Tuning Pin Angles

[Newton Hunt]

Pinblocks need to be bored at whatever angle is derived so that the string is
at 90 degrees to the tuning pin when the bottom coil is 1/8" from the plate and
rests on the first bearing bar.  A simple guage can be made from some junk
metal, or old tuning pin with the top cut off and a straight piece of wire
soldered or glued into the hole which is 1/8" from hole to top.  Invert the pia
and measure the angle of the pin to block or plate when the wire rests on the
bearing bar in the treble.

This angle prevents the wire from climbing down the pin if the angle is too
great and from trying to crawl up the coil above if the angle is too low.

Tuning pins should then be driven down so the bottom coil, when tight and
leveled is 1/8" from the plate.  Never higher, rarely lower.

      Newton
      nhunt@rci.rutgers.edu