Rolling Bearing Life L10
Calculate nominal bearing service life per ISO 281 — for ball bearings and roller bearings.
Enter Bearing Data
Data from the bearing catalog and operating parameters.
From bearing catalog
Axial and radial load combined
Formula (ISO 281)
L10h = L10 × 10⁶ / (60 × n)
P = Equivalent load [N or kN]
p = 3 (ball bearing) | 10/3 (roller bearing)
n = Operating speed [min⁻¹]
L10 = Nom. service life [10⁶ revolutions]
L10h = Nom. service life [hours]
What Does L10 Mean?
L10 is the operating duration that 90% of a bearing series will exceed under identical conditions. Statistically, only 10% of bearings fail before reaching L10.
Note: This calculation provides the nominal L10 service life. The modified L10mh (per ISO 281 Annex 1) additionally accounts for lubrication conditions, contamination, and system parameters.
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