Tech tip,B/R holes

[Avery Todd]

Terry,

I think he's referring to the balance rail holes. Not the mortises! Right?

Avery

At 08:10 AM 02/25/02 -0500, you wrote:
>Hi Roger. I've been using the Spurlock system for my key bushings. He has 
>a set of mortice sizing cauls that you insert into the mortices after 
>removing bushings and let the wood dry over night. These seem to work very 
>well. Are you aware of these? Are you suggesting that your method has 
>advantages over the mortice sizing cauls - or just better than not 
>addressing it?
>
>How does the method you describe size the mortice? I'm trying to envision 
>it and all I can see happening is that the bushing is getting ironed.
>
>****After finishing his first cup of coffee - Terry re-evaluates his 
>response to Roger's post.****
>
>Sorry Roger. Itis very early in the morning. I am leaving the above just 
>as an example of how easy it is to misread a post. After re-reading your 
>post for the fifth time, I see you are sizing balance rail holes - not 
>mortices! OK. Now I get it. Geeeesh! Let me grab that second cup of coffee.....
>
>Now for a pertinent question/response to your post: When you run the 
>drill-mounted balance rail pin throught the mortice and balance rail hole 
>from the top, do you make an effort to sweep the pin through the 
>front-to-back extents of the mortice so that the balance rail hole gets 
>its little needed angles to accomodate this movement when the key is 
>installed in keyframe? Or will that make it too loose - maybe induce 
>pulley key? Or do you just go through the middle of the mortice and pump 
>up and down twice (that's what I gather from you description - but it is 
>early of course - or is this post about how to level a keyframe  :-)  ???)?
>
>Thanks for the tip.
>
>Terry Farrell
>
>----- Original Message -----
>From: "jolly roger" <baldyam@sk.sympatico.ca>
>To: <"caut@ptg.org"@sktnsk01d050501116.sk.sympatico.ca>
>Cc: <pianotech@ptg.org>
>Sent: Monday, February 25, 2002 12:15 AM
>Subject: Tech tip,B/R holes
>
>
> > Greetings All.
> >                         A tip that may help those that rebush keys
> >
> > After steaming out old bushings, the balance rail hole swells to the point
> > that they are far too tight.  The following method, I have found to
> > perfectly size the balance rail hole.
> >
> > Rebush keys and leave the cauls in place for 24hrs to size the bushing 
> cloth.
> >
> > Using a new polished balance rail pin that has been polished.  Use the pin
> > in a battery operated drill,  pump twice through the mortice and balance
> > rail hole from the top side, (this ensures the hole is parallel with the
> > bushing cloth.)  just a quick burst of the switch, balance rail hole is
> > perfectly sized.  The whole set can be done to perfection in a few minutes.
> >  Takes the guess work out of where the friction problem is happening, the
> > hole or the bushing cloth.
> >
> > Hope this will help  some.
> >
> > regards Roger
> >
> > regards Roger
> >