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FT Series Life Curves
The expected life of a force tube actuator is expressed as the travel distance that 90% of the actuators are expected to exceed before experiencing metal fatigue.

The formula that defines this value is:

L10 = (C/F)3 x S where

C = Dynamic load rating (lbs)
F = Cubic mean applied load (lbs.)
S = Roller screws lead (inches)

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