[pianotech] Determining Rake (or Vertifcal Pitch)

[Al Guecia/Allied PianoCraft]

Thanks Joe. Very clear. I guess I'm concerned about the fact that the shank is tapered and weather I should use the top or center of the shank when measuring. I guess I'm splitting hairs here and you have way more than 1º movement between the shank and hole in the hammer when you're glueing up. Oh well, I've been called anal before.

Al -
High Point, NC


PS, Considering your vast knowledge base (I'm not joking here), you should work on your photo capabilities. :-), (joke). It does come in handy.


On Sep 3, 2011, at 5:42 PM, Joseph Garrett wrote:

> 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
> 
> 

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