Pinblock Plugs

[Farrell]

The epoxy I have used, and I believe what Roger Jolly uses, is West System
epoxy - and the entire philosophy of its engineering is to bond wood. It was
originally designed for cold molding wooden boats together. West System
becomes one with the wood.

But, I like your ideas. Especially the Weldwood Plastic Resin Glue. I have
used that in many other applications in the past a like it quite a bit. It
would certainly be easier to use in this application. All the gooey epoxy
was a bit problematic for me and can easily see that the Weldwood would be
easier. There are so many very good glues out there, that sometimes I find
it easy to forget one that you haven't used for a while!

Regarding the 3/4" plugs though. I have used 1/2" plugs and found that they
often overlap the edge of a neighbor plug - although not always. I should
think that some 3/4" plugs would overlap so much on closely spaced tuning
pins that the outside edge of the overlapping plug might overlap the target
tuning pin hole location on an overlapped plug (i.e. you might get a glue
joint going right through the tuning pin hole - or possibly worse, you might
get a fair segment of glue joint edge if the tuning pin hole just grazes the
edge of the overlapping plug). I guess this perhaps should not be a
problem - maybe - never had that occur with 1/2" plugs. Does that happen,
and do you think it is a potential problem? (Am I just worrying about
something that is NO WAY a problem?) I do however like the idea that you are
getting more interconnection between plugs and thereby strengthening a
weakened pinblock.

Terry Farrell
Piano Tuning & Service
Tampa, Florida
mfarrel2@tampabay.rr.com

----- Original Message -----
From: "Joseph Garrett" <joegarrett@earthlink.net>
To: <pianotech@ptg.org>
Sent: Monday, March 12, 2001 9:26 PM
Subject: Re: pianotech-digest V2001 #330


> > ------------------------------
> >
> > Date: Mon, 12 Mar 2001 07:19:57 -0800
> > From: "Erwinpiano" <Erwinpiano@email.msn.com>
> > Subject: Fw: Pinblock Plugging;glue fit
> >
> > - ----- Original Message -----
> > From: "Farrell" <mfarrel2@tampabay.rr.com>
> > To: <pianotech@ptg.org>
> > Sent: Monday, March 12, 2001 4:29 AM
> > Subject: Pinblock Plugging; was: deep plug cutters
> >
> >
> > > Carl: How close a fit between plug and hole do you shoot for. What
kind
> of
> > > glue do you use. How do you apply. I've thought about a close fit and
> > using
> > > Titebond, but I always end up doing a looser fit and using epoxy -
just
> so
> > > that I sleep better at night. I can imagine Titebond being a lot
easier
> > > though. How do you do it? Anyone else?
> > >
> From: Joe Garrett
> If you use the "Tenon cutter" It will make a plug slightly smaller than
it's
> designated size, ie 3/4" will be more like .720" rather than .750".
> Conversely, if you use a 3/4" forstner or brad point bit to drill the
> "female" hole, it will be slightly oversized. ie. 3/4" brad point will
drill
> a hole approx. .795". Hope this clarifies that.
> As to use of glues: there are only two that are appropriate. (1) Weldwood
> Plastic Resin Glue.  (2) two part waterproof type glues, aka Resorcinols.
> Everyone should be aware that Epoxy is not an ADhesive substance, but
rather
> a COhesive substance. Unless an epoxy is specifally made for bonding WOOD,
> do not use it, for that purpose, (unless you like failures down the road).
> Hope this helps you, (an others).
> Regards, Joe Garrett-Oregon
>
>