Attaching fittings to an aluminium mast

> 10 years ago
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FreeRadical
FreeRadical
WA
855 posts
WA, 855 posts
19 Jan 2016 4:10pm
Would method do you use? Drill and tap? Rivet?

What kind of rivet? Aluminium? Monel? SS?

What do you use for anti corrosion? Duralac?

Would you put a nylon type spacer etc between Stainless masthead light (steaming light) bracket and mast?


patrigo28
patrigo28
35 posts
35 posts
19 Jan 2016 7:33pm
Last year I discovered Rivnuts after my genoa ripped part of my whisker pole track off the mast. Rivets or screws are okay for small stuff but a Rivnut gives you a substantial bolt in to a substantial nut inside the mast. If you haven't met them yet, Google it.
Jode5
Jode5
QLD
853 posts
QLD, 853 posts
19 Jan 2016 10:15pm
Yor can rivet or tap, but I prefer tapping. When the rigger fitted my new furling boom they drilled and tapped all the fittings including the goosenecks for the boom and kicker which supports a 250kg 7mt boom.

You can use Duralac or Tefgel which is not as messy as Duralec.

With rivets I always use Monel, but remember to use Duralec or Tefgel.

With the steaming light just use Tefgel.
FreeRadical
FreeRadical
WA
855 posts
WA, 855 posts
19 Jan 2016 9:40pm
Thanks guys, I'll check out rivnuts and cheers Jode5, always appreciate your view. Do you think a nylon type spacer (washer) is needed to separate the SS plate (mount) against the mast? Not sure about too much Duralac etc apart from the screw/rivet?


HG02
HG02
VIC
5814 posts
VIC, 5814 posts
20 Jan 2016 5:08am
patrigo28 said..
Last year I discovered Rivnuts after my genoa ripped part of my whisker pole track off the mast. Rivets or screws are okay for small stuff but a Rivnut gives you a substantial bolt in to a substantial nut inside the mast. If you haven't met them yet, Google it.


I use these ( Nutcerts) at work and have thought of using them also on my mast but had not heard of any one using them so have not yet but Ill do some more research. The only problem I can see if the screw and nut cert being use corrode over time ,seize and there might be a difficulty removing the screw at a later stage. (Years later) as the nut cert will turn in the mast. But I guess you can drill the screw out and also the nut cert head to release the nut cert




slammin
slammin
QLD
998 posts
QLD, 998 posts
20 Jan 2016 5:59am
9.5m mast so monel or alloy rivets depending on the strength required and duralac.
Datawiz
Datawiz
VIC
605 posts
VIC, 605 posts
20 Jan 2016 7:08am
FreeRadical said..
Would method do you use? Drill and tap? Rivet?
Drill & Tap

What kind of rivet? Aluminium? Monel? SS?
SS Screws

What do you use for anti corrosion? Duralac?
Tefgel

Would you put a nylon type spacer etc between Stainless masthead light (steaming light) bracket and mast?
Yes




regards,
allan
Datawiz
Datawiz
VIC
605 posts
VIC, 605 posts
20 Jan 2016 7:15am
HG02 said..

patrigo28 said..
Last year I discovered Rivnuts after my genoa ripped part of my whisker pole track off the mast. Rivets or screws are okay for small stuff but a Rivnut gives you a substantial bolt in to a substantial nut inside the mast. If you haven't met them yet, Google it.



I use these ( Nutcerts) at work and have thought of using them also on my mast but had not heard of any one using them so have not yet but Ill do some more research. The only problem I can see if the screw and nut cert being use corrode over time ,seize and there might be a difficulty removing the screw at a later stage. (Years later) as the nut cert will turn in the mast. But I guess you can drill the screw out and also the nut cert head to release the nut cert





I've used these extensively in another life and they are quite good. The rivnut tool, however, was very expensive and it's difficult to do a reliable job without it.
Take your point about removing them HG.
Personally, I'll continue drill & tap, SS screws with Tefgel...
regards,
allan
Trek
Trek
NSW
1208 posts
NSW, 1208 posts
20 Jan 2016 10:07am
I wa always reluctant to put holes in my mast, aside from weakening it whatever gets put there is a snag point for something inside. A few times I made up a 3mm alumniym band to attach things. Like a big hose clamp. Has advantage you can adjust the position too.
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