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Reply to "Thunder Ranch build thread"

I have found that hole saw wobble can be significantly reduced by drilling the pilot hole first and separately. Then installing a piece of 1/4 inch drill rod (or almost any plain steel 1/4" steel rod) in the hole saw. There are chip removal flutes that are on a regular hole saw pilot bit. Those chip removal flutes are what cuts the pilot hole larger as you are drilling due to side thrust. There's a lot of that on a large hole saw ! Even then, I think you still get a crude, rough hole, so I always go one size smaller and finish with a half round fine file or a cylindrical drum sander. Especially when the finished product is a show piece. I have pretty much found that hole saws always give you a larger hole that what the size is  that's stamped on it ..............Bruce

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