[pianotech] knabe knapstons

[Joseph Garrett]

Chuck,
Because the capstans, (knapstans?), are excessively tight, causing breakage, the need for a "....very slightly" larger hole, is definately in order. How you achieve that, without causing damage, is the big question. However, taking them out with a drill is not the way to go, IMHO. There is not much tactile perception with a drill, as opposed to a capstan "wrench", i.e. a steel rod with a point.<G> The drill would have been my last choice.<G>
Joe

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


----- Original Message ----- 
From: Chuck Vetter 
To: joegarrett at earthlink.net;pianotech at ptg.org
Sent: 1/19/2011 11:22:31 AM 
Subject: Re: [pianotech] knabe knapstons


Thanks for the encourging remarks Joe! I have carefully chucked some in a drill and slowly turned them out without breaking more...(well one actually). 
Am I crazy to create a slightly larger hole.......very slightly?
C
----- Original Message ----- 
From: Joseph Garrett 
To: pianotech 
Sent: Wednesday, January 19, 2011 1:17 PM
Subject: Re: [pianotech] knabe knapstons


I would suggest a heat gun on each one to make it expand. let cool and try again. Take the top stack off first. Try not to cremate the key wood. (damhikt!) Or...you could get a brass hammer and bash each one firmly on the top. One whack, while the key bottom is supported on a firm platform, (off of the key frame.) Either/or...possible combination of both.<G> What ever you do, don't use any lubrications. It will make the wood "spongy"! another DAMHIKT!<G> Last resort: replace all with new ones, (after extracting many that have broken!) I wish you luck.
Joe


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