Bearing Life Model Calculator
Evaluate the basic rating-life formula using your own C/P ratio and exponent.
A QUICK WALKTHROUGH
How to use this tool
- Enter all values in the stated units.
- L₁₀=(C/P)^p million revolutions; L₁₀h=L₁₀×10⁶/(60n). Enter positive C/P, exponent p and speed n (rpm). C and P must use the same force unit. You must supply p explicitly; typical basic exponents are 3 for ball bearings and 10/3 for roller bearings. This is unadjusted arithmetic for a constant-load, constant-speed model, not bearing selection or an individual service-life prediction.
- Calculate
Formula and assumptions
L₁₀=(C/P)^p million revolutions; L₁₀h=L₁₀×10⁶/(60n). Enter positive C/P, exponent p and speed n (rpm). C and P must use the same force unit. You must supply p explicitly; typical basic exponents are 3 for ball bearings and 10/3 for roller bearings. This is unadjusted arithmetic for a constant-load, constant-speed model, not bearing selection or an individual service-life prediction.
Inputs stay in this browser.
Inputs stay in this browser.
GOOD TO KNOW
Common questions
How is the result calculated?
L₁₀=(C/P)^p million revolutions; L₁₀h=L₁₀×10⁶/(60n). Enter positive C/P, exponent p and speed n (rpm). C and P must use the same force unit. You must supply p explicitly; typical basic exponents are 3 for ball bearings and 10/3 for roller bearings. This is unadjusted arithmetic for a constant-load, constant-speed model, not bearing selection or an individual service-life prediction.