[TheForge] Rivet question

[David E. Smucker]

For the opposite problem -- rivet not tight enough -- brass has about 3
times the rate of expansion as does steel  If you apply even a little heat
and then finish heading as the rivet cools it will be very tight.  In fact
this can be a factor when you want the joint to move if you have it warm
when heading it will tighten much more than a steel rivet.

Have a great story about how tight rivets should be in tongs.  Jim McCarty
was assisting Jerry Darnell in a demo -- getting ready the night before Jim
notice that all of Jerry's tongs were very "loose" so we went through them
and tightened them all up.  Now Jerry does a lot of dropped tong forge welds
-- came time in the demo and the now tight tongs would not drop.  Jerry was
not a happy camper.

Dave Smucker
Brasstown, NC 

-----Original Message-----
From: TheForge [mailto:theforge-bounces at mailman.qth.net] On Behalf Of Bob
Ehrenberger
Sent: Sunday, March 01, 2015 11:21 PM
To: theforge
Subject: Re: [TheForge] Rivet question

From: TheForge [mailto:theforge-bounces at mailman.qth.net] On Behalf Of Peter
Fels & Phoebe Palmer
Sent: Sunday, March 1, 2015 2:20 PM
To: Blacksmithing List Sponsored by ABANA
Subject: Re: [TheForge] Test

OK.BS question:
I was assembling one of my  jointed bottle openers ( one that i had to take
back apart and forge on some more to get the parts to work right), and after
i'd set down and headed the 1/4" brass rivet, i had to spend 15 minutes
wiggling it back and forth to free it up.
Both holes were hot punched and the mating surfaces were hand forged so
nothing was accurately aligned.
What's the best, quickest way to keep the parts moving freely after the
rivet is set down?

-- Reply---
The best thing is to prevent the rivet from getting too tight in the first
place.
If you put a piece of card stock between the parts before riveting you can
remove it after riveting and there should be some clearance.  Also when
setting the rivet the lighter the hammer you use the easier it is to keep
the upset at the very end.

Bob Ehrenberger
Shelbyville, MO

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