1. What is Reliability of Bearing?

Reliability of bearing is the minimum percentage probability of 90% of a group of identical bearings system achieving their L10 design life expectancy.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( R \) — Reliability of Bearing
• \( R_s \) — Reliability of Bearing System
• \( N_b \) — Number of Bearings

Explanation: This formula calculates the individual bearing reliability based on the overall system reliability and the number of bearings in the system.

3. Importance of Reliability Calculation

Details: Accurate reliability estimation is crucial for bearing system design, maintenance planning, and predicting the lifespan of mechanical systems containing multiple bearings.

4. Using the Calculator

Tips: Enter reliability of bearing system (value between 0 and 1) and number of bearings (must be a positive integer). All values must be valid for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What does L10 life expectancy mean?
A: L10 life is the number of hours in service that 90% of the bearings will survive. It's a standard measure of bearing reliability.

Q2: How does the number of bearings affect reliability?
A: As the number of bearings increases, the individual bearing reliability required to maintain the same system reliability decreases.

Q3: What is a typical reliability value for bearings?
A: Most bearing applications aim for 90% reliability (0.9), meaning 90% of bearings will reach their rated L10 life.

Q4: Can this formula be used for different types of bearings?
A: Yes, the formula applies to any type of rolling element bearing where the reliability relationship follows the exponential distribution.

Q5: What factors affect bearing reliability?
A: Load conditions, lubrication, operating temperature, contamination levels, and installation quality all significantly impact bearing reliability.