Calculator

Bearing life (L10 / L10h)

ISO 281: L10 = (C/P)^p million revolutions, L10h = L10 · 10⁶ / (60·n) operating hours. C and P come from the bearing catalogue for the selected bearing.

Dynamic life

Bearing typeReliability

Dynamic load rating C (kN)

Equivalent dynamic load P (kN)

Speed n (rpm)

L10 (basic): 125 × 10⁶ rev
L10h (basic, hours): 1.389 h

Static safety

Static load rating C0 (kN)

Equivalent static load P0 (kN)

Enter C0 and P0 to check static safety.

Use the bearing fits tool for the shaft/housing fit →

CURRENT STANDARD · TABLE LOOKUP

Before use: For a final life calculation: use the full method from the bearing catalogue (aISO, X/Y factors, contamination grade).

Validity: Requires C, P (and for the static check C0, P0) from the bearing catalogue

Assumptions: Only the basic life formula (L10) and the a1 reliability factor. No aISO lubrication/contamination modifier, no X/Y load factors to derive P from radial/axial load — enter the already-computed equivalent load(s).

Source details

ISO 281:2007 — basic (L10) and reliability-adjusted rating life · Verify

Checked 2026-09-17