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rivets
gutball - 14/10/05 at 10:26 AM

Whats the type of rivets that are closed and leave a chunk of the mandrel inside so there's no hole?

Don't tell me, its closed isn't it?!?

After some stainless ones.

David Jenkins - 14/10/05 at 10:33 AM

You are describing 2 different things!

There's the closed-end rivet, which has the end that goes into the hole fully closed (obviously!).

There is also the rivet that leaves the mandrel across the join, which makes it very strong in shear. "Cherry" is a name that comes to mind.

If your lucky, you may find rivets that are closed, and leave the mandrel in place!

Confused? You will be!

David

andyace - 14/10/05 at 10:42 AM

www.prifast.co.uk

Closed end rivets, alu body, stainless mandrel 4 x 9.5

£22.97 per 1000

email : mailroom@prifast.co.uk for more info

Mix - 14/10/05 at 11:14 AM

Standard pop rivets will retain the head in the tubular section of the rivet provided the correct length rivet is used.
Belt and braces method is to dip the rivet into adhesive before setting
Cherrys and others like them are technically structural rivets, much stronger, manufactured to aircraft specification and hence a tad expensive.

Mick

Bluemoon - 14/10/05 at 12:17 PM

Sorry to highjack the thread, but what type of rivets are poeople using?

I'm worryed that the cheaper Pop rivets will undo with vibration Monobolts seem ideal, but expensive.

Cheers

Dan

andyace - 14/10/05 at 12:32 PM

As above Closed end rivets, alu body, stainless mandrel 4 x 9.5 for fixing ali panels sealed with PU adhesive..

When popped adhesive forces around the rivet nicely sealing off any way into the chassis.

Strolls - 14/10/05 at 12:42 PM

quote:
Originally posted by andyace... sealed with PU adhesive.. When popped adhesive forces around the rivet nicely sealing off any way into the chassis.

Sorry... dumb question... what's "PU" adhesive? A Google just returns a bunch of Chinese glue manufacturers.

Stroller.

chrisf - 14/10/05 at 12:58 PM

He's looking for the aircraft spec Cherry Q rivets--as the others mentioned. The cheapest place I've found them is at Aircraft Spruce. They are in the US but ship internationally for reasonable cost. Their website is a bit of a nightmare to figure out what rivet is appropriate though.

I used the Cherry Q alu rivets with a alu shank. They also have monel shank rivets--which are a bit more.

--Best of luck, Chris

David Jenkins - 14/10/05 at 01:05 PM

quote:
Originally posted by Strolls

Sorry... dumb question... what's "PU" adhesive? A Google just returns a bunch of Chinese glue manufacturers.

Stroller.


Polyurethane adhesive - trade names include Sikaflex, Tiger Seal, and so on. Comes in those industrial tubes with a spout, which you have you put into a handle thingy that squeezes it out.

V. sticky, and gives a very strong but flexible bond - with good surface preparation it's almost impossible to break it.

The brands I named are the most expensive - the better on-line decorators' supply houses sell it far cheaper.

David

_Aero_ - 14/10/05 at 01:06 PM

PU Adhesive is Polyurethane Adhesive. There are a number of types available... mostly based for Marine Work seem to perform best. Tradenames include Texflex, Adflex, Sikaflex, Tigerflex etc etc. It's extremely good, too good in some cases!, and on floors with PU Adhesive standard 5mm head pop rivets are more than adequate adding lots of chassis stiffness.

I know one guy who is considering not using rivets or mechanical fastening at all - you know who you are locost-lightening! It'll never get you to that infamous quote of 397Kg though...

Hope this answers some questions...