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Extended modified service life
For the lubricant ratio, we obtain:
ν
κ = — = 1,23
ν 1
If we assume the normal contamination of the lubricating oil, then:
e C = 0,7 thuse
e C · C U 0,7 · 57,1
——— = —–——— = 0,44
P 90,2
In the diagram Service life coefficient a DIN valid for radial roller bearings the following estimates can be made: a DIN = 1,7
If the probability of failure of 10 % continues to hold good, the extended modified service life is calculated from:
L nm = a 1 · a DIN · L 10 = 1 · 1,7 · 238 = 405 · 10 6 [revolutions]
L hnm = a 1 · a DIN · L h10 = 1 · 1,7 · 7945 = 13.507 [hours]
KRW 113