[pianotech] Pinblock Separation

Joseph Garrett joegarrett at earthlink.net
Sat Jan 12 17:31:37 MST 2013


Paul said:
"I used large washers in the back, but found the wood still crushed fairly
considerably. It occurred to me at the time that I may want to glue on a
1/4" strip of maple or a hardwood plywood next time. Thoughts?
 
Paul,
On a few 3/4 plate pianos, with that malady, I've installed a 1/4" steel
plate on the back to make sure that there was something substantial to
anchor the bolts to and add support to the "free-floating pinblock". Works
really well. I make the plate, (or, rather, I have my metal working/welder
friend make), full width and the width of the pinblock area. That way I've
got the thing screwed to the back of the piano and then drill through for
the carriage bolts. Once that's done, I enlarge the holes in the metal to
accomodate the square part of the carriage bolts. The metal plate gets
painted black to match the back assembly. It works well for me. YMMV
Oh, I use thick Fender Washers or recycled plate washers in the front. I
also add more bolts than the original screw pattern to get an even
bolt/support pattern. 
Joe


Joe Garrett, R.P.T.
Captain of the Tool Police
Squares R I



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