Hey - some on-topic Campagnolo stuff! Now that's what the world needs more of!
For those inquiring minds out there, the correct spindle length is 115.5mm (70-SS). For BSC or French BBs using Record crankarms of the same vintage (late 1977 to 1987), it would be 114.5mm (68-SS). The spindle offset matters too - these are not symmetrical spindles (those started {for road} with the 111mm C-Record etc. ones in 1985).
The rear hub spacing doesn't matter (i.e. 120 vs. 126) - you have to match the vintage/type of the crankarms with the vintage/type of the spindle. You also must match thin-cup (steel-only) spindles with (steel-only) thin cups, and thick-cup spindles with thick cups, as the bearing shoulder spacings are different. There was no Nuovo Record track or triple BB (only NR doubles; although 'cross, at 3.5 mm longer on the RH side, may have been made in an NR version - anyone know for sure?) SR only works with SR, as the bearings were a different size. Gran Sport, Record, NR, and SR BBs all had different/unique spindles at any given time, although they were all the same overall length.
Simple, no?
Now THIS is fun!
Greg Parker Campagnolo-nerdland
P.S.
68-SS / 70-SS marking on a spindle doesn't always mean 114.5 / 115.5 -
Campagnolo (rather confusingly, IMO) retained that nomenclature for newer,
completely different spindles! (Who was minding the store that week, anyways?)
> Date: Wed, 10 Mar 2004 17:05:03 -0800 (GMT-08:00)
> From: chasds@mindspring.com
> To: classicrendezvous@bikelist.org
> Subject: [CR]WTB: Campagnolo bb spindle
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> Thanks to a couple of helpful listers I now know what spindle
> I need.
>
> I'd like to buy, or trade for, a Campagnolo record or similar
> SS70 bb spindle, 114-116mm for the standard thick cups.
>
> I'll pay a fair price.
>
> Thanks.
>
> Charles Andrews
> Socal