I am trying to specify when to renew a pin or bushing (installed in crane booms), based on wear/loss of material (slopy fit), either in the pin or bushing, relate those dimensions to the remaining factor of safety still in the pin. I didn't design the crane, so I am reverse engineering all of this. I have found simple shear formulas, but I'm looking for something more detailed, like what the guy used to design the crane (like a spec for designing a pined connection). Have found system design std specs, and "theoretical" type formulas for shear/etc., but nothing "practical" for simple component design. Any advice whould be greatly appreciated.
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