Enlarging Castor Recesses

[John R Fortiner]

On Thu, 09 Dec 1999 19:58:49 PST "Tom Dickson" <td_tuner@hotmail.com>
writes:
> Hi, John!
> 
>   Thanks for starting this thread;  hopefully we'll both get an 
> answer.
> 
>   I have done a number of these caster jobs on older uprights.  I 
> started 
> with just a chisel, and then hit on the rotary file in my drill.  I 
> use 
> these in combination, now.  But, that's as far as I've gotten, too.
> 
>   I wondered about something like a hole saw, but it seems a little 
> flimsy 
> for the type of cutting required;
To me there is nothing flimsy about a hole saw.  The problem comes with
having a rather large hole already in the piano ( the one the stem fits
in ) and the fact that a hole saw is guided by a pilot bit that is about
1/4" in diameter.   A person would have to have something like the
bushings used to reduce that hole's size when installing stamped sockets.
  A wooden one might work for a while, but I would feel a lot better
about a metal one and just a steel rod rather than pilot bit that could
slide into the metal bushing and be free to turn in it.  ( Thinking out
loud here - not saying that this is necessarily a good method.)

John Fortiner
Billings, MT.
  also, I don't know as I can 
> easily get 
> one in the diameter I need for good clearance.  I like the chisel to 
> finish 
> as a bevel is needed rather that a straight sided cut.
> 
>   Anyway, hope the answers out there.
> 
>                                                        Tom
> 
> 
> 
> >From: John R Fortiner <pianoserv440@juno.com>
> >Reply-To: pianotech@ptg.org
> >To: pianotech@ptg.org
> >Subject: Enlarging Castor Recesses
> >Date: Thu, 9 Dec 1999 13:38:25 -0700
> >
> >What is/are your favorite methods/tool(s) for enlarging the recess 
> that
> >castors fit into on the bottom of pianos such as when fitting 
> double
> >wheel castors so the arm of the castor doesn't get hung up against 
> the
> >existing recess?
> >I've used chisels and rotary files chucked into a drill  for this - 
> bad
> >wording - I never chucked the chisels into a drill :-), but feel 
> there
> >has to be a better way.
> >
> >John Fortiner
> >Billings, MT.
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