust load.

Self-Aligning Ball Bearing

These types of bearing is used to withstand journal load and where a little of alignment is missing. 

Deep Groove Ball Bearing

In this type of bearing balls are inserted in a groove which is made in between inner and outer race.

These types of bearing existing load capacity is high as compare to others type of ball bearing.

Filling Notch Ball Bearing

These bearing is almost similar to deep groove ball bearing but only difference is here notch are made in outer and inner race.

These types of bearing existing load capacity is high as compare to deep groove ball bearing.

Roller Bearing

Bearings, which is the rolling contact between surfaces operating based on rolling friction.

In these types of bearing using roller as a rolling element so here found line contact in between races.

That’s why these types of bearings existing load capacity is more than ball bearings.

Roller bearings are available with grooved races in the outer and inner members as like ball bearings.

Roller bearings are capable of carrying magazine (radial) loads, and It can work with higher loads than ball bearings.

To use this bearing, it is necessary to close the race.

Types of Roller Bearings

Roller bearing can further sub divided into following types.
  • Self-Aligning Roller Bearing
  • Cylindrical Roller Bearing
  • Gear Bearing
  • Spherical Roller Bearing
  • Needle Roller Bearing
  • Tapper Roller Bearing 

See in figure some of roller bearing types

how many types of bearing
Types of Roller Bearing

Self-Aligning Roller Bearing

This type of bearing is used where a little of alignment is missing. 

Also this type of bearing is used where high rpm and high radial load required.

Cylindrical Roller Bearing

In this type of bearing, cylinder type rolling element is used which diameter is greater than its length.

This type of bearing found in single, double and multiple row.

These types of bearing mostly used in heavy rotor and pumps.

Gear Bearing

In this type of roller bearing elliptical gear has arranged as a rolling element in which present smaller satellite gears which revolute around the center of bearing.

This type of bearing improves efficiency and also reduces sliding friction.

Spherical Roller Bearing

These bearings are self-aligning and both races are grinded to this effect.

These bearings found in double row series.

These types of bearings existing radial and axial load capacity is high and used for high speed.

These types of bearing working as self align bearing and mostly used in conveyor and gear boxes.

Needle Roller Bearing

In this type of bearing needle is used as a rolling element which is long in distance and increase surface contact thus needle roller bearing to existing radial load capacity is high.

These types of bearing used in automobile industry and compressor where reciprocating motion performed.

Tapper Roller Bearing 

These types of bearing is used to bear radial and axial load.

These types of bearing’s inner race, outer race and rollers is in tapper shape.

These types of bearing mostly used for gear boxes and agricultures machinery.

Some special types of Bearing


Jewel Bearing

In these types of bearing axial is loaded by rolling a slight off-centre

This type of bearing mostly used in clocks.

Magnetic Bearing

In this bearing a magnetic field carries the load.

These are generally applicable in generators and sometimes special types of motor.

Flexure Bearing

In this bearing a load element (which turns) shelters the motion.

Parts of Bearing

There are following parts which is used in bearing.
  •  Inner Race
  • Outer Race
  • Rolling Element
  •  Cage

See in figure all parts of bearing

how many types of bearing
Parts of Bearing

Inner Race

This is the part which is mounted on the rotating shaft and it helps in rotating the shaft.

Inner race generally made from hot forging and then heat treated after that grinding and polishing is also done.

Outer Race

This is the part that is mounted on the housing and It stays steady.

It also performs the function of transferring loads from bearing to housing.

For making outer race same procedure applied as an inner race.

Rolling Element

These are the elements that carry the load and divide it into whole raceways.

They have a tendency to move around the inner race but the speed at which the inner race revolves.

This part of bearing only found in antifriction bearing which is also known as rolling element bearing.

Cage

This is an important element of bearing.

It acts as a barrier between a ball or roller and prevents them from colliding with each other.

It is also called as retainer as well as separator.


So, I hope friends these topic bearing in which we know in details how many types of bearing, part and their applications is useful for you. If any query you are free to ask me.

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