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SKF - Rolling Bearings

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Selecting bearing size using the life equations<br />

Contamination factor h c for<br />

– circulating oil lubrication<br />

– solid contamination level –/15/12 in accordance with ISO 4406<br />

– filter rating b 12(c) = 200<br />

Diagram 8<br />

h c<br />

0,1 0,3 0,5 0,7 0,9 1,1 1,3 1,5 1,7 1,9 2,1 2,3 2,5 2,7 2,9 3,1 3,3 3,5 3,7 3,9 4,1<br />

1,0<br />

0,9<br />

0,8<br />

0,7<br />

0,6<br />

0,5<br />

0,4<br />

0,3<br />

0,2<br />

0,1<br />

d m [mm]<br />

2 000<br />

1 000<br />

500<br />

200<br />

100<br />

50<br />

25<br />

B<br />

k<br />

Diagram 9<br />

Contamination factor h c for<br />

– circulating oil lubrication<br />

– solid contamination level –/17/14 in accordance with ISO 4406<br />

– filter rating b 25(c) = 75<br />

h c<br />

1,0<br />

0,9<br />

0,8<br />

0,7<br />

0,6<br />

0,5<br />

0,4<br />

0,3<br />

0,2<br />

0,1<br />

d m [mm]<br />

2 000<br />

1 000<br />

500<br />

200<br />

100<br />

50<br />

25<br />

0,1 0,3 0,5 0,7 0,9 1,1 1,3 1,5 1,7 1,9 2,1 2,3 2,5 2,7 2,9 3,1 3,3 3,5 3,7 3,9 4,1<br />

k<br />

79

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