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rogerwdowns
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wentworth?
As I'm learning here,I'm gonna put this out there.
When I was fixing up a '73 Triumph Tiger 750cc,I learned of wentworth. Apparently we have S.A.E. measurements here in the U.S.,metric in the asian stuff and wentworth in merry ol' England. It's sorta in btw metric and S.A.E.
I dont know if this applies to E.R. hardware and lugs.
It seemed like either could fit until torque was applied,then STRIPPOLA! No go. I replaced a lot of nuts,bolts etc when restoring the bike,due to the previous owner crossthreading stuff. The proper stuff is available from reputable British mc suppliers.
Maybe this is the case w/the swivo mystery fit parts. Just a thought.
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3/26/2008, 8:14 pm
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tommykat1
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Re: wentworth?
Whitworth! Yes, some old English cars used the Whitworth system. Morgan was one, I think. By the early 60s, the survivors converted to the American SAE standard.
Interesting idea that maybe the English Rogers stuff is Whitworth. Now THAT would be a really cool find.
Great theory here, Rogerwd. Nutbox, any thoughts on this?
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3/26/2008, 8:27 pm
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rogerwdowns
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Re: wentworth?
whitworth! Thanks for the proper nomenclature,TK! The brain is slippin',just a little.LOL
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3/26/2008, 8:30 pm
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Nut Box
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Re: wentworth?
Rogerwdowns and TK, it amazes me that you guys know about this stuff. I expected that when I did that swivo comparison that I would come across the problem of the threads being to different specs. However, this was not the case. Anything with a thread on it, collets, set screws etc, seemed to be interchangeable. Some of my collet noses have no country of manufacture stamp on them, which I think are the early ones (1961/62), and even those were interchangable. The problem came with the differing sizes of the hex bar.
It did crossed my mind that the difference in size could be due to metrication but I thought it best not to go into this as you guys wouldn't know what I was talking about. I should know by now not to underestimate the guys on the ROF. In the UK our monetary system went metric in 1971 I think, but other things changed at different times. The early bar is the largest but still 3/8 nominally but the size could have got rounded down when there was a change which must have been some time in the mid 60s.
Whitworth as I understood it was a spec. for threads and defined the pitch and depth of a thread on a particular diameter of bar. We had other specs. as well. I remember there was a BA spec. which stood for British something. It looks to me though that the English Rogers hardware must have been made to the US standard. As rogerwdowns says maybe I will only know for sure when I tighten things up.
Thanks
Alan
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"You have to become the change you want to see in the World". - Mahatma Gandhi.
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3/27/2008, 5:57 am
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rogerwdowns
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Re: wentworth?
I'm just glad some of this information in my head can finally get out. After killing all those brain cells,I find I can only recall things for so long....that one was already fuzzy.    
I just LOVE it here! 
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3/27/2008, 8:06 pm
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tommykat1
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Re: wentworth?
Nutbox, remember, most of us on the forum from the US are old enough to remember the battle that went on in the 60s and 70s to convert to metric. And as enthusiasts, some of us know the British bikes and cars well, as we are fans of the storied British marques. Whitworth, Lucas--the Prince of Darkness, SU carburettors (note correct spelling), banjo unions, stainless steel drifts, etc., have been in our lexicon for years.
Wasn't sure about the Whiteorth thread pitch, though. Just knew that it was different from SAE and Metric.
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3/27/2008, 10:03 pm
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Nut Box
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Re: wentworth?
I said our money went metric and of course what I should have said is it went decimal, but I'm sure you caught my drift.
TK, all the bike and car stuff goes right over my head I am afraid. I spent a lot of my youth working on old rust buckets. I remember with terror the time I recon'ed a gear box and I've rebuilt a few engines, but I no longer see lying for hours on cold concrete as fun, and the rheumatism comes back occasionally just to remind me - as if I needed it. I feel I should ask what a Banjo Union is, but if I do you might explain and that would never do! These days I am happy to let the garage get on with it.
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"You have to become the change you want to see in the World". - Mahatma Gandhi.
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3/28/2008, 1:18 pm
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rogerwdowns
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Re: wentworth?
I remember as a kid being SO disappointed in my dad for not working on his own car. He was a hot-rodder from the '50s and always talked about all these fantastic cars. Now that I'm almost 40(!), I completely understand. You nailed it,Nut Box,Who wants to lay on the floor and work on the daily driver.
However,I dont trust ANYONE to be as anal as I am around the Harley or the Triumph or the '58 Ford F-100.
That might change if I win the lottery!LOL
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3/28/2008, 2:18 pm
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tommykat1
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Re: wentworth?
I agree, Rogerwd and Nutbox. I let the daily driver be taken care of by the pros. On a hobby car, however, rarely do I let anyone else touch it.
Nutbox, a banjo union or banjo bolt, as we say in the U. S. is...is...too hard to describe without a picture. I'll post one sometime.
Oh, and we know why you drunk your Guiness warm over there. You have Lucas refrigerators.
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3/29/2008, 12:48 am
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blujax01
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Re: wentworth?
While we're off-topic, you mention SUs. I had a '65 Spitfire MkIV and remember those consarn SU's were so finicky, I had to spend an amazing amount of time constantly setting the pin depths and adjusting the bell Jar springs. I found the best way to synchronize 'em was with a stethoscope. Slap the carbs on, and adjust based on the pitch of the air hissing through.
Don't even get me started on Lucas electrics! I got way to used to the smell of burning wire insulation!
Ran like a scared rabbit when it was right, though...
---
And those who were seen dancing were thought to be insane by those who could not hear the music ~ F. Nietzsche
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4/13/2008, 5:37 pm
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