Rivets

It's a long time since I did my apprenticeship, and I can't remember
the allowance formula for round head rivets.
How much do you leave sticking out before you start to peen it over? -
I thought it was 1 1/2 times the dia. but that seems to be far too
much.
Kev.
Reply to
kev
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You thought correctly. Finished shop head's diameter (the peened head) should be 1 1/2 times the original diameter, and 1/2 the orig. diameter in thickness. Thus, 1/4" rivet should extend 3/8" before peening. Resulting shop head should be 3/8" in diameter, and 1/8" thick (or tall). This is the standard practice for aircraft riveting; your application could be different.
Reply to
Dale Scroggins
Speaking of rivets, does anyone know of a reasonably priced source for iron dome head rivets? Specifically, 1/8" x 1/2".
Each war helm needs perhaps a hundred, you see, & they are getting both difficult to find & expensive.
Any UK leads welcome ;o))
Regards,
J. Kim Siddorn,
Reply to
Kim Siddorn
Bath ! Could hardly be nearer.
I made a few helms last year
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rivets for these were obtained mail-order from
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were generally a bit of a faff - wrong sizes in stock, that sort of thing.
So I went out to get a sandwich at lunchtime, walked around the corner 100 yards from the office and straight into Avery Knight & Bowlers (by Green Park station and Sainsburys)
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over the counter. Loads of them.
Reply to
Andy Dingley
============================ I've had a look in my garage and found approx 170 dome head ,1/8" x 1/2" rivets. I will bring them toClutton . Unfortunately I am unable to bring an engine as my tow car was rear ended by another and is in the bodyshop for repair. I will however bring my A40 Farina on Sun. Btw, What is the difference between helm and helmet? Mike.H.
Reply to
Mike.H.
"et" I thnk but he did not wear one in the film. Only a hooded coat :-))
Martin P
Mike.H. wrote:
Reply to
Campingstoveman
Thank you Martin,you have set my mind at rest and I can sleep soundly tonight. On the other hand surely it was "Et" and not "et"?.oh dear another sleepless night. Mike.H.
Reply to
Mike.H.
Nick, Look at it as deep in the sentence and not at the very beginning. You should now sleep effortlessly during the night :-))
Martin P
Reply to
Campingstoveman
That's very kind of you Mike, thank you. As things stand, I may be at Clutton on Saturday exhibiting, but more likely flash out there on the bike. However, Sunday I shall be out there bright and early with goodies & a "new" engine to show off.
Originally, "helm" indicated an armoured head covering that had cheek flaps & a full ventail of mail.
A "helmet" was a plainer, simpler device that had neither.
Now, gentlemen, is that true - or bluff ? ;o))
Regards,
J. Kim Siddorn,
Reply to
Kim Siddorn

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