Wanted: BB cup jam nuts (Attn: LBS retail sales)

Exclamation Point Jones wrote:
...
Jones... who once, as a kid, tried to sniff Elmer's glue. (heard it
was "kicks", but I got it all over me face!)

If you like getting white sticky stuff from a bull, these people have a
job for you: http://absglobal.com/.

--
Tom Sherman - Holstein-Friesland Bovinia
A Real Cyclist [TM] keeps at least one bicycle in the bedroom.

--
Posted via a free Usenet account from http://www.teranews.com

On Wed, 03 Oct 2007 15:48:02 -0500, in rec.bicycles.tech A Muzi
wrote:

Italian BB threads are 36mm x 24 tpi, 55 degree WW form.
After England invented industrialization, the Italians were right
behind, adopting metric diameters with Imperial pitch. Italian freewheel
thread is 35mm x 24tpi, also 55 degree WW form, headsets 25.4mm x 24tpi,
etc.

Well, that 55 degree bit is a common metric issue of which few know
much... or much is known by few... or the whole ****ing world wonders
why it's 55 degrees and not 60 degrees (pi/6), which makes *much* more
sense, giving the thread an equilatral triangle.

When you go to 55 degrees, you gotta ask if it's a male or female
thread you're cutting... then you have issues with the feminists on
the matter of sexism and do we really want *that* when all we're
trying to do is build a ****ing bicycle!!!???

Oh, well... you know how women are.

Jones... ducking for cover.

On Wed, 3 Oct 2007 16:26:31 +0200, in rec.bicycles.tech "James
Thomson" wrote:

I've read that there was a time when the Italians bought their lathes from
the British.

English engineering has always favored the aesthetic over the
functional design. Consider the Spitfi IMO, the prettiest piece of
art ever to be lifted by the hand of God... no match for the ME109 in
combat, of course, unless the latter was out of fuel, but, by gwad, it
*looked* better.

So, then we had the English Standard thread, which wasn't really a
metric system at all, but a cryptographic message from space aliens.

Jones

Exclamation Point Jones wrote:
On Wed, 3 Oct 2007 16:26:31 +0200, in rec.bicycles.tech "James
Thomson" wrote:

I've read that there was a time when the Italians bought their lathes from
the British.

English engineering has always favored the aesthetic over the
functional design. Consider the Spitfi IMO, the prettiest piece of
art ever to be lifted by the hand of God...

I passed a Spitfire on the way home today in my Honda. Oh, wait, that
was a Triumph Spitfire.

Not being pulled by a two-truck is good performance for a vintage
English car.

--
Tom Sherman - Holstein-Friesland Bovinia
A Real Cyclist [TM] keeps at least one bicycle in the bedroom.

--
Posted via a free Usenet account from http://www.teranews.com

!Jones wrote:
On Tue, 02 Oct 2007 12:21:19 -0700, in rec.bicycles.tech SMS
wrote:

Is this what you're looking for:
"http://harriscyclery.net/itemdetails.cfm?catalogId=39&ID=2294"?
or is it the wrong threading?

Yeah, that's half of what I had in mind. The other half had a left
thread... but, I'm convinced that it doesn't exist in our normal frame
of reference; therefore, I have cut a pair out of T6. All they do for
me is to hide the exposed threads, so... whatever that damn 'A' word
is, it works for me. "All-you-min-ee-yum" or something like that.

Did you actually have a tap to cut the threads on what you cut out? I
have a tap and die set, but nothing that large.

"James Thomson" wrote:
I've read that there was a time when the Italians bought their lathes from
the British.

!Jones wrote:
English engineering has always favored the aesthetic over the
functional design. Consider the Spitfi IMO, the prettiest piece of
art ever to be lifted by the hand of God... no match for the ME109 in
combat, of course, unless the latter was out of fuel, but, by gwad, it
*looked* better.

So, then we had the English Standard thread, which wasn't really a
metric system at all, but a cryptographic message from space aliens.

Not metric at all, Whitworth; designed by Joseph Whitworth, the first
broadly accepted thread standard. All else is revisionist!
--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971

On Oct 3, 6:40 pm, SMS wrote:
!Jones wrote:
On Tue, 02 Oct 2007 12:21:19 -0700, in rec.bicycles.tech SMS
wrote:

Is this what you're looking for:
"http://harriscyclery.net/itemdetails.cfm?catalogId=39&ID=2294"?
or is it the wrong threading?

Yeah, that's half of what I had in mind. The other half had a left
thread... but, I'm convinced that it doesn't exist in our normal frame
of reference; therefore, I have cut a pair out of T6. All they do for
me is to hide the exposed threads, so... whatever that damn 'A' word
is, it works for me. "All-you-min-ee-yum" or something like that.

Did you actually have a tap to cut the threads on what you cut out? I
have a tap and die set, but nothing that large.

A machinist's first instinct would be to cut that type
of large, fine pitch lockring thread on a lathe, rather than
with a tap. At least, that's what I think, but I'm not really
a machinist, I only talk to them. Since the threads in
question are the same as BB shell threads, cutters do
exist in that size, in Campy tool chests. But you can
chuck a lockring blank in a lathe much easier than you
can chuck a frame, so the need for a cutter is obviated.

BTW, Jones, people such as LBSes would have more
of a clue about what you wanted if you called them BB
lockrings, not jam nuts. However, although the non-drive-side
item is common (RH thread, adjustable cup), the
drive-side item (LH thread for English BB) is very unusual
as the vast majority of traditional BBs used a fixed cup
and no lockring.

Ben

A Muzi wrote:

Note the cold purposeful logic of
Swiss thread format. Abandoned by our industry of course.

Purposeful logic is the kind that says, "why the %@*% would you put
threads on an axle?"

Chalo

A Muzi wrote:
Note the cold purposeful logic of
Swiss thread format. Abandoned by our industry of course.

Chalo wrote:
Purposeful logic is the kind that says, "why the %@*% would you put
threads on an axle?"

I'm not sure I follow. It's an RH-reversed metric BB shell with matching
cups, m35x1G.
--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971

On Wed, 03 Oct 2007 18:40:39 -0700, in rec.bicycles.tech SMS
wrote:

Did you actually have a tap to cut the threads on what you cut out? I
have a tap and die set, but nothing that large.

Naa... you gotta do it on a lathe. It's like playing an old celluloid
record. You dial in what you want and take several passes.

Jones