There is a third way. Similar to your second. Take a piece of 3/4" plywood and cut the size of hole you want with your hole saw. Next take this template and hot glue or clamp it where you want to enlarge the hole.
Mike ---------- Forwarded message ---------- From: Dennis C. <capt...@gmail.com> Date: Tue, Apr 1, 2014 at 8:33 AM Subject: Stus-List Enlarging existing holes To: CnClist <CnC-List@cnc-list.com> Over the years, we've discussed enlarging existing holes in hulls or decks. With a large existing hole, the pilot bit in a hole saw has nothing to center itself with. There are two decent ways to do that. First, you can use two hole saws on one arbor (mandrel) if the arbor has enough threads to allow that. If the smaller saw isn't quite large enough, you can wrap some tape around it to make it fit the existing hole. Second, you can make a wood insert to plug the existing hole. There are several ways to do that. If you have a tapered plug, drive it into the hole and cut it off. Or, cut a wooden disc and insert it into the hole or spear it on the pilot bit. If necessary, you can shape the disc with a spindle or belt sander. Dennis C. Touche' 35-1 #83 Mandeville, LA _______________________________________________ This List is provided by the C&C Photo Album http://www.cncphotoalbum.com CnC-List@cnc-list.com -- Mike S/V Persuasion C&C 37 K/CB
_______________________________________________ This List is provided by the C&C Photo Album http://www.cncphotoalbum.com CnC-List@cnc-list.com
