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Riveting to Aluminimum Boom - Rivet Length
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MattT View Drop Down
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    Posted: 14 Mar 11 at 1:17pm
Hi All

I need to rivet a couple of fittings to an alu boom (specifically on an Enterprise) - I just need some confirmation that the rivets I have are the correct length.  The rivets are 4.0x10mm, with a specified grip range of 3.5mm-5.5mm. The fittings are about 1.5mm thick which means the boom wall thickness needs to be 2mm-4mm thick - does this sound about right for an Enterprise boom?

Or would I be better off with the 4.0x8mm rivets, with a grip range of 3mm-5mm?
Or does it not make that much difference...?

And before anyone asks - yes the rivets are stainless steel, and yes there is Tef-Gel going on everything :)

Cheers
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JimC View Drop Down
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Posts: 6662 		Post Options Post Options   Quote JimC Quote  Post ReplyReply Direct Link To This Post Posted: 14 Mar 11 at 2:53pm
A 4mm boom would be astonishing I think, but isn't there an exposed end you can put a calipher on?
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MattT View Drop Down
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Posts: 4 		Post Options Post Options   Quote MattT Quote  Post ReplyReply Direct Link To This Post Posted: 14 Mar 11 at 2:57pm
Yeah, I did think 4mm would be a bit on the large side...I was more worried about it being less than 2mm making the rivets not hold tight enough...

What did you mean by an exposed end ?  Of the rivet...?

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tgruitt View Drop Down
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Posts: 2479 		Post Options Post Options   Quote tgruitt Quote  Post ReplyReply Direct Link To This Post Posted: 14 Mar 11 at 3:07pm
Originally posted by MattT

Yeah, I did think 4mm would be a bit on the large side...I was more worried about it being less than 2mm making the rivets not hold tight enough...

What did you mean by an exposed end ?  Of the rivet...?

Cheers



I think Jim means an exposed end of the boom, so that you can measure the wall thickness of it as 4mm sounds like a very thick boom!
Needs to sail more...
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MattT View Drop Down
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Posts: 4 		Post Options Post Options   Quote MattT Quote  Post ReplyReply Direct Link To This Post Posted: 14 Mar 11 at 3:09pm
 Cheers - I realised that's what he meant about 30 seconds after I clicked "Post Reply"! There probably is - I just need to get down to the club to have a look at it...
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JimC View Drop Down
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Posts: 6662 		Post Options Post Options   Quote JimC Quote  Post ReplyReply Direct Link To This Post Posted: 14 Mar 11 at 3:18pm
The only other thing you might have to watch out for is if the boom has been sleeved internally to beef up the high load area... Frankly I'd be astonished if this was the case on an Enterprise, but as soon as you've drilled the hole you'll be able to see. I'd be quite suprised if the shorter rivets weren't better, and even more suprised if it makes any great difference!

Edited by JimC - 14 Mar 11 at 3:20pm
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MattT View Drop Down
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Posts: 4 		Post Options Post Options   Quote MattT Quote  Post ReplyReply Direct Link To This Post Posted: 14 Mar 11 at 3:19pm
Thanks Jim, will keep an eye out for it.

Cheers
Matt
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