[pianotech] Capo Bars

[Farrell]

But if brass is softer than the steel music wire, and I presume softer than 
unhardened cast iron, then isn't the steel wire going to cut a groove into 
the brass capo insert? And isn't that what we're trying to avoid?

Terry Farrell

----- Original Message ----- 
From: "Dean May" <deanmay at pianorebuilders.com>
To: <pianotech at ptg.org>
Sent: Thursday, March 05, 2009 8:43 AM
Subject: Re: [pianotech] Capo Bars


> Young Chang started doing this in the mid 90s, don't know if they still 
> do.
> They used a brass rod instead of steel. Music wire on brass is self
> lubricating.
>
> Dean
>
> Dean May             cell 812.239.3359
>
> PianoRebuilders.com   812.235.5272
>
> Terre Haute IN  47802
>
> -----Original Message-----
> From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On 
> Behalf
> Of Richard Brekne
> Sent: Thursday, March 05, 2009 4:30 AM
> To: pianotech at ptg.org
> Subject: Re: [pianotech] Capo Bars
>
> Good question... and I'm looking forward to reading the replies.  FTR,
> Bohemia pianos, a spinoff of Petrof after the splitup of Czechoslavakia
> actually did do this for a while... I'm unsure if they still do. They
> used some kind of bronze alloy I believe. Perhaps its a question of
> tooling and expense ?
>
> RicB
>
>
>    Why do manufacturers harden capo bars rather than cast (or grind)
>    the underside of the strut flat, rout out a groove to receive a
>    steel rod of proper radius, shape and hardness and insert it there
>    where it could, when it's worn, be easily changed and where the
>    consistency would be more easily controlled.  Is there a compelling
>    reason not to do it that way?
>
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