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Re: Drilling A 5/8" Hole In The Hull?
I don't understand why you can't just use a 5/8" twist bit ...
I'm concerned about tear-out on the inside, and I don't believe I can get a drill in there to relieve the inside outer edge, first.
Forstner bits are for drilling flat bottom holes and auger bits are much less stable than a standard twist bit.
These things I know. But, sometimes, tools can be used in ways other than that for which they were intended.
But, I'm not an expert in drilling holes in boats, just wood.
I'm not an expert in drilling holes in either, but I do know this: Fibreglass is "chippy," or "flaky." For anything other than very small holes, it can be difficult to drill cleanly.