Home
Back
Formula Used:
| From: | To: |
The reliability of bearing system is the minimum percentage probability of 90% of a group of identical bearings system achieving their L10 design life expectancy. It represents the overall reliability of a system containing multiple bearings.
The calculator uses the formula:
Where:
Explanation: The system reliability is calculated by raising the individual bearing reliability to the power of the number of bearings in the system.
Details: Calculating system reliability is crucial for predicting the overall performance and lifespan of mechanical systems containing multiple bearings, helping engineers design more reliable and efficient systems.
Tips: Enter the reliability of individual bearing (value between 0-1) and the number of bearings in the system. All values must be valid (reliability 0-1, number of bearings ≥1).
Q1: What does L10 design life mean?
A: L10 design life is the life expectancy that 90% of a group of identical bearings will achieve or exceed before fatigue failure occurs.
Q2: Why does system reliability decrease with more bearings?
A: System reliability decreases because the probability of any single bearing failing increases with more bearings in the system, following the multiplication rule of probabilities.
Q3: What is a typical reliability value for bearings?
A: Typical bearing reliability values range from 0.9 to 0.99, with higher values indicating more reliable bearings.
Q4: Can this formula be used for different types of bearings?
A: Yes, the formula applies to any type of bearing as long as the reliability values are accurately determined for that specific bearing type.
Q5: How can I improve system reliability?
A: System reliability can be improved by using higher quality bearings (higher R value), implementing redundancy, or reducing the number of bearings in critical paths.