Re: [CR]Spectrum frame and brazing

(Example: Events)

Date: Fri, 23 Sep 2005 11:15:19 -0700
From: "Kurt Sperry" <>
To: "" <>
Subject: Re: [CR]Spectrum frame and brazing
In-Reply-To: <>
References: <>

Better in what empirical, quantifiable as opposed to theoretical sense? I understand the theoretical advantages of silver brazing. Is there any measurable or demonstrable objective difference between brass brazed and silver brazed framesets all else equal? Kurt Sperry Bellingham WA

On 9/23/05, <> wrote:
> Dale,
> Silver brazing of frame tubes is clearly better for the tubing. The fact
> that brass brazeing doesn't actually distroy the frame is a non-issue in my
> mind. The only people building custom frames with brass are the ones who
> experienced difficulties with silver from improper use early on in their
> experience, and instead of figureing out how to use it decided to use bra ss
> because it does not require the same amount of care and attention in the
> cleaning and assembly process. That is why factory built bikes are brazed
> with brass; they don't want to take the time to clean and fit the parts m ore
> precisely.
> Sure, brass works. Silver is better.
> Brian Baylis
> La Mesa, CA
> Debate? I don't think so.
> -- wrote:
> In a message dated 9/22/2005 11:13:52 PM Eastern Daylight Time,
> writes:
> << I might be mistaken but it looks as though Tom Kellog use both silver
> and
> bronze brazing rods on this frame. The rear dropout areas appear to be
> attached using bronze rod (which "fills" better) whereas most of the othe r
> joints
> appear to have been
> done with silver rod. Is that truly the case? >>
> Sure!
> Virtually all modern USA custom builders have done that.. the brass fills
> the
> big voids at the drop out ends and, the theory goes, is less of a heat
> issue
> there cause the parts are so chunky.
> Silver is used the rest of the joints because the gaps are so close and
> you
> have thin stuff to deal with which, the theory continues, would be
> otherwise be
> damaged by the higher heat that brass requires.
> As you may infer from my phraseology, some pooh pooh all that heat build
> up
> stuff and point to the Euro builders who have built a zillion bikes with
> brass
> and suffer relatively no failures due to apparent overheating. The debate
> rages on.....
> Dale Brown
> Greensboro, NC USA
> _______________________________________________
> _______________________________________________