About Bearing Life Calculator

The Bearing Life Calculator helps engineers estimate the expected life of a bearing using the standard L10 formula. L10 life means 90% of identical bearings will last at least this long under given conditions.

Formulas Used

• L10 = (C / P)^p million revolutions
• L10h = (10⁶ × L10) / (60 × N)

Where:
C = Dynamic Load Rating [N]
P = Equivalent Load [N]
N = Speed [RPM]
p = 3 (ball bearings), 10/3 (roller bearings)

Applications

Engineers use bearing life calculation in:

• ✅ Machine design
• ✅ Automotive engineering
• ✅ Robotics
• ✅ Industrial machinery

FAQs

1. What is L10 life in bearings?

L10 life is the time at which 90% of bearings in a group will still be operational under the same load and speed.

2. Why do ball and roller bearings have different exponents?

Ball bearings use exponent 3, while roller bearings use 10/3 due to different contact geometries.

3. Can lubrication affect bearing life?

Yes, lubrication, contamination, and temperature significantly affect real bearing life compared to calculated life.

4. Is calculated life always accurate?

No, it’s an estimate. Actual bearing life depends on operating environment and maintenance.