Why are you using a "pin driving fluid"? Did you try without it? Terry Farrell ----- Original Message ----- From: "Joseph Garrett" <joegarrett@earthlink.net> To: <pianotech@ptg.org> Sent: Tuesday, July 08, 2003 4:56 PM Subject: Pin Driving Fluid Testing > All, > I've been on a quest to find an appropriate Pin Driving Fluid. The stuff I > have been using for many years, came from Rodda Paint. The recently > discontinued stocking it! So, the "quest". > I've been doing some testing of "Phenolic Resins", from various suppliers. > The most recent tests are really weird. Using a piece of Delignet Pin Block > Material, 2/0 tuning pins and various drill sizes, (my usual drill size for > Delignet is 6.8mm). Here's the results, of the most recent tests: > Material: Delignet Tuning Pin: 2/0, (.282" exact) Drilling Speed: 700 rpm > (air cooled) > Initial reading: 115 inch pounds > After 24 hours: 80 inch pounds > After 48 hours: 75 inch pounds > After 2 weeks: 150 inch pounds!!!!!! > I must say that Shop Temp/Humidity have been constant. (Yes, I do have > gauges to verify that!) > Something strange is afoot! > Any thoughts? (of course you do! Silly me!<G> > Best Regards, > Joe Garrett, RPT, (Oregon) > > Been There, Didn't Like It, So I'm Here To Stay! [G} > > _______________________________________________ > pianotech list info: https://www.moypiano.com/resources/#archives
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