The lifespan of thin section bearings, like all bearings, isn’t a fixed number of years but is rather determined by a complex interplay of factors, primarily expressed as their “rating life” or L10 life.
How Long Do Thin Section Bearings Last
L10 Life (Basic Rating Life):
This is a standard industry measure. The L10 life is the life in millions of revolutions that 90% of a representative group of identical bearings can be expected to achieve or exceed before material fatigue occurs. The life that 50% of bearings may achieve (L50 or median life) es aproximadamente 5 times the L10 life.
How is it calculated?
The L10 life can be estimated using a formula:L10=(C/P)p, where:
L10 = basic rating life (millions of revolutions)
do = Dynamic load rating (from the manufacturer’s catalog)
PAG = Equivalent dynamic bearing load (actual load applied)
p = exponent (3 for ball bearings, 10/3 for roller bearings)
f the speed is constant, it’s often more practical to calculate the life in operating hours:L10h=(106/(60∗n))∗L10, wheren is the rotational speed in revolutions per minute (r/min).
Key Factors Influencing Thin Section Bearing Life:
Load: This is arguably the most critical factor. Higher loads significantly reduce bearing life. It’s generally not advisable to apply loads equal to the dynamic load ratings for continuous rotation if a long life is desired.
Velocidad: Higher rotational speeds can generate more heat and affect lubricant performance, impacting life.
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