Basic bearing type,dimension code and bearing code

Posted on February 21, 2012 by admin

Bearing Type

Bearing Designation

Dimension Code

Basic code

Dounle row angular contact ball bearing

（0）
（0）

32
33

3200
3300

Self-aligning ball bearing

1
（1）
1
（1）

（0）2
22
（0）3
23

1200
2200
1300
2300

Spherical roller bearing

2
2
2
2
2
2
2
2

13
22
23
30
31
32
40
41

21300
22200
22300
23000
23100
23200
24000
24100

Thrust spherical roller bearing

2
2
2

92
93
94

29200
29300
29400

Taper

Roller

Bearing

 

Taper roller bearing

3
3
3
3
3
3
3
3
3
3

02
03
13
20
22
23
29
30
31
32

30200
30300
31300
32000
32200
32300
32900
33000
33100
33200

Doule row taper roller

Bearing(Double inner ring)

35
35
35
35
35
35
35
35

29
19
20
10
21
11
22
13

352900
351900
352000
351000
352100
351100
352200
351300

Four row taper roller bearing

38
38
38
38
38
38

29
19
20
10
21
11

382900
381900
382000
381000
382100
381100

Double row deep groove

ball bearing

4
4

(2)2
(2)3

4200
4300

Thrust

Ball

Bearing

 

Thrust ball bearing

5
5
5
5

11
12
13
14

51100
51200
51300
51400

Double direction

Thrust ball bearing

5
5
5

22
23
24

52200
52300
52400

Thrust ball bearings, single direction, sphered housing washer

5
5
5

32
33
34

53200
53300
53400

Thrust ball bearings, double direction, sphered housing washers

5
5
5

42
43
44

54200
54300
54400

Axial angular contact ball bearing

56

-

560000

Double direction

 Axial angular contact ball bearing

23
23
23

44
47
49

234400
234700
234900

Deep

Groove

Ball

Bearing

Deep groove ball bearing

6
6
6
6
16
6
6
6
6

17
37
18
19
（0）0
（1）0
（0）2
（0）3
（0）4

61700
63700
61800
61900
16000
6000
6200
6300
6400

Deep groove ball bearings with filling slots

（6）

（0）2
（0）3

200
300

Angular

Contact

Ball

Bearing

 

Angular contact ball bearing

7
7
7
7
7

19
（1）0
（0）2
（0）3
（0）4

71900
7000
7200
7300
7400

Locking in the inner ring
Angular contact ball bearings

 

B7

(1)0
(0)2
(0)3

B7000
B7200
B7300

Separable Angular contact

ballbearing

S7

19
(1)0
(0)2
(0)3

S71900
S7000
S7200
S7300

Four point angular contact

Ball bearing

QJ

10
(0）2
（0）3

QJ1000
QJ200
QJ300

Thrust

Roller

Bearing

Thrust roller bearing

8
8

11
12

81100
81200

Double and Multi row

Thrust roller bearing

8
8
8

93
74
94

89300
87400
89400

Double direction

Thrust roller bearing

8
8

22
23

82200
82300

Thrust taper roller bearing

9

-

90000

Cylindrical

 

Roller

 

Bearing

 

Without flanges on the

Outer ring

N

10
(0)2
22
(0)3
23
(0)4

N1000
N200
N2200
N300
N2300
N400

Without flanges on the

Inner ring

NU

10
(0)2
22
(0)3
23
(0)4

NU1000
NU200
NU2200
NU300
NU2300
NJ400

One integral flange on

The inner ring

NJ

(0)2
22
(0)3
23
(0)4

NJ200
NJ2200
NJ300
NJ2300
NJ400

the inner ring one integral flange and one non-integral flange in the form of a loose flange ring

NUP

(0)2
22
(0)3
23

NUP200
NUP2200
NUP300
NUP2300

The outer ring one internal flange

and a loose flange ring

NF

(0)2
(0)3
23

NF200
NF300
NF2300

Double row cylindrical roller bearing

NN

30
49

NN3000
NN4900

Inner ring without flanges double row

Cylindrical roller bearing

NNU

49

NNU4900

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How to measure a bearing

Posted on February 21, 2012 by admin

Bearing Sizes

 

Each bearing has an inside diameter, outside diameter and width diameter in that order. Most bearings are metric in size, but can also be imperial. On our site, each bearing shows its principal dimensions.

d = Inside diameter
D = Outside diameter
B/T = Width diameter

You can search for a bearing entering this information on the home page in the boxes provided.

Once you have identified the bearing’s code some bearings come complete with seals or shields. This is known as the suffix in the bearings reference.

Bearing Example

6205 2RS1C3

The bearing type design that you need is a single row deep groove ball bearing with the following dimensions and suffix.

d = 25mm
D = 52mm
B/T = 15mm

Result = 6205

The bearing also has a seal either side of the bearing.

2RS1 = 2 Rubber seals
2RSR = 2 Rubber seals
DDU = 2 Rubber seals
2Z = 2 Metal shields
ZZ = 2 Metal Shields

Result = 6205 2RS1

And the internal clearance being C3 means that the bearing has room for expansion if needed between the races of the bearing, whilst holding the outer ring and moving the inner ring in a radial movement you will detect a little amount of play between the 2 rings. All standard clearance bearings have this movement, it may only be a small amount of movement but is controlled by international standards. C3 means the bearing has more clearance than standard.

For example we may use C3 clearance on bearings where a cold start up application my cause the balls to heat up quickly, the heat needs to go somewhere. Some of the heat gets passed through the outer race to the housing and the inner race to the shaft, this causes expansion which closes up the clearance in the bearing. If you did not allow for this clearance the bearing would not have room for expansion and lead to bearing failure.

C2 = Clearance less than normal
C3 = Clearance greater than normal
C4 = Clearance greater than C3

Result = 6205 2RS1C3

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Hello world!

Posted on September 19, 2011 by admin

Welcome to WordPress. This is your first post. Edit or delete it, then start blogging!

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