making key bushing cauls

David M. Porritt dporritt@mail.smu.edu
Mon, 15 Nov 2004 12:02:21 -0600


Ron:

If you ever decide to buy a Buchmaster, let me know.  I have one that I used once (one bushing, not one key set) and I'd make you a deal on it.

dave


__________________________________________
David M. Porritt, RPT
Meadows School of the Arts
Southern Methodist University
Dallas, TX 75275
dporritt@mail.smu.edu


----- Original message ---------------------------------------->
From: Ron Nossaman <rnossaman@cox.net>
To: Pianotech <pianotech@ptg.org>
Received: Mon, 15 Nov 2004 11:49:40 -0600
Subject: RE: making key bushing cauls


>>I'd like to see a side-by-side trial of the "Bushmaster" method and the
>>Spurlock system. I use the Spurlock system and love it, but I have never
>>tried the other. Anyone used both? Opinions? I recall can't imagine anything
>>slicker than the Spurlock system.
>>
>>Terry Farrell
>>
>>I've used both and have come up with a hybrid system: I use the Spurlock
>>system with hot hide glue, but with brass cauls.  The thickest brass caul is
>>used to hold the first bushing in place, the required size is used for the
>>other side.  Then I place a clothes iron (set on cotton) on top of the final
>>cauls.  This reactivates the hide glue, sizes the bushing hole in the key
>>and sets the cloth bushing to the caul.  Let stand over night. The key hole
>>sizing step is eliminated, as well as any easing.  Steaming the old bushings
>>out will also size the balance rail.
>>
>>Paul C

>In the late 70's, I made a tool that works somewhat like the Bushmaster, 
>copied from an existing tool someone had that originally came from who 
>knows where. Both of these tools lacked a means of indexing the depth of 
>the cloth, so my copy didn't work too well. For years, I used hide glue, 
>cauls, and two pieces of appropriate thickness cloth, inserted into the 
>mortise, caul inserted, and trimmed flush with the caul with a knife. This 
>worked, ok, with near zero waste of bushing cloth, but was hard to gage the 
>depth of the bushing in the mortise. Lately, I've used my old homemade 
>tool, re-modified with ears to index the cloth to proper depth (like the 
>Bushmaster). It's quick and wastes three times as much bushing cloth as is 
>glued in the keys. Unnecessary waste offends me, but the uniformity of the 
>job is just what I was after, so that's where I currently am.

>I suppose if I did key bushings on a weekly basis I might be doing it 
>differently, since it always seems to take me half a set to get comfortable 
>with it and in rhythm, this is easy and mindless enough a system for me to 
>run it. When I get tired of looking at my funky little tool, or it finally 
>falls apart and dies, I'll probably buy a Bushmaster.

>So how do you Spurlock method bushers index cloth depth, and are you happy 
>with the result?

>Ron N

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