Return-Path: Received: from dskfw1.funb.com ([168.175.254.61]) by ns1.olsusa.com (Post.Office MTA v3.5.3 release 223 ID# 0-70783U4500L450S0V35) with ESMTP id com for ; Fri, 16 Feb 2001 09:48:34 -0500 Received: (from uucp@localhost) by dskfw1.funb.com (8.8.5/8.8.5) id JAA08403 for ; Fri, 16 Feb 2001 09:57:16 -0500 (EST) Received: from clt-msw-01.funb.com(168.175.76.103) by dskfw1.funb.com via smap (V2.0) id xma007697; Fri, 16 Feb 01 09:55:47 -0500 Received: from cltastr02.capmark.funb.com (unverified) by clt-msw-01.capmark.funb.com (Content Technologies SMTPRS 4.1.5) with ESMTP id for ; Fri, 16 Feb 2001 09:55:41 -0500 Received: from clt-conn-01.capmark.funb.com (unverified) by cltastr02.capmark.funb.com (Content Technologies SMTPRS 2.0.15) with ESMTP id for ; Fri, 16 Feb 2001 09:59:13 -0500 Received: by clt-conn-01.capmark.funb.com with Internet Mail Service (5.5.2650.21) id <1YC71QZ2>; Fri, 16 Feb 2001 09:54:44 -0500 Message-Id: From: "Hapgood, Matt" To: "'lancair.list@olsusa.com'" Subject: RE: Holes in Firewall Stainless Date: Fri, 16 Feb 2001 09:54:30 -0500 X-Mailing-List: lancair.list@olsusa.com Reply-To: lancair.list@olsusa.com Mime-Version: 1.0 <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> First Union Securities, Inc. Rob - I have a couple of thoughts for this - 1. I have been able to use hole saws to drill through the stainless firewall. I bought a few GOOD holesaws and they work quite well. I too tried sanding drums and carbide dremel bits - none worked well. 2. Rather than boring out the stainless, I "thinned" the plywood firewall on the passenger side. This allows retaining the full amount of stainless and still fit a nut on the fittings. I figured out what I considered to be a rather ingenious way of thinning the plywood: Take a hole saw and drill a small circle into the plywood from the passenger side - not very deep, but through the glass and a little into the plywood. Then take a sanding disk - the 3M type that with the plastic fitting that screws into a receptacle. Round out the screw part, trim the 3M disk diameter so that it is exactly the same diameter as the socket you need. Then chuck the sanding disk into an air tool grinder and it will sand a nice, smooth indention into the firewall. I have several sanding disks that I trimmed to the sizes I wanted. If you are a big spender, you could have the plastic/metal receptacle part also trimmed to size - I just didn't want to waste the receiver... Matt ________________ > Any suggestions for cutting big holes in the 0.023 inch stainless will be > gratefully appreciated. My hole saw wouldn't even scratch the stainless. > > Pretty soon I'll need to cut a hole for the cabin heat valve. > >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> LML website: http://www.olsusa.com/Users/Mkaye/maillist.html LML Builders' Bookstore: http://www.buildersbooks.com/lancair Please send your photos and drawings to marvkaye@olsusa.com. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>