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Bearing Life Calculator (L10)
Uses the ISO 281 basic rating life equation L10 = (C/P)^p × 10⁶ / (60n), where C is the dynamic load rating, P is the equivalent dynamic load, p = 3 for ball bearings and 10/3 for roller bearings, and n is shaft speed in rpm.
Inputs
From bearing datasheet.
Result
L10 — basic rating life
216.0 million revolutions
L10h — life in hours
2400 hours
≈ life at 24/7 duty
0.3 years
Notes & assumptions
- Reduce load P before increasing C — life rises with the cube of (C/P).
- Recompute L10mh with reliability and lubrication adjustment factors (a1, aISO) for critical duties.
Need a matching bearing? Tunnel Fox sources SKF, FAG, Timken, NSK and NTN.
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