[pianotech] composite pinblock- Drill bit size

[Dale Erwin]

If you don't re- drill the top delignit cap.....otherwise, you won't be able to tune the piano... 
  Take a scrap and practice the pin fit and feel.  We do this on every block as double check.  I hate a too tight a block....grrrrrr!
 

 

Dale S. Erwin
www.Erwinspiano.com
Custom piano restoration
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209-577-8397
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-----Original Message-----
From: David Renaud <drjazzca at yahoo.ca>
To: Pianotech <pianotech at ptg.org>
Sent: Thu, Sep 23, 2010 7:45 am
Subject: [pianotech] composite pinblock- Drill bit size


Thanks for the advise, and yes perhaps next time I will buy or make make one as 
per the suggestions. I do have 2 more Boesendorfer blocks to do.....

   But....I have already made and fit this block, done.
   It is 3/8 delignite over 1.5 inch bolduc block.

   Was hoping on thoughts on drilling for this particular thing
actually laying in front of me. Bolduc's drill bit reads .255.
Lots of give in the maple...not so much in the 3/8 delignite top.
Perhaps a very tight collar at the top will feel good, perhaps I 
should redrill the top 3/8 with a second pass and a bit correct
for the delignite.....
  I have extra material and will make up a sample the
experiment with, but some of you have been here before and 
have opinions on this...


                                               Thanks
                                               Dave Renaud



 
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