A person dealing with electrical equipment like motors, generators etc should have the knowledge of all types of Bearings used in equipment. Considering Bearing’s importance, this post will discuss different types of bearings along with their identification type codes and a brief description.

Types of Bearings and their Type Codes

The Type Codes of various Bearings are: –

Bearing Name

Type Code

Self aligning Ball Bearing

1

Spherical Roller Bearing

2

Double row Angular contact Ball bearing 3
Double row Ball Bearing

4

Thrust Ball bearing

5

Single row deep groove ball bearing

6

Single row angular contact bearing

7

Felt seal bearing

8

Tapered Roller Bearing

32 / T

Inch Bearing

R

Cylindrical roller bearing

N

Double row roller bearing

NN

Needle roller bearing

NA

Needle roller bearing with closed end (Drawn cup)

BK

Needle roller bearing with open ends (Drawn cup)

HK

CARB toroidal roller bearings

C

Needle roller and cage thrust assembly

K

Four-point contact ball bearings

QJ

Types of Bearings with Brief Description

The various types of bearings available in the market are:

1. Self aligning Ball Bearing (Type Code 1)

Types of bearings - Self align This type of bearing has double rows of balls and a concave raceway in outer side.

2. Spherical Roller Bearing (Type Code 2)

Types of bearings - Spherical This type of bearing has double rows of rollers, a concave raceway in outer side and double raceways in inner side.

3. Double row Angular contact Ball bearing (Type Code 3)

Double row Angular contact Ball bearing This type of bearing has double rows of balls and double concave raceway in outer side and inner side.

4. Double row Ball Bearing (Type Code 4)

Double row Ball Bearing This type of bearing has its design similar to single row ball bearing. The only difference is that it has double rows of balls.

5. Thrust Ball bearing (Type Code 5)

Thrust Ball bearing This type of bearing has washer type raceway in both sides surrounding the caged rolling balls. They are used where rotation is required between parts of a system.

6. Single row deep groove ball bearing (Type Code 6)

Single row deep groove ball bearing They are the most commonly used ball bearings. Suitable for small axial loads.

7. Single row angular contact bearing (Type Code 7)

Single row angular contact bearing They are generally used for axial and radial loads. But only in one direction.

8. Felt seal bearing (Type Code 8)

Felt seal bearing This type of bearing contains one or more felt seals. Its inner raceway is a bit large. This is to ensure that the seal edge should not go beyond inner raceway.

9. Tapered Roller Bearing (Type Code 32/T)

Tapered Roller Bearing This type of bearing is most commonly used for wheels. They have rollers in place of balls and are conical in shape. They can withstand high axial/radial loads.

10. Inch Bearing (Type Code R)

Available in various shapes and designs They are ball bearings with one row and are available in various inch sizes.

11. Cylindrical roller bearing (Type Code N)

These types of bearings use cylinders as rollers in place of balls. They are available in various shapes and designs.

12. Double row roller bearing (Type Code MN)

Available in various shapes and designs As the name suggests, they have two rows of rollers. They can withstand heavy loads.

13. Needle roller bearing (Type Code NA)

These types of bearings contain cylinders as rollers. They are name so because the length of the cylinder used is much more in comparison to its diameter.

14. Needle roller bearing with closed end (Drawn cup) (Type Code BK)

These types of needle roller bearings are made closed type to protect it from any moisture ingress and external contaminants. They hold the grease within it.

15. Needle roller bearing with open ends (Drawn cup)(Type Code HK)

These types of needle roller bearings are same as needle roller bearing with closed end except that its both ends are open.

16. CARB toroidal roller bearings (Type Code C)

It contains the properties of both spherical rollers as well as cylindrical rollers i.e. it is self-aligning as well as free in axis.

17. Needle roller and cage thrust assembly (Type Code K)

They are similar to Thrust ball bearing except that they contains cylindrical rollers in place of balls.

18. Four-point contact ball bearings (Type Code QJ)

They are similar to single row angular contact ball bearing except than in this case, both the inner and outer raceways are split in two half sections.
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