Join Date: Oct 2010
Location: Dana Point, Ca
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Re: Drilling A 5/8" Hole In The Hull?
they make hole saws down to 1/2". just bought a 5/8" at home depot a few days ago. this would be the way to go. cheeper then a twist bit and cut cleaner. they also make special twist bits for plastic with 0 rake angle on the tip so it won't grab, but they are expensive what they are saying about drilling oversize is so you can make an epoxy seal on the edge of the hole so no water will get into the core. if there is a core I would cut the hole 5/8" and coat the core with epoxy to seal it. this should be fine , you are only runing wires thur it. I use a small allen wrench cut down a bit on the short end, put the long end in a drill motor and spin it in the hole to dig out some of the core and then fill the area where the core was removed with thickened epoxy. this method is better then drilling oversize hole because it leaves the two skins drilled at the correct size and is stronger
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