Bearing Life Calculator (L10)
Million-revolution and hour life of a rolling bearing from load ratio.
The cube law is merciless: halve the load, EIGHT times the life. L10 means 10% failed — median life runs ~5× longer. Most bearings still die of dirt and bad fits, not fatigue.
Formula
Bearing Life Calculator (L10) is a free bearing life l10 for mechanical and machine-design engineers — instant, accurate and 100% client-side, with the governing formula and reference shown next to the result so the number can be defended, not just quoted.
About Bearing Life Calculator (L10)
Million-revolution and hour life of a rolling bearing from load ratio. The calculation implements L₁₀ = (C/P)^p million rev; L₁₀ₕ = L₁₀·10⁶/60N (ISO 281; SKF/FAG catalogues). The cube law is merciless: halve the load, EIGHT times the life. L10 means 10% failed — median life runs ~5× longer. Most bearings still die of dirt and bad fits, not fatigue.
How to use Bearing Life Calculator (L10)
- 1Enter Dynamic capacity C (from catalogue) in N (6308: 41 kN · 6206: 19.5 · 6210: 35).
- 2Enter Equivalent dynamic load P in N.
- 3Enter Speed in rpm.
- 4Enter Type (1 ball (p=3) · 2 roller (p=10/3)).
- 5Read L10 life, L10h life instantly — no submit button needed.
- 6Need US units? Flip the SI/Imperial toggle and every field converts.
Why use Bearing Life Calculator (L10)?
- ✓Implements the standard formula — L₁₀ = (C/P)^p million rev; L₁₀ₕ = L₁₀·10⁶/60N
- ✓Reference cited on-page: ISO 281; SKF/FAG catalogues
- ✓One-click SI ⇄ Imperial toggle — values convert in place, physics stays in SI
- ✓Live worked example: the substitution recomputes from your numbers
- ✓Runs entirely in your browser — nothing uploaded, free forever
Frequently asked questions
What formula does the Bearing Life Calculator (L10) use?+
It computes L₁₀ = (C/P)^p million rev; L₁₀ₕ = L₁₀·10⁶/60N, per ISO 281; SKF/FAG catalogues. The formula is displayed under the result along with a worked example substituted with your own inputs.
What should I keep in mind when using this calculator?+
The cube law is merciless: halve the load, EIGHT times the life. L10 means 10% failed — median life runs ~5× longer. Most bearings still die of dirt and bad fits, not fatigue.
Is this suitable for machine design coursework?+
Yes — these are the exact Shigley/Machinery's-Handbook formulas, with the substitution shown step by step, so you can follow the worked example into your own calculation sheet.
Is the Bearing Life Calculator (L10) free to use?+
Yes — completely free, no sign-up, no limits. It runs client-side in your browser, so inputs stay private and results are instant even on slow connections.
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