There’s also a tool for this (within a certain range). I bought one a few years ago.
From: Dennis C. via CnC-List <cnc-list@cnc-list.com> Sent: Monday, February 20, 2023 2:47 PM To: Stus-List <cnc-list@cnc-list.com> Cc: Dennis C. <capt...@gmail.com> Subject: Stus-List Re: Removing datamarine speed transducer C&C 29 mk2 Sometimes, if you're lucky, you can install two hole saws on the same mandrel. One the size of the existing hole as a guide and a second one the size of the hole you want to drill. Otherwise, use Chuck's method. -- Dennis C. Touche' 35-1 #83 Mandeville, LA On Mon, Feb 20, 2023 at 11:38 AM CHARLES SCHEAFFER via CnC-List <cnc-list@cnc-list.com <mailto:cnc-list@cnc-list.com> > wrote: The tricky part for me was caused by the newer sleeves being a size larger, so a friend gave me a tip. You find a holesaw the same size as the exiting hole and drill through some wood to make a pilot guide the same size as the hole you want to enlarge. Then you put the wood plug you made onto the pilot bit of the larger holesaw pilot bit, and it will keep the bigger holesaw centered and Bob's Your Uncle, you're all set. Good luck. Let us know how you make out. Chuck Scheaffer 1989 C&C 34R, Annapolis
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