December 8th, 2011 by barry
In this procedure the pinblock has already been fitted to the plate and screw holes and tuning pin holes have been marked. The pinblock is placed on a fastener that gives it a 7-10 degree angle to the tuning pin, so the pin is pulling back. I use a 15/64 bit that is the size need for a 2/0 tuning pin. Some techs use different size bits depending on what type of pinblock material you are using. Pinblock material comes in different thicknesses and the amount of maple Lamentations. As we drill the tuning pin holes we stay aware of the correct speed of the bit traveling in the material, not to fast, not to slow. After the block is completely drilled out the block is removed from the fastener and lightly sanded and now begin fitting it into the piano.
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