[pianotech] Joe Garrett's recipe for TP bushings

[Gene Nelson]

Thanks for the explaination.
Gene
----- Original Message ----- 
From: "David Love" <davidlovepianos at comcast.net>
To: <pianotech at ptg.org>
Sent: Saturday, December 06, 2008 7:35 PM
Subject: Re: [pianotech] Joe Garrett's recipe for TP bushings


> PDF is typically a type of varnish without all the driers and other
> additives, just the pure resin.  Synthetic reducer is the thinner.
> Depending on the type of resin the thinner might be xylene or mineral
> spirits.  The PDF that I use requires xylene.  The PDF lubricates the pin
> for driving it in (thus the name) and perhaps the wood fibers lining the
> hole go through a bit less stress and/or damage during that process.  When
> the pin is first driven it feels quite loose, though it doesn't slip when
> the tension is pulled up.  Once the PDF dries (about a day) the torque 
> firms
> up and the movement of the pin is very smooth and uniform.  I've used it 
> for
> several years now.  It adds a step to the process of stringing but I like
> how it eases the driving of the pin somewhat and the feel of the block
> afterwards.
>
> David Love
> www.davidlovepianos.com
>
>
> -----Original Message-----
> From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On 
> Behalf
> Of Gene Nelson
> Sent: Saturday, December 06, 2008 6:03 PM
> To: pianotech at ptg.org
> Subject: Re: [pianotech] Joe Garrett's recipe for TP bushings
>
> Sorry but I do not know what synthetic reducer or pin driving fluid is or 
> is
>
> intended for.
> Earlier, pin driving fluid was described as xylol or something like that??
> Besides making the pin drive in easier? does it have and effect on the 
> feel
> of the pin in the block? is it permanent?
> I like the feel of the pin now and really do not want to change it midway
> through stringing.
> Who uses driving fluid and why? What is the most common driving fluid?
> Has anyone ever used violin bow resin?
> Gene
> ----- Original Message ----- 
> From: "Clark Sprague" <CSPRAGUE4 at woh.rr.com>
> To: "Pianotech List" <pianotech at ptg.org>
> Sent: Saturday, December 06, 2008 3:34 PM
> Subject: [pianotech] Joe Garrett's recipe for TP bushings
>
>
>>I did some research in my saved emails, and found Joe's recipe for keeping
>>tuning pin bushings from splitting.   I hope it would be ok with Joe to
>>share it (he sent this to the list in 2006):
>>
>> On a grand I'm rebuilding the old tuning pin bushings
>> were .41 od but I am unable to find a new set that is
>> anything smaller than about .44 od.
>>
>> Would you just not put in bushings on this one, or do
>> you have a quick method of reducing the size of the
>> bigger bushings?
>>
>>
>> Just soak them in a mixture of Synthetic Reducer and pin driving fluid,
>> until they sink to the bottom of the container. This makes them very
>> pliable and also makes them impervious to splitting. Also, they will not
>> lose their "grip" on the tuning pin. Been doing it for years. Oh, mix
>> 50:1, (That's 50 parts S.R. & 1 part pindriving fluid.
>>
>>
>> Joe Garrett, R.P.T. (Oregon)
>> Captain, Tool Police
>> Squares R I
>>
>> Clark A. Sprague, RPT
>>
>
>
>