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Permalink Reply by Clint L Gosch on February 28, 2014 at 6:46pm

I do not have an official answer for you, but I'll take a guess and maybe that will provoke some more educated answers:)  I'm guessing that the max height spec in conjunction with the min/max field head diameter helps guarantee the rivet has the proper swell to fill the hole.  This has bugged me for a while too, I'll have to remember to ask my tech advisor during his next visit.  Maybe it's just to make sure we used the right rivet length?  Hope someone else can add some insight.  Clint

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Permalink Reply by Tim Smart on March 1, 2014 at 11:47am

Hey Clint,

Makes more sense than what I've come up with.  Let me know if your tech adviser come up with anything.

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Permalink Reply by Doug MacDonald on March 1, 2014 at 3:57pm

The simple answer is if the shop head is too tall it will fold over as opposed to swell evenly.  A folded over stem will not provide the same strength as a properly bucked rivet.

Doug M

CH-701 from scratch

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Permalink Reply by Scott Sutton on March 1, 2014 at 6:28pm

Been many.......many years ago when I was in structural class at Gulfstream but basically Doug is right, the shop head will fold over and not really buck if it is too long. I shot many rivets on the job when I misjudged the rivet length only to have this happen and have to drill it back out. The shop head would always take on an oval shape when folded over and not bucked straight back down the shank.

Scott

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Permalink Reply by Tim Smart on March 2, 2014 at 4:35pm

Doug, Scott,

Thanks for you replies, your answers makes sense. I know that this wasn't crucial topic but it did bug me not knowing.

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