Odd pin block

[Erwinspiano at aol.com]

Hi ROn
  What's the decimal equivalent of 6.8mm.  I find  that a letter f .257 is a 
bit too tight for the block you are describing.   .261 seems better in CA 
climate. I hate tight tuning blocks. A tight block in a  piano makes for it to be 
more likely to be more out of tune more of it's  life. JMHO 
  You Know?
  Dale:

> All  the 1/4" holes first, then all the 6.8mm. Just one bit change between 
>  passes. It has always been my impression that it would be difficult not to 
 
> center the second pass. I drill in the piano, with my hovercraft  drill 
> press setup, and the second pass seems to center pretty much  automatically 
> with a regular jobber bit. Maybe there's a potential  problem I'm not aware 
> of here. What sort of drilling rig and  procedure do you use?
> Ron N
> 


 



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