About the Bearing Life Calculator Online Free Tool

The Bearing Life Calculator Online Free Tool estimates L10 bearing life in million revolutions and operating hours from dynamic load rating, equivalent load, speed, and bearing type.

How to Use the Bearing Life Calculator Online

1. Select ball or roller bearing.
2. Enter dynamic load rating C, equivalent load P, and operating speed.
3. Run the calculator to review L10 life in revolutions and hours.

Choosing Options Correctly

Use catalog C rating and equivalent dynamic load for the actual radial/axial loading case. Lubrication, contamination, temperature, misalignment, reliability factor, and duty cycle can significantly change real service life.

Common Use Cases

• Compare bearing options for a shaft design.
• Estimate whether a load increase reduces life too far.
• Convert catalog L10 life into operating hours.

Quick FAQ

What exponent is used?
Ball bearings typically use 3 and roller bearings often use 10/3 for the basic dynamic life relationship.

Is L10 the guaranteed life?
No. L10 means 90 percent of a large group of identical bearings are expected to reach that life under the stated conditions.

What inputs affect the answer most?
Equivalent load, speed, lubrication, contamination, temperature, and bearing type can change practical life dramatically.

Can I use this for final bearing selection?
Use it as a screening estimate, then verify rating life, static load, mounting, lubrication, seals, misalignment, and manufacturer guidance.