[pianotech] Drilling a Pin Block.

[Jon Page]

As Marcel mentioned you can drill twice but whether you do or not,
.266 is too large.   .257 (F bit) will give a nice firm torque.  .261 (G)
will give a looser feel and could be used for just the top treble section
or last octave.  Drill speed in the 900 rpm range.
-- 

Regards,

Jon Page