Any size Greenlee over 1" should be fine, longer shank preferred. Drill
press same thing, it will need a 1/2" chuck unless the bit is turned
down. Longer quill stroke is better, but you can put a block under the
piece if it don't go down far enough in one stroke. Pretty basic stuff,
just trying to save you from buying a lathe if you really don't have to.
You can use a large bit in a hand-held drill also, but even with the
center spur, they tnd to walk anyway. When ou drill one hole, space the
next one so that there is plenty of wood surrounding the center spur,
leaving a series of scallops around the perimeter.