I talked to a plumber the other day and he said that they use a self feed
drill bit. He said that they worked much better than a hole saw. They
obviously cost more. And they only come in certain sizes, apparently sized
for various diameters of pipe to go through.
I need to drill some holes myself soon in inch and a half wood. I know that
Harbor Freight has a few sizes.
I may pick up one and try it out soon. The only problem is that they only
have one size I need. I may have to go elsewhere to get the other size.
I have no experience with these kinds of bits. But I don't have to drill
that many holes so a cheaper bit should work for me.
I should point out that he had a super sized drill. I am not sure how well
this would work with a small, wimpy drill. I have a large drill I picked up
years ago that I hardly ever use. It requires both hands and much of my
bodyweight to keep it under control. That should work well for my
application. Either that or a drill press should work well.
I am al;so thinking tht this may not be the smoothest cut. Since it is
designed for a utilitarian purpose by folks who don't care about pretty.