Campagnolo square taper 70 ss consistancy?
03-28-20, 09:40 AM
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Campagnolo square taper 70 ss consistancy?
Someone explain to me why the cup/BB shell requirements are different for the lowest one in this picture? I thought SS was for road! Why is this spindle different?
P1030105, on Flickr
P1030105, on Flickr
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03-28-20, 09:49 AM
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First, ignore the stamping orientation.
Unfortunately in the 80's the markings are not enough, while all of these are for 70mm wide shell frames, during this time Campagnolo still had "thin" and "thick" cups.
The spindle with the wider spacing between the bearing races is for a thin cup assembly.
You are going to have to consult the relevant Campagnolo catalog, the overall length (within .5mm) will provide the first step, then you have to measure as they show in the catalog, the point of measure is not where I would want it, but so it is.
Unfortunately in the 80's the markings are not enough, while all of these are for 70mm wide shell frames, during this time Campagnolo still had "thin" and "thick" cups.
The spindle with the wider spacing between the bearing races is for a thin cup assembly.
You are going to have to consult the relevant Campagnolo catalog, the overall length (within .5mm) will provide the first step, then you have to measure as they show in the catalog, the point of measure is not where I would want it, but so it is.
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03-29-20, 05:54 AM
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OK well I am surprised there is that much difference between thick and thin. Now I am guessing Campy didn't make thin cups for Italian BB's.
Good source of a variety of catalogues?
Good source of a variety of catalogues?
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03-29-20, 02:34 PM
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First, ignore the stamping orientation.
Unfortunately in the 80's the markings are not enough, while all of these are for 70mm wide shell frames, during this time Campagnolo still had "thin" and "thick" cups.
The spindle with the wider spacing between the bearing races is for a thin cup assembly.
You are going to have to consult the relevant Campagnolo catalog, the overall length (within .5mm) will provide the first step, then you have to measure as they show in the catalog, the point of measure is not where I would want it, but so it is.
Unfortunately in the 80's the markings are not enough, while all of these are for 70mm wide shell frames, during this time Campagnolo still had "thin" and "thick" cups.
The spindle with the wider spacing between the bearing races is for a thin cup assembly.
You are going to have to consult the relevant Campagnolo catalog, the overall length (within .5mm) will provide the first step, then you have to measure as they show in the catalog, the point of measure is not where I would want it, but so it is.
https://www.os2.dhs.org/~john/campy-BB-specs.pdf
Another possibility is that the bottom spindle is a C-Record spindle for use with 3/16" balls, which would require wider spacing between the shoulders than a spindle using 1/4" balls.
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03-29-20, 02:39 PM
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Yes, they did. "Record" cups were all of the "thin" variety, as were pista cups. Only Nuovo Record road cups and Super Record cups came in the "thick" variety.
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03-30-20, 05:01 AM
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JohnDThompson - Excellent! Great resource! Thanks!
I now have to decide to look for thin cups. I think I can measure the radius of the race on the spindle and compare to the others.
I may have another option coming soon.
I now have to decide to look for thin cups. I think I can measure the radius of the race on the spindle and compare to the others.
I may have another option coming soon.
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03-30-20, 11:18 AM
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If you need it, I have a spare, Italian-threaded thin adjustable cup. Oh, and another guide to help find the thin cups is that they don't have the rifling at the axle hole.
Yours for the cost of shipping.
DD
Yours for the cost of shipping.
DD
03-30-20, 07:45 PM
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Jeff, Thanks! I'll pm you tomorrow.
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03-30-20, 08:11 PM
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Someone explain to me why the cup/BB shell requirements are different for the lowest one in this picture? I thought SS was for road! Why is this spindle different?
P1030105, on Flickr
P1030105, on FlickrAlso worth noting, apart from shoulder width differences, are centre to exle-end differences and differences in length overall.
Axles were made for pre- and post-CSPC front mechs and varied for length to accommodate the flange, or lip, that the American Consumer Products Safety Council mandated had to be added to the leading edge of the front derailleur cage.
If you can find a copy of Sutherland's Handbook for Bicycle Mechanics, either the fourth or the fifth edition (I think for this era, the fourth is more useful), you'll find an excellent breakdown in there of all of the technicalities.
03-31-20, 05:05 AM
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gfk_velo Thanks for the Sutherland reference. I will look for a copy. Thought I had downloaded a 4th edition. Too many years ago.
The shield loga these show was introduced in 1985, long after CSPC. They are different lengths with the lowest being 109. I believe the center is 115 and the other 111. Doesn't really matter at this point.
It is interesting that there are so many iterations.
The shield loga these show was introduced in 1985, long after CSPC. They are different lengths with the lowest being 109. I believe the center is 115 and the other 111. Doesn't really matter at this point.
It is interesting that there are so many iterations.
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03-31-20, 05:21 AM
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What??? Only 2 wheels?
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If you have any spare axle hole rifling I'll take it and pay for shipping. Don't need the cups, just the rifling.
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