WHAT IS BEARING NUMBER MEANING?

Bearing number is made by numbers and codes, it represented type, size, cover, etc.

  • Material 

Name

HRC

Chrome steel

60~65

Stainless steel

52~62

Carbon steel

55~60

Ceramic 

70~80

 

  • COVER

Type Code 

Meaning 

N

Snap ring groove

NR

Snap ring and groove

Blank

Open, no sealed

RS

One side rubber sealed

2RS

Double side rubber sealed

Z

One side metal sealed

ZZ

Double side metal sealed

LLU

Tight contact

LLH

Light contact

LLB

Non-contact

Tolerance (P)

Clearance (C)

 

Clearance

Use situation

Use example

C2、C0

Strict requirements to control noise and vibration, precise installation and coordination, and high positioning

Instruments, instrumentation equipment, electric motors, low noise, small motors, etc.

C0

General load, speed, working temperature is not high

Transmission machinery, reducer and other general machinery, etc.

C3

High temperature and high speed, high service life requirements

Car alternator

Engine

etc.

C3、C4

Use the occasions where the ambient temperature is high and it is not suitable for heat dissipation

Dryers

Paper machines

etc.

C4

High temperature and high speed, large impact load

Vibrating screen

Speed gear, etc.

C5

The inner and outer rings adopt the interference fit, the interference is large, the temperature is high, and the heat is not dissipated.

Vibration roller

Rear wheel of automobile and locomotive

etc.

Bearing Number Meaning of Angular Contact Ball Bearings

 

6006 2RS C0

Typed Code

Meaning

1

Self-aligning Ball Bearing

2

Spherical ball bearing

3

Double row Angular contact Ball Bearing

4

Double row ball bearing

5

Thrust ball bearing

6

Single row deep groove ball bearing

7

Single row angular contact

8

Felt Seal Bearing

TYPED

 

TOUGHNESS

Toughness Code

Meaning

0

Extra Light

1

Extra light thrust

2

Light

3

Medium

4

Heavy

8

Extra Thin Section

9

Very Thin Section

 

INNER DIAMETER

Miniature ball bearing (6xx)

 

Deep groove ball bearing (6xxx)

Last yards

Inner diameter

 

Last two yards

Inner diameter

1

1

00

10

2

2

01

12

3

3

02

15

4

03

17

5

5

after here (*5)

6

6

04 

4*5=20

7

7

05

5*5=25

8

8

06

6*5=30

9

9

?

? *5

 

 

Miniature

ball bearing

Deep groove

ball bearing

Thin wall

ball bearing

Inner diameter

Beyond 10mm

Over 10mm

Over 10mm

Model 

6xx

6xxx

68xx、69xx

 

Small tips about Miniature ball bearing

EX. 682  2*5*1.5mm

JIS (From China)    JIS (From China)       NMB (From Japan)     

682               =           MR52           =            L-520

 

To see further detail please refer to catalogue

https://iskbearing.com/wp-content/uploads/2020/08/deep-groove-ball-bearing-JOTA-CATALOG.pdf

https://iskbearing.com/wp-content/uploads/2020/08/miniature-ball-bearing-JOTA-CATALOG.pdf

Bearing Number Meaning of Angular Contact Ball Bearings

7006 C

SERIES

7000、7200、7300、5200、5300

INNER DIAMETER

Last two yards

Inner diameter

00

10

01

12

02

15

03

17

after here (*5)

04 

4*5=20

05

5*5=25

06

6*5=30

?

? *5

 

CONTACT ANGULAR

Code

Angular

A

30°

B

40°

C

15°

AC

25°

 

To see further detail please refer to catalogue

 

https://iskbearing.com/wp-content/uploads/2020/08/Angular%20Contact%20Ball%20Bearing.pdf

Bearing Number Meaning of Spherical Ball Bearings (Self-aligning Ball Bearing)

1308 K

SERIES

 1200, 1300, 2200, 2300, 11200, 11300

INNER DIAMETER

XXX

 

XXXX

Last yards 

Inner diameter

 

Last two yards

Inner diameter

1

1

00

10

2

2

01

12

3

3

02

15

4

03

17

5

5

after here (*5)

6

6

04 

4*5=20

7

7

05

5*5=25

8

8

06

6*5=30

9

9

?

? *5

 

Bore

Blank — Round bore 

K — Conical bore

 

To see further detail please refer to catalogue

 

https://iskbearing.com/wp-content/uploads/2020/08/Spherical%20Ball%20Bearing.pdf

 

Bearing Number Meaning of Spherical Roller Bearing

22315 CD

SERIES

21000, 22000, 22200, 22300, 23000, 23100, 23200, 24000, 24100

INNER DIAMETER

Last two yards times 5

Ex. 22315 CD — 75mm、24124 — 120mm、23272 CAK — 360mm

Bore

Retainer

CD

Steel retainer

CA

Copper retainer

Bore

Blank

Round bore (Standard)

K

Conical bore (taper 1:12)

K30

Conical bore (taper 1:30)

 

To see further detail please refer to catalogue

https://iskbearing.com/wp-content/uploads/2020/08/Spherical-Roller-Bearing.pdf

Bearing Number Meaning of Cylindrical Roller Bearing

NU2214 EWS

SERIES

NU、NJ、NUP、N、NF、NH、NNU、NN

LEVEL

CODE

Meaning

2XX

Light

3XX

Medium

4XX

Heavy

10XX

Extra light

22XX

Light, wide

23XX

Medium, wide

INNER DIAMETER

Last two yards times 5

Ex. NU2214 EWS— 70mm、NU409 — 45mm、NJ330 EM— 150mm

Design & Cage

Code

Meaning

E

High-Capacity Design

T

Polyamide Cage

M

Machined Brass Cage

W,WS

Pressed Steel

 

To see further detail please refer to catalogue

 

https://iskbearing.com/wp-content/uploads/2020/08/Cylindrical%20Roller%20Bearing.pdf

 

Bearing Number Meaning of Tapered Roller Bearing

HR30203 XJ

DESIGN

HR – High Capacity

SERIES

30200、30300、31300、32000、32200、32300、32900、33000、33100、33200

INNER DIAMETER

Last two yards

Inner diameter

00

10

01

12

02

15

03

17

after here (*5)

04 

4*5=20

05

5*5=25

06

6*5=30

?

? *5

special bore size

/22

22

/28

28

/32

32

 

Contact angle & Interchangeability

Code

Meaning

Contact Angle

Blank 

Standard angle (15ß to 17ß)

C

Medium angle (17ß to 24ß)

D

Steep angle (24ß and over)

Interchangeability

J

Cup angle and raceway diameter conform to ISO 355

X

Dimension series 32000 and 32900 the major dimensions conform to ISO 355

 

To see further detail please refer to catalogue

 

https://iskbearing.com/wp-content/uploads/2020/08/Tapered-Roller-Bearing.pdf

 

Bearing Number Meaning of Spherical Plain Bearing

GE12EPHS 8

SERIES

GE、SB、PHS、POS、RBH、CF、CFH

INNER DIAMETER

The numbers in these bearing number are exactly their inner diameter.

Ex. GE12E — 12mm、PHS 8 — 8mm、SB 25 — 25mm、CF 10 — 10mm …

 

To see further detail please refer to catalogue

 

https://iskbearing.com/wp-content/uploads/2020/08/Spherical%20Plain%20Bearing.pdf

 
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