1. What is Rated Bearing Life?

Rated Bearing Life is defined as the total number of million revolutions the bearing rotates before failure. It is a crucial parameter in mechanical engineering for predicting bearing performance and reliability.

2. How Does the Calculator Work?

The calculator uses the Rated Bearing Life formula:

Where:

• \( L_{10} \) — Rated Bearing Life (million revolutions)
• \( N \) — Speed of bearing in rpm
• \( L_{10h} \) — Rated Bearing Life in hours

Explanation: This formula converts the rated life from hours to million revolutions by accounting for the bearing's rotational speed.

3. Importance of Rated Bearing Life Calculation

Details: Accurate calculation of rated bearing life is essential for proper bearing selection, maintenance scheduling, and ensuring reliable operation of mechanical systems.

4. Using the Calculator

Tips: Enter the bearing speed in RPM and the rated life in hours. Both values must be positive numbers for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What does L10 represent in bearing life?
A: L10 represents the rated life where 90% of a group of identical bearings will complete or exceed before fatigue failure occurs.

Q2: How is bearing speed measured?
A: Bearing speed is typically measured in revolutions per minute (RPM) using tachometers or rotational speed sensors.

Q3: What factors affect bearing life?
A: Load conditions, lubrication, operating temperature, contamination levels, and installation accuracy all significantly affect bearing life.

Q4: When should this calculation be used?
A: This calculation is used during bearing selection process and for predicting maintenance intervals in mechanical systems.

Q5: Are there limitations to this formula?
A: This formula provides basic rated life calculation and doesn't account for extreme operating conditions, abnormal loads, or special bearing configurations.