[pianotech] Epoxy Filler

[Paul T Williams]

I didn't know he did that!  What fun!  We're all in this together!
P



From:
Barbara Richmond <piano57 at comcast.net>
To:
pianotech at ptg.org
Date:
01/24/2012 04:13 PM
Subject:
Re: [pianotech] Epoxy Filler



Hey, Red Green is going to be at the Peoria Civic Center.  Has anyone 
caught the one-man show?

Barbara Richmond, RPT
near Peoria, Illinois

From: "Paul T Williams" <pwilliams4 at unlnotes.unl.edu>
To: pianotech at ptg.org
Sent: Tuesday, January 24, 2012 3:27:57 PM
Subject: Re: [pianotech] Epoxy Filler

Funny , Will! I love Red-Green!  We don't get it anymore in NE.  It's in 
Seattle, though!  Nice over Christmas break to see it. 

I like the duct tape demolition ball to the old Ford Taurus, so you don't 
need a third wheel.  It actually worked! LOL 

Duct tape works for all kinds of things...including a dam.  Not Hoover or 
anything...just sayin! 

Keep yer stick on the ice, eh? 

Paul 



From: 
"Encore Pianos" <encorepianos at metrocast.net> 
To: 
<pianotech at ptg.org> 
Date: 
01/24/2012 03:20 PM 
Subject: 
Re: [pianotech] Epoxy Filler




Duct tape dams?  That calls for a highlight feature on the Red Green show!
That surfaces periodically on PBS around money begging time.  It's about a
couple of good ole boys from back, back, backwoods Maine, whose solution 
to
everything is duct tape.  They once made a wide body SUV by duct taping 
two
old Econoline vans together. 

Will

-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On 
Behalf
Of Ron Nossaman
Sent: Tuesday, January 24, 2012 3:27 PM
To: pianotech at ptg.org
Subject: [pianotech] Epoxy Filler


To whom it may concern, or anyone interested,

Yesterday, I filled a set of rib mortises out in the shop, preparatory to
routing new mortises for a new and considerably different rib set, and
installed a cutoff bar, fish, and further belly rail bracing. I used
thickened West System epoxy. In the past, I'd used maple floor (band saw 
and
sander sweepings) for a filler and thickener. It works nicely to increase
the volume of the epoxy, but I don't like how the epoxy drains out of it 
as
it sits. Adding something of a smaller particulate, like high density 
filler
or colloidal silica tends to keep the epoxy in the wood flour, but it 
seems
like a waste of materials when all I want is a cheap filler and volume
increase that doesn't separate and doesn't kill the strength  and 
toughness
of the epoxy altogether. So yesterday I tried good old non-exotic general
purpose wheat flour. I used my wood flour for bulk, and enough wheat flour
to make a peanut butter viscosity mix for bedding the cutoff bars and
bracing, and more like yogurt to pour into the mortises and plate lag 
holes
with my highly sophisticated duct tape dams. It handled beautifully, and 
the
epoxy stayed suspended in the filler with no indication of it settling 
out.

When I leveled everything this morning, I was very pleased with the 
texture
of the cured mix. It's less brittle than straight epoxy, but still quite
tough, and works as well as anything I've tried, better than most, and
cheaper than almost anything.

If you have a need, I recommend you give it a try. Self rising? You're on
your own.

Ron N





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