Riveting to Aluminimum Boom - Rivet Length
Printed From: Yachts and Yachting Online
Category: General
Forum Name: Repair & maintenance
Forum Discription: Questions & tips on the subject
URL: http://www.yachtsandyachting.com/forum/forum_posts.asp?TID=7657
Printed Date: 18 Aug 25 at 8:17am
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Topic: Riveting to Aluminimum Boom - Rivet Length
Posted By: MattT
Subject: Riveting to Aluminimum Boom - Rivet Length
Date 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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Replies:
Posted By: JimC
Date Posted: 14 Mar 11 at 2:53pm
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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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Posted By: MattT
Date 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...?
Cheers
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Posted By: tgruitt
Date 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
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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!
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Needs to sail more...
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Posted By: MattT
Date 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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Posted By: JimC
Date Posted: 14 Mar 11 at 3:18pm
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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!
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Posted By: MattT
Date Posted: 14 Mar 11 at 3:19pm
Thanks Jim, will keep an eye out for it.
Cheers
Matt
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