[pianotech] The REAL Spurlock Jig

[Dean May]

This is the Spurlock let off jig <http://www.spurlocktools.com/id24.htm>  I
use and am familiar with. I love it! I got way too many inconsistent results
using the wooden one Terry shows. This jig is much faster for me and a lot
more accurate. 

 

You set the let off of the end hammers of each section in the piano. For
fine regulating I like to set let off at about the thickness of the string.
Place jig under shanks as shown and adjust the height so the sample shanks
give a slight click when depressing key through let off. Then set all the
rest to get the same slight click. I then set drop by holding down the key,
adjusting drop screw until shank just starts coming off jig, then back down
to jig and about another 1/8-1/4 turn on screw. This gives a near perfect
drop of just below let-off. 

 

 

Dean

Dean May             cell 812.239.3359 

PianoRebuilders.com   812.235.5272 

Terre Haute IN  47802

 

  _____  

From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Joseph Garrett
Sent: Saturday, July 25, 2009 2:14 PM
To: pianotech
Subject: [pianotech] Spurlock Jig???

 

Terry,

"Spurlock Jig"??? Since when? That Jig has been around a heck of a lot
longer than Spurlock. Looks more like a Schaff/Tuner's Supply/Apsco/Trefz
thingee, just like the one I have that came from Trefz! Difference being,
the base was made from laminated wood that didn't warp!! However, it is a
good idea to weight it like you have. That way, you'll get better
backchecking. I use lead ingots left over from bullet casting days.<G>

Regards,

Joe

 

 

Joe Garrett, R.P.T. (Oregon)

Captain, Tool Police

Squares R I

 

 

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