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! > > >>Get your free software today: http://dl.www.juno.com/dynoget/tagj. > > > > > >______________________________________________________ > > >Get Your Private, Free Email at http://www.hotmail.com > > > > >Roger Jolly > >Saskatoon, Canada. > >306-665-0213 > >Fax 652-0505 > > ______________________________________________________ > Get Your Private, Free Email at http://www.hotmail.com >
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