Subject: RE: Machine Threads in Pinblock, was WD-40, now plate screws! Date: Thu, 19 Jun 2008 11:29:25 -0400 Message-ID: <154501c8d221$4197cbc0$6600a8c0 at athlonx2> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Mailer: Microsoft Office Outlook 11 Thread-Index: AcjRQBDMGcRhH1sWSXCAfOn9HmxRAgA4SAUQ In-Reply-To: <4858FFEE.1000208 at cox.net> X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3198 >>MSC has them at $91.56 per hundred. Who is MSC? Dean Dean May cell 812.239.3359 PianoRebuilders.com 812.235.5272 Terre Haute IN 47802 -----Original Message----- From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of Ron Nossaman Sent: Wednesday, June 18, 2008 8:31 AM To: Pianotech List Subject: Re: Machine Threads in Pinblock, was WD-40, now plate screws! > This is ever so slightly off topic at hand, but I'll run with it > anyway. I'm going to be using the 3/8" x 16 thread x 4" long socket set > screws for plate screws as you, Ron, Del, and others are doing. What > size drill bit are you using to drill the hole in the rim? (or drill the > plugs glued in the holes, as it were). Are you tapping afterwards? > What size tap if so? Holes filled with epoxy/wood flour, drilled 5/16", no tapping. I've tried "tapping" by running a 3/16x16 rod in and out before the bolts go in, but it eats the threads off grade 2 all thread pretty quickly. A sacrificial set screw, or long grade 8 bolt will work, or just run each bolt straight into the hole, mostly out, and in again. Leaves them tight but movable. > I was able to get these screws, acorn nuts, etc at my local /Fastenal. > / One inch round brass stock as well for mass loading. I mention this > for others, as there are supposedly 4000 of these stores in the > U. S., so you may just be able to run down the street instead of mail > ordering. Lots of other stuff there that us weird piano rebuilders > might use or adapt, and they have a huge catalog. Looks like $3.96 each at Fastenal. MSC has them at $91.56 per hundred. If you plan on doing more than one, less than 1/4 the price is worth mail order. I'll be ordering another box soon. Now if I could just find some neat looking cap nuts at a similar price. FWIW, I think standard acorn nuts are fairly ugly, and everything I've seen so far that wasn't has been over $4 each. > Also, these 3/8" screws miked out at .369 instead of the .375 that 3/8" > works out to. Does that differ from your stock? I get 0.371". Plenty close enough for me. Ron N
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