Pin Driving Fluid Testing

[Farrell]

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}
> 
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