Thanks to all for their thoughts on my key bushing mortise dilemma. I took my router, set it up on a couple blocks, slide the up-side-down key under router and rout out the area by eye. I'd be curious how someone has made a jig to center the grinding on the mortise. For this job, the eye method will be fine. One thing I have found and had not seen mentioned by anyone when doing bushings ala Spurlock method: When I have used Bill Spurlock's razor knife, I find it works OK, but does tend to pull the bushing a bit out of position. I tried my rotary felt cutter (from Pianotek) and it works awsome. Cuts the felt right where you want it and does not move it a bit. Terry Farrell ----- Original Message ----- From: "Murray Seminuk" <seminukm@cadvision.com> To: <pianotech@ptg.org> Sent: Friday, January 11, 2002 5:00 PM Subject: Re: Key Bushing Mortises > Hi Terry > Terry I have a jig to router mortises much like the way Yamaha keys are > done.Straight across the whole keybottom.You only have to remove enough wood > to accomodate the compressed cloth .Make sure the mortise is centred and > the same width as the cauls that you are using.In doing this the cloth will > not have an effect on the touch of the instrument. > > Murray > ----- Original Message ----- > From: "Farrell" <mfarrel2@tampabay.rr.com> > To: <pianotech@ptg.org> > Sent: Friday, January 11, 2002 10:55 AM > Subject: Key Bushing Mortises > > > > I am rebushing keys from an older spinet. The mortises on the front rail > do > > not have regular little recessed areas on each side of the mortise for the > > little flap of bushing cloth that is typically left over the edge (on a > > plane with the bottom of the key). All other keys I have rebushed or have > > had rebushed had a nice little recessed area next to the mortise to > > accommodate the left over flap. The old bushings from these keys had the > > little flap, but the flaps were irregular in that some were partly > submerged > > in a crude recess, some were not submerged and stuck out below the bottom > of > > the key, etc., i.e. a real mess. My experience with this arrangement is > that > > it is difficult to get nice consistent dip with an irregular bottom to the > > key. > > > > So, what to do. If this were my piano for life, I would rout out or chisel > > out the proper recess. This is not my piano, but I do want to have flat > key > > bottoms. Can I cut the bushings at the key bottom and not have any flap - > > much like many center rail bushings are cut? That would certainly be the > > easiest solution, assuming I would get proper performance (I don't see why > > this would not work - or is it too easy to damage the bushing when setting > > the key onto the pin?). If that is not a good idea, can someone suggest > the > > easiest method of making the little recess - I prefer not to make a career > > out of this set of keys, but I do want to do a decent job. Thanks for any > > ideas. > > > > Terry Farrell > > > > > > > >
This PTG archive page provided courtesy of Moy Piano Service, LLC