Bearing Life Calculator
Calculate bearing fatigue life using L10 life rating based on load and speed conditions
About this calculator
The Bearing Life Calculator determines the expected fatigue life of rolling element bearings using the L10 life rating methodology. This tool calculates how long a bearing will operate before 10% of identical bearings fail due to material fatigue under specific load and speed conditions. Engineers use this calculator for maintenance planning, bearing selection, and reliability analysis in mechanical systems. Accurate bearing life prediction helps prevent unexpected failures, reduces downtime, and optimizes replacement schedules in industrial applications.
How to use
Enter the bearing's basic dynamic load rating (C), applied radial or axial load (P), and operating speed in RPM. The calculator applies the standard L10 life formula to compute the bearing life in hours or revolutions. Higher load ratings and lower applied loads result in longer bearing life expectancy.
Frequently asked questions
What is L10 bearing life?
L10 life represents the operating time when 10% of identical bearings will fail due to material fatigue under specified conditions.
How does load affect bearing life?
Bearing life decreases exponentially with increased load. Doubling the load typically reduces life by approximately 87% for ball bearings.
What factors influence actual bearing life?
Lubrication quality, contamination, temperature, misalignment, and installation practices significantly affect actual bearing performance beyond calculated L10 life.