[pianotech] Determining Rake (or Vertifcal Pitch)

[Joseph Garrett]

Al asked: "While I'm very pleased with my method of measuring bore angle,
I've yet to be satisfied with measuring the hammer rake. Does anyone have
an accurate and consistent way of measuring rake? Method and photo would be
greatly appreciated."
 
Al,
Using the same tool that you use to determine the existing bore angle, plus
a technique that is simple to do. On the side of the hammer, at the area of
the shank hole, put a dot with a pencil. Place a small ruler from the dot
to the tip of the moulding. Hold it firmly and draw a pencil line from the
tip of the hammer all the way to the c/l of the cove, using those two
reference points. Then get your protractor out and hold it to the shank and
align the protractor arm to the line on the hammer. Voila' you have the
Vertical Pitch. (mostly it is 0 or 1 degree. Except in geometry disasters
like the old K-52 S&S!<G>) I hope that is clear, since I don't have the
capability of a photo.
Regards,
Joe 


Joe Garrett, R.P.T.
Captain of the Tool Police
Squares R I