Page 32 - Rollingbearings

A.1 Bearing basics
Table 4
Basic designation system for SKF standard metric ball and roller bearings

Bearing series
6(0)4
544 623 (0)4
223 524 6(0)3 33
213 543 622 23
232 523 6(0)2 (0)3
222 542 630 23 22
241 522 6(1)0 32 12
231 323 534 16(0)0 22 (0)2 41
639
240
41
31
Bearing basics (1)23 249 303 533 609 7(0)4 814 60 20 60 (0)3
313
230
30
31
514
619
31
50
10
513
638
332
50
239
139
39
894
23
532
40
7(0)3
628
40
322
248
130
30
874
30
29
618
302
238
512
7(0)2
12
813
69
19
511
608
69
331
1(0)3
7(1)0
49
812
1(0)2
39
627
320
293
10
591
718
28
A.1 (0)33 (1)22 294 330 4(2)3 510 637 719 893 59 38 49 (0)2
39
708
811
329
4(2)2
292
1(1)0
19
48
617
18
(0)32
590
Bearing type
NC, NCF
NF, NFP NNF
NJ, NJF, NJP NNC
NP, NPF NNCF
NU, NUH NNCL
NUP, NUPJ NNU
(0) 1 2 3 4 5 6 7 8 C N NN QJ
Radial bearings Thrust bearings
Width (B, T) Height (H)
8 0 1 2 3 4 5 6 7 9 1 2
H
T Diameter series
B D
7 8
9
0 1
Dimension 2 3 4
series
X X X X X
Bearing series Size
d/5
Code Bearing type Code Bearing type Code Bearing type
0 Double row angular contact ball bearing 7 Single row angular contact ball bearing QJ Four-point contact ball bearing
1 Self-aligning ball bearing 8 Cylindrical roller thrust bearing T Tapered roller bearing in accordance with
2 Spherical roller bearing, spherical roller C CARB toroidal roller bearing ISO 355
thrust bearing N Cylindrical roller bearing. Two or more
3 Tapered roller bearing letters are used to identify the number of
4 Double row deep groove ball bearing the rows or the coniguration of the
5 Thrust ball bearing langes, e.g. NJ, NU, NUP, NN, NNU,
NNCF
6 Single row deep groove ball bearing
30