Enlarging Castor Recesses

[Tom Dickson]

Roger,

  I saw your post shortly after I posted my second one.  Thsnks for the 
forsner idea - I appreciate your input.  I'll be looking at that soon.

  Hope all went well on your trip south after seeing us.

                                                       Sincerely,
                                                           Tom


  P.S.  My son, Ian, was quite impressed (he's a salesman, too).


>From: Roger Jolly <baldyam@sk.sympatico.ca>
>Reply-To: pianotech@ptg.org
>To: pianotech@ptg.org
>Subject: Re: Enlarging Castor Recesses
>Date: Thu, 09 Dec 1999 23:42:11 -0600
>
>Hi Tom,
>            Nice to see you in Regina last week.
>  I use a 3" dia forsner bit, they are availiable from Lee Valley Tools in
>Edmonton. You will need a 3/4" drill heavy duty and slow speed to get the
>job done.
>Take a 3/4" piece of board and drill a hole right thro' it with the bit.
>Use 2 nails to tack the home made template over the hole, the board will
>act as a guide and stop the drill jumping all over the place.
>It is important to measure the distance from the bottom of the mounting
>plate to the bottom of the wheels of both the old and new casters, to
>ensure that pedal height is correct.
>You will need some kind of depth gauge to make any corrections in depth.
>Drill out the old screw holes and plug them with maple dowel and epoxy, do
>not use them for the new screw holes, you will get better holding strength
>with fresh holes into side grain.
>The reason for plugging the holes is to make sure there is lots of solid
>material supporting the shaft. The pressure in this area can be several
>hundred pounds per square inch.
>The other important thing to watch is shaft hole diameter, bore out the old
>holes and use the maple sleeves, availiable from Pianophile.  Glue them in
>for a long lasting tight fit.
>Screw the new casters on with 2" # 8 screws.
>You may have to trim some material off the corners of some trap work boards
>to obtain clearance of swivel.
>Regards Roger
>
>
>
>At 07:58 PM 09/12/99 -0800, you wrote:
> >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;  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.
> >>___________________________________________________________________
> >>Why pay more to get Web access?
> >>Try Juno for FREE -- then it's just $9.95/month if you act NOW!
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> >
> >______________________________________________________
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> >
>Roger Jolly
>Saskatoon, Canada.
>306-665-0213
>Fax 652-0505

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