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bolts or rivets?

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tmoore View Drop Down
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    Posted: 26 Jun 08 at 3:18pm

well my new rs300 boom arived today after my other one snapped in half last weekend. i have borrowed a rivetter from a guy at the club. but it occured to me that bolts would be easier and stronger. its for the block on the boom through which the kicker line goes and also the block to direct the outhaul from along the boom down to the deck.

well which is best to use, bolts or rivets and why? i would need to use stainless bolts but what about the rivets, dont i need a paste of some kind?

also, how do i drill the holes for these as the boom is round so how will i get the bit to stay still, i would centre punch but that would weaken the area around the hole. what do i do?

thanks tom

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Post Options Post Options   Quote JimC Quote  Post ReplyReply Direct Link To This Post Posted: 26 Jun 08 at 3:23pm
Always use bolts if you can - rivets are definitely second best, but the only choice for the many places where you can't get a spanner and a nut in place the other side. Either way you should use the horrible yellow anti-corrosion paste. I usually start holes with a small drill. Seems to work OK if you're careful.
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Post Options Post Options   Quote tmoore Quote  Post ReplyReply Direct Link To This Post Posted: 26 Jun 08 at 3:26pm

thanks jim, the blocks are going on the end so can get a spanner in fine.

will i be able to get that paste from B&Q? and the bolts do need to be stainless yes? the normal ones arent are they?

my other thought was to simply tie them on (instead of the metal eye). this would mean that if i need to remove the boom on the water i can just cut the rope rather than have to slice the kicker line again. or will these not last?

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Post Options Post Options   Quote Merlinboy Quote  Post ReplyReply Direct Link To This Post Posted: 26 Jun 08 at 3:44pm
Tom when i did my 300 boom recently i used stainless bolts which were actually already being used on the old boom although i think the outhall one was riveted on.  The anti corrison paste is available from chandleries and is usefull to have in your tool box.  i didnt have any problems withthe drill slipping just let the drill do the work and make sure its sharp!  I would always bolt the eyes on. One more thing only ever use stainless bolts on a boat.  You wont have to sre splice the rope again just make sure the double block (for kicker and downhall) is on the right way round and not twiseted when you re bolt it.  Hope this helps. 
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Post Options Post Options   Quote tmoore Quote  Post ReplyReply Direct Link To This Post Posted: 26 Jun 08 at 3:50pm

no russ, im doing it differently this time. the double block was twisting because of uneven tension on the kicker and cunningham. im using a single block and the cunni will have a 2;1 with the block on a rope going through the eye and dead ended on the boom. i need to splice everything again anyway because the kicker was cut......

is there anywhere else i could get the paste because i dont want to have to order again as i wont get it done in time for the weekend that way. you dont think replacing the eye with a rope loop will work then? or should i bolt them on, sail with it once and then i can add the paste before then next sail?

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Post Options Post Options   Quote tmoore Quote  Post ReplyReply Direct Link To This Post Posted: 26 Jun 08 at 9:31pm

this is what i meant, will it be ok?



Edited by tmoore
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Post Options Post Options   Quote JimC Quote  Post ReplyReply Direct Link To This Post Posted: 26 Jun 08 at 10:10pm
If you put the string through holes in a tin boom it will chafe through amazingly quickly...
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Post Options Post Options   Quote tmoore Quote  Post ReplyReply Direct Link To This Post Posted: 26 Jun 08 at 10:47pm

right ok, ill get some bolts and do it properly then.....

thanks for the advice jim, appreciated

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Post Options Post Options   Quote Granite Quote  Post ReplyReply Direct Link To This Post Posted: 27 Jun 08 at 12:31pm
For  drilling the holes you can center punch as long as your punch is sharp the only area damaged by the punch is going to be drilled away.

If you do not want to do that you can put several layers of tape on to help stop the drill bit from walking or even clamp a bit of wood in place with a hole in it.



Edited by Granite
If it doesn't break it's too heavy; if it does it wasn't built right
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Post Options Post Options   Quote tmoore Quote  Post ReplyReply Direct Link To This Post Posted: 27 Jun 08 at 12:43pm

thats a good idea, ill remember that for the future. as it happened the drilling went ok and the holes are spot on.

thanks guys

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