Enlarging Castor Recesses

[John Ross]

Hi Roger,
I reread your post on this one.
When I was contemplating a hole saw, I determined that I would need a 3
1/2" one, to allow for free rotation.
So for the casters I use, the double wheel ones, the 3" Forstner
wouldn't work.
A 3 1/2" Fostner must be quite awkward to work with.
On a hole saw, I was trying to figure out a dummy centre guide, with a
spring loaded hole guide to fit in the old socket hole.
Anyway I am enjoying this thread. I hadn't thought on filling the old
screw holes, but I will from now on. I had just been using new longer
screws. Except for a couple of three screw ones, I have been lucky
enough to have the old screw holes fit.
Regards,
John M. Ross
Windsor, Nova Scotia, Canada
----- Original Message -----
From: "Tom Dickson" <td_tuner@hotmail.com>
To: <pianotech@ptg.org>
Sent: Friday, December 10, 1999 10:54 PM
Subject: Re: Enlarging Castor Recesses


> 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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