Removing skin fittings / through hull fittings

[nigelmercier]

How about a suitable wooden peg inserted in the hole, and a bimetal hole saw, like these: http://amzn.to/1i0kjsV

Or perhaps a pair of hole saws on an Oops Arbor: http://amzn.to/1oczQn2

 

[macd]

That's exactly how I do it. Works a treat.

 

[forelle541]

Hi
You can just get two hole saws on a normal arbor, when needs must.

 

[David2452]

How about a suitable wooden peg inserted in the hole, and a bimetal hole saw, like these: http://amzn.to/1i0kjsV

Or perhaps a pair of hole saws on an Oops Arbor: http://amzn.to/1oczQn2

As in my previous posts, I have used Oops arbors for quite some time (call them my contralube ) and find them invaluable for this and other operations like opening out holes for larger fittings, they have the advantage of allowing the correct hole saw material to be selected for the material being cut. That said, a wooden bung and accurate placement of the pilot would work just as well for your purpose.

 

[David2452]

Hi
You can just get two hole saws on a normal arbor, when needs must.

Something I have never managed as the thread and pegs are too short, unless you mean those spring steel thing like this? http://www.hall-fast.com/-hand-tools/drill-bits-holesaws/holesaw/-boa-bluespot-black-decker-holesaw/black-decker-holesaw-7-piece-set/#.UxGVIYXQtD4 but even then the smaller saw would not protrude enough to centre in the smaller hole.

 

[forelle541]

Hi
Don't forget that you can get deep and shallow hole saws. And no I don't use the spring steel things. I have used the wooden plug method and that works well too.

 

[David2452]

Hi
Don't forget that you can get deep and shallow hole saws. And no I don't use the spring steel things. I have used the wooden plug method and that works well too.

Yes, but how do you get two on a normal arbor? the thread and pegs hardly (if at all) protrude through the first one and leave no room for another. I know some arbors accommodate smaller saws up to about 25mm with a smaller thread but that would restrict the size of the smaller saw.

 

[prv]

Yes, but how do you get two on a normal arbor? the thread and pegs hardly (if at all) protrude through the first one

Must depend on the arbour. Mine has more than enough thread to accept a second saw, and the pegs are just about long enough to engage.

I've not used it like that, though, was just fiddling about.

Pete

 

[knuterikt]

How about a suitable wooden peg inserted in the hole, and a bimetal hole saw, like these: http://amzn.to/1i0kjsV

Or perhaps a pair of hole saws on an Oops Arbor: http://amzn.to/1oczQn2

I have used wooden peg several times.
One easy way to make a peg is use hole saw with inner diameter matching the old hole and cut a disc out of a 2 inch plank.
This give you peg with perfectly centered hole.
If you don't have a hole saw with matching ID you can go down a little bit and just increase the diameter of the peg with gaffer tape.
Using gaffer tape on the center bit will work nice for smaller holes.

 

[David2452]

Must depend on the arbour. Mine has more than enough thread to accept a second saw, and the pegs are just about long enough to engage.

I've not used it like that, though, was just fiddling about.

Pete

I guess it must be then Pete, mine are all Starret arbors and saws apart from the Bosch power change cobalt ones which are completely different, on that note I noticed Starret are now offering a similar system to the Bosch one.

 

[GrahamM376]

I used an angle grinder on end rather than plugging and hole saw for one of ours. Having replaced 6 of ours this winter I found if you can't get a spanner on the nut to undo the existing, then you may well need a deep box spanner to fit the new. Several of ours had a screw into the hull , hidden under antifoul, to stop them turning while the nut was fitted.

 

[Sarnia]

How about a suitable wooden peg inserted in the hole, and a bimetal hole saw, like these: http://amzn.to/1i0kjsV

Or perhaps a pair of hole saws on an Oops Arbor: http://amzn.to/1oczQn2

Thank you for the Amazon link, just what I need have ordered a kit.

I presume using the peg in the hole is for enlarging existing holes if required, rather than a method for the removal of a jammed skin fitting itself.

 

[David2452]

Thank you for the Amazon link, just what I need have ordered a kit.

I presume using the peg in the hole is for enlarging existing holes if required, rather than a method for the removal of a jammed skin fitting itself.

The plug is to centre the pilot then select a cutter of the same or slightly smaller size than the fitting shank, then cut off the flange and remove the fitting.

 

[Sailfree]

. Several of ours had a screw into the hull , hidden under antifoul, to stop them turning while the nut was fitted.

Was that the previous owner or a particular make of boat please?

Can't access my boat this weekend but trying the undo route first aided with plusgas, second undo nut enough to get in a metal cutting blade on a multi tool, Third (or poss earlier to se how easy) use a cone cutter up to 48mm and lastly try an angle grinder carefully on outside flange

 

[knuterikt]

Thank you for the Amazon link, just what I need have ordered a kit.

I presume using the peg in the hole is for enlarging existing holes if required, rather than a method for the removal of a jammed skin fitting itself.

Works for both..
A HSS Hole saw with same OD as the skin fitting centered with a wood peg give a nice smooth cut.
I prefer that method to using an angle grinder

 

[sailvayu]

Here is a video I did on removing thru hulls. i did not use the hole saw method but agree it has merit. Hope this helps someone
http://youtu.be/a9ZBrBWnNAs

 

[GrahamM376]

Was that the previous owner or a particular make of boat please?

Original Moody fit. I've heard about it being done on others as well.

 

[Sailfree]

Original Moody fit. I've heard about it being done on others as well.

Thanks will check whether Jeanneau do it as well