Calcolatrice Vita del Cuscinetto — Formula
## Rolling Bearing L10 Life
The L10 life is the number of revolutions (or hours) at which 90% of identical bearings will survive.
### Formula
**L10 = (C/P)^p x 10^6 revolutions**
**L10h = L10 / (60 N)** (hours)
where C is the dynamic load rating from the manufacturer, P is the equivalent dynamic bearing load, N is speed in RPM, and p is the life exponent (3 for ball bearings, 10/3 for roller bearings).
The L10 life is the number of revolutions (or hours) at which 90% of identical bearings will survive.
### Formula
**L10 = (C/P)^p x 10^6 revolutions**
**L10h = L10 / (60 N)** (hours)
where C is the dynamic load rating from the manufacturer, P is the equivalent dynamic bearing load, N is speed in RPM, and p is the life exponent (3 for ball bearings, 10/3 for roller bearings).
Esempio Risolto
A ball bearing with C=50 kN, operating load P=10 kN, at 1500 RPM.
- C/P = 50/10 = 5
- L10 = 5^3 x 10^6 = 125 x 10^6 = 125,000,000 rev
- L10h = 125,000,000 / (60 x 1500) = 1,388.9 hours
- At 8 hours/day, this is about 174 operating days.