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Main
Date: 02 Oct 2007 22:33:20
From: travis.harry@gmail.com
Subject: Alternative size headset bearings
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Can a set of slightly oversized or undersized uncaged ball bearings be
substituted for the expected size in a threaded heaset? I'm looking
for a temporary or maybe even longer term solution to pitting confined
to the very narrow raceway of the existing balls. I can't visualize
whether the larger or smaller balls might spend all of their time on a
fresh raceway.
I'll ask the same question about a bottom bracket with separate cups
and axle, too, except that the performance in this location is
completely unlike what the balls are doing the headset.
Harry
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Date: 04 Oct 2007 01:29:54
From: datakoll
Subject: Re: Alternative size headset bearings
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"If there's visible damage, remove the lower cup and press it back
again.
That will necessarily cause the dimples on crown race and cup to be
misaligned which gives you a half-season to find a new headset."
also possible: the new positions following a repack, new bearings and
lube, fail completely into an elliptical position where before the
bearing surfaces was adequately round and perpendicular. The new
elliptic then forces the adjustment, even if held with red locktite
and possible welding, into a radically too loose headset assembly.
Cure? new headset, new crown race.
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Date: 03 Oct 2007 14:22:29
From: A Muzi
Subject: Re: Alternative size headset bearings
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travis.harry@gmail.com wrote:
> Can a set of slightly oversized or undersized uncaged ball bearings be
> substituted for the expected size in a threaded heaset? I'm looking
> for a temporary or maybe even longer term solution to pitting confined
> to the very narrow raceway of the existing balls. I can't visualize
> whether the larger or smaller balls might spend all of their time on a
> fresh raceway.
>
> I'll ask the same question about a bottom bracket with separate cups
> and axle, too, except that the performance in this location is
> completely unlike what the balls are doing the headset.
>
> Harry
>
Quite perspicacious of you. Yes the wear is very different. Headsets here:
http://draco.acs.uci.edu/rbfaq/FAQ/8f.13.html
Yes, use the same size balls but do not overfill the race. 1 short will
run fine, 1 extra botches everything fast. Don't use the wrong size
retainer.
If there's visible damage, remove the lower cup and press it back again.
That will necessarily cause the dimples on crown race and cup to be
misaligned which gives you a half-season to find a new headset.
--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971
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Date: 03 Oct 2007 13:06:59
From: datakoll
Subject: Re: Alternative size headset bearings
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try Castrol Marine grease at walMart. It's beige, very slippery but
viscous - good for bearing and pit use. Not GP but bearing comfy.
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Date: 03 Oct 2007 05:53:05
From: Qui si parla Campagnolo-www.vecchios.com
Subject: Re: Alternative size headset bearings
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On Oct 2, 11:33 pm, "travis.ha...@gmail.com" <travis.ha...@gmail.com >
wrote:
> Can a set of slightly oversized or undersized uncaged ball bearings be
> substituted for the expected size in a threaded heaset? I'm looking
> for a temporary or maybe even longer term solution to pitting confined
> to the very narrow raceway of the existing balls. I can't visualize
> whether the larger or smaller balls might spend all of their time on a
> fresh raceway.
>
> I'll ask the same question about a bottom bracket with separate cups
> and axle, too, except that the performance in this location is
> completely unlike what the balls are doing the headset.
>
> Harry
Just uncage the balls and use loose balls and more of them..not
smaller or bigger as these will ride in a different place in the cup
and cone and hurt them.
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