GearmanPE, good advice. In my case, I can't envision a case where loading direction would flip-flop (load hanging from a rope, force always in roughly the down direction).
I have been told by equipment mfgs that my org's (Coast Guard) maintenances policies are more conservative than both Navy...
Thanks chicopee, my co-worker who has done calcs like this before said that if the gap between the clevis and rod is significant, and if the pin fit is loose, bending stress gets significant. I'll keep digging on this end. Thanks for your help.
Chicopee, the cranes are all boom/hydraulic (all pinned connections, booms pinned to turrets and hydraulic actuators). I am primarily interested in the pinned connection between the boom and turret (most expensive to disassemble).
My org frequently removes booms to inspect pins/bushings (once...
EdDanzer, Thanks, good advice, I'm going to go down the path of classifying the fits of the various pined joint we have per Machinery's Handbook and ANSI B4.1, and then come up with a scheme for bushing/pin renewal when a fit widens out of it's class. I'll post my plan when it is done, invite...
EdDanzer, thanks for the response. Let me explain further. Agree, typically, the operator will define the maintenance schedule, but not in my org. I am trying to dismantle some wacky cultural practices (schedule-based over-maintenance) and move more toward a CBM approach. I'm not really...
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...
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...
