[pianotech] knabe knapstons

Al Guecia/Allied PianoCraft alliedpianocraft at hotmail.com
Wed Jan 19 16:03:42 MST 2011


Ron, I hope you're not crank yanking us here :-)

Nice tool!


Al -
High Point, NC



On Jan 19, 2011, at 2:56 PM, Ron Nossaman wrote:

> On 1/19/2011 1:22 PM, Chuck Vetter wrote:
> 
>> Am I crazy to create a slightly larger hole.......very slightly?
> 
> 
> Well, you're demonstrably crazy, but this probably isn't why. <G>
> 
> Joe's right that a lubricant will make the wood spongy. That, in this case, is just what you need for a friendlier fit, in my estimation. A non-liquid lubricant will limit the spongy area to the interface between capstan and wood, which is also just what you need.
> 
> Or you can heat them out, which won't leave "residoo", and refit new capstans. The new ones will likely have different threads (Murphy) so you may have to plug the holes and start from scratch. It just depends on how much time you want to spend to get a pretty job that works about like a quicker and not as pretty job. But then if you're reengineering the action and maybe moving capstans in the process, that's an answer too.
> 
> On heating out capstans; I've used a propane torch with good result. All keys out and on the bench. Three or four seconds of the capstan head held in the flame (which is NOT pointed at the key stick. Bring the key to the torch), set the key down and grab the next one. Do maybe ten at a time allowing the heat to soak in and work, then go back and crank out the capstans with your handy wire crank. Heat the next ten, etc.
> Ron N
> <capstantool 2.jpg><capstantool 1.jpg>

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