[pianotech] Renotching-Repinning-Reusing Bridges in rebuild

William Monroe bill at a440piano.net
Thu Jan 21 08:00:57 MST 2010


Yep, got it.  I certainly didn't take it as anything but constructive.
Thanks, though for the clarification.

William R. Monroe


On Wed, Jan 20, 2010 at 9:39 PM, David Love <davidlovepianos at comcast.net>wrote:

>  Not meant as a criticism, just a comment.  I’m usually exchanging #6 pins
> for # 7 at least in the capo section on many pianos so it requires a drill
> out anyway.  Similarly, most bridges extend #7 pins down through the tenor
> and I often go up one size to #8s with predrilling to insure a tight fit.
> Also, drilling out insures I don’t have to grind down the tops of the pins.
> Maybe it doesn’t heat them up or stress them but there is a difference
> between string pressure and file or belt sander pressure, namely that the
> string applies pressure nearer the cap.  The file or belt sander applies
> pressure at the very top of the pin which can be quite a ways from the cap.
> Some flagpolling can take place which can stress the fit at the cap.  In
> general, I don’t file or sand the tops of the pins for that reason.
>
>
>
> David Love
>
> www.davidlovepianos.com
>
>
>
>
> Sure, each their own.  For the most part I guess it feels like trading one
> task for another.  Epoxy size the hole and drill out, or dip the pin and
> drive in?  Probably a wash for me.  Yes, you really do need to wear gloves
> when driving in the pins and shoe-shining the cap, but it's really a very
> localized process for me.
>
> As for stressing the pins, unless you really bear down on the pins, or sit
> in one place, there is no danger of lateral stress or overheating.
> Certainly nothing approaching what the strings themselves do, I would
> think.  I've heard the arguments, and I think it's a reasonable concern, but
> as with most things in this biz, if you use appropriate care with this
> process, there is no cause for concern.
>
> I certainly don't think my was is the only way, or the "better" way, just
> one that works for me.
>
> William R. Monroe
>
>
>
> On Wed, Jan 20, 2010 at 6:02 PM, David Love <davidlovepianos at comcast.net>
> wrote:
>
> I used to do the epoxy in the pins thing but decided there wasn’t much
> reason for having to deal with the mess.  By sizing the holes even slightly
> with epoxy and reinforcing the wood you can run a drill quickly down through
> to insure uniform depth and diameter and a clean surface.  After that,
> inserting the pins and just securing with a drop of thin CA is plenty to
> secure them.  I don’t particularly like to file or belt sand the pins as I
> think there’s no need to either heat them up or put lateral stress on what
> should be a tight fit.
>
>
>
> David Love
>
>
>
>
>



-- 
William R. Monroe, RPT
A440-William R. Monroe Piano Services, Inc.
314 E. Church St.
Belleville, WI 53508
608-215-3250
www.a440piano.net
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