Oops - sorry frank, another too hasty reply from work... Agreed with other poster, drill from both sides. As suggested, Good practice to score one side first anyway to prevent splintering.
> On Dec 11, 2015, at 12:23 PM, Dave Syer <syerd...@gmail.com> wrote: > > Frank - How about knocking the old sensor out and spending two minutes > enlarging the hole with a coarse half-round file? (could use a die grinder > if air nearby, or a bit from one on a cordless drill, or a drum sander ona > cordless drill, etc....) > Am I missing something? > > Dave > > > > > > > > > Message: 12 > Date: Fri, 11 Dec 2015 08:19:11 -0800 (PST) > From: svpegasu...@gmail.com <svpegasu...@gmail.com> > To: cnc-list@cnc-list.com > Subject: Re: Stus-List depth transducer replacement > Message-ID: <000f4242.2eb1832d2f8da...@gmail.com> > Content-Type: text/plain; charset="utf-8" > > > > > > > > I have drilled many a large hole that way. Works great.? > Doug MountjoysvPegasusLF38 just west of Ballard, WA. > > > > > ------ Original message------From: Eric Frank via CnC-List Date: Thu, Dec 10, > 2015 12:20To: cnc-list@cnc-list.com;Cc: Eric Frank;Subject:Stus-List depth > transducer replacement > A question about removing a depth transducer to install the new one. Based > on earlier input from the list, I have used a 2 inch hole saw from the top. > Fortunately the diameter of the old transducer is just shy of 2 in and the > new one requires a 2 in hole. So the body of the old transducer just fits > inside the hole saw, keeping it lined up with little drag (not cutting much > of the plastic body of the transducer). When the inside top of the hole saw > reached the top of the transducer, I then cut off the top half of the > transducer so I could proceed drilling down. Now the hole saw just touches > the hull, but the inside top of the hole saw hits the top of the transducer, > so I will need to saw off the next section of the transducer to proceed > further. With my tools, not so easy to saw off the transducer just above the > hull. Question: what about drilling down thru the transducer with a regular > drill bit, using the pilot hole made by the drill bit in the hole saw, and > then, using that hole as a guide, use the hole saw to proceed up from the > outside of the hull. This would avoid cutting thru more of the transducer (a > pain), and the pilot hole should guide the hole saw. Sound OK, or better to > continue from the top?Thanks as always for your input.Eric FrankCat's PawC&C > 35 Mk IIMattapoisett, MA_______________________________________________Email > address:CnC-List@cnc-list.comTo change your list preferences, including > unsubscribing -- go to the bottom of page > at:http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <http://cnc-list.com/pipermail/cnc-list_cnc-list.com/attachments/20151211/5e5aa3ea/attachment-0001.html> > > ------------------------------ > > Subject: Digest Footer
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