> I was thinking two drilled holes and a chisel to even the sides.
That would make a hole, yes, but I don't think it would make a perfectly accurate one. I have envisioned a jig to reproduce exact size holes - don't know how well it would work in use though (my imagination often seems to be jig-compromised).
Below I have tried to draw the jig. Basically make a solid picture frame with three sides - open in the middle of course. The fourth side, on the left below, is loose, but snug fitting - that side can be moved left and right to adjust to the size of the blank that you use for a slab of buttons. The button wood set into the center (it must be squared well) - it will be short of the top/bottom by the length of the center pin slot opening. Then set an appropriate sized piece of something (the thickness of your center pin plus enough for the bushing cloth) between the right edge of the button blank and the inside of the right hand picture frame. Snug the movable left side up to the button blank & clamp/secure in place. Now the button blank can move left-right and top-bottom just the exact size of the button mortise. Now set this apparatus over a small (like 1/8th inch) straight router bit (drill a hole first if you wish), secure into position, and move the button blank to the extremes of the picture frame opening and you, theoretically, will have a perfect center rail pin bushing mortise.
________________________________________
|
__________________________________ |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
__________________________________| |
|
________________________________________|
Anyone have a better idea?
Terry Farrell
----- Original Message -----
From: "John Ross" <jrpiano@win.eastlink.ca>
To: "Pianotech" <pianotech@ptg.org>
Sent: Monday, April 28, 2003 7:22 AM
Subject: Re: Key Button Replacement
> Hi Terry,
> I also, could not find any information on the cutting of that hole. I
> thought I read the second part, and it was not in there. But now I can't
> find my April issue either.
> I queried this recently on this list, and only got one reply, I think from
> Bill Ballard. He just commented on what he thought the method might have
> been.
> Hopefully, this second query will result in the definitive answer.
> I was thinking two drilled holes and a chisel to even the sides. But I don't
> think that is it.
> Regards,
> John M. Ross
> Windsor, Nova Scotia, Canada
> jrpiano@win.eastlink.ca
> ----- Original Message -----
> From: "Farrell" <mfarrel2@tampabay.rr.com>
> To: <pianotech@ptg.org>
> Sent: Monday, April 28, 2003 7:28 AM
> Subject: Key Button Replacement
>
>
> > I read John Hartman's March 2001 article on key button replacement. It
> does not appear that the article addresses how to accurately cut the oblong
> hole for the center rail pin. How do you do that?
> >
> > I have searched high and low and cannot find the April 2001 issue that has
> the second half of the key button article. Does anyone have it that would be
> willing to scan it and email it to me? I would be forever grateful!
> >
> > Terry Farrell
> >
> > _______________________________________________
> > pianotech list info: https://www.moypiano.com/resources/#archives
> >
>
>
> _______________________________________________
> pianotech list info: https://www.moypiano.com/resources/#archives
This PTG archive page provided courtesy of Moy Piano Service, LLC