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SKF - Rolling Bearings

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Basic bearing designation system<br />

Diagram 2<br />

Basic designation system for <strong>SKF</strong> standard metric ball and roller bearings<br />

Bearing series<br />

(0)33<br />

(0)32<br />

139<br />

130<br />

(1)23<br />

1(0)3<br />

(1)22<br />

1(0)2<br />

1(1)0<br />

223<br />

213<br />

232<br />

222<br />

241<br />

231<br />

240<br />

230<br />

249<br />

239<br />

248<br />

238<br />

294<br />

293<br />

292<br />

323<br />

313<br />

303<br />

332<br />

322<br />

302<br />

331<br />

330<br />

320<br />

329<br />

4(2)3<br />

4(2)2<br />

544<br />

524<br />

543<br />

523<br />

542<br />

522<br />

534<br />

514<br />

533<br />

513<br />

532<br />

512<br />

511<br />

510<br />

591<br />

590<br />

6(0)4<br />

623<br />

6(0)3<br />

622<br />

6(0)2<br />

630<br />

6(1)0<br />

16(0)0<br />

639<br />

619<br />

609<br />

638<br />

628<br />

618<br />

608<br />

637<br />

627<br />

617<br />

7(0)4<br />

7(0)3<br />

7(0)2<br />

7(1)0<br />

719<br />

718<br />

708<br />

814<br />

894<br />

874<br />

813<br />

893<br />

812<br />

811<br />

23<br />

32<br />

22<br />

41<br />

31<br />

60<br />

50<br />

40<br />

30<br />

69<br />

59<br />

49<br />

39<br />

29<br />

(0)4<br />

33<br />

23<br />

(0)3<br />

22<br />

12<br />

(0)2<br />

31<br />

30<br />

20<br />

10<br />

39<br />

29<br />

19<br />

38<br />

28<br />

18<br />

41<br />

31<br />

60<br />

50<br />

40<br />

30<br />

69<br />

49<br />

39<br />

48<br />

23<br />

(0)3<br />

12<br />

(0)2<br />

10<br />

19<br />

A<br />

Bearing type<br />

NC, NCF<br />

NF, NFP<br />

NJ, NJF, NJP<br />

NP, NPF<br />

NU, NUH<br />

NUP, NUPJ<br />

NNF<br />

NNC<br />

NNCF<br />

NNCL<br />

NNU<br />

(0) 1 2 3 4 5 6 7 8 C N NN QJ<br />

Radial bearings<br />

Width (B, T)<br />

8 0 1 2 3 4 5 6<br />

Thrust bearings<br />

Height (H)<br />

7 9 1 2<br />

H<br />

T<br />

B<br />

D<br />

Dimen sion<br />

series<br />

XXXXX<br />

Bearing series<br />

Size<br />

d/5<br />

7<br />

8<br />

Diameter series<br />

9<br />

0<br />

1<br />

2<br />

3 4<br />

Code Bearing type<br />

Code Bearing type<br />

Code Bearing type<br />

0 Double row angular contact ball<br />

bearing<br />

1 Self-aligning ball bearing<br />

2 Spherical roller bearing, spherical<br />

roller thrust bearing<br />

3 Tapered roller bearing<br />

4 Double row deep groove ball<br />

bearing<br />

5 Thrust ball bearing<br />

6 Single row deep groove ball bearing<br />

7 Single row angular contact ball<br />

bearing<br />

8 Cylindrical roller thrust bearing<br />

C<br />

N<br />

CARB toroidal roller bearing<br />

Cylindrical roller bearing. Two or<br />

more letters are used to identify the<br />

number of the rows or the<br />

configuration of the flanges, e.g.<br />

NJ, NU, NUP, NN, NNU, NNCF etc.<br />

QJ<br />

T<br />

Four-point contact ball bearing<br />

Tapered roller bearing in<br />

accordance with ISO 355<br />

43

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