THE FEUTEX TOOLKIT

Bearing Basic Rating Life

Estimate basic L10 life from a supplied equivalent dynamic load.

Mechanical workspace● Runs in your browser

01 Your input

Basic dynamic load rating CNEquivalent dynamic load PNLife exponent: 3 ball or 10/3 rollerConstant rotational speedrpm

02 Your result

View or copy raw result data

Result data

FormulaL10=(C/P)^p million revolutions; hours=10⁶L10/(60n).

Sources and model references

https://evolution.skf.com/the-skf-formula-for-rolling-bearing-life/

Worked example

Inputs

Basic dynamic load rating C: 20000 N
Equivalent dynamic load P: 5000 N
Life exponent: 3 ball or 10/3 roller: 3
Constant rotational speed: 1000 rpm

Expected results

Basic L10 life: 64 million revolutions
Basic L10 operating hours: 1066.666667 h

Load the example in the workspace to reproduce these results. Display rounding does not change the underlying calculation.

How to use this tool

Enter every input in the labeled units; use measured or independently specified properties.
Check the stated model assumptions before calculating.
Interpret the output as a model estimate and verify it independently for the intended application.

Try this example

{
  "rating": 20000,
  "load": 5000,
  "exponent": 3,
  "rpm": 1000
}

Accuracy and scope

Basic statistical fatigue rating at 90% reliability, not service life; excludes lubrication, contamination, misalignment and static-load checks. Educational engineering estimate only; not structural or safety certification, equipment selection, or operating recommendations.

Is my data uploaded?

This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.