David Bilenkey wrote:
> Ok, so I'd thought that mentioning that the BB spindle I'm trying to replace
> was pre-'78 but maybe I need more info. How do I tell if I need a 68-SS-120
> NR spindle for thick or thin cups? What would be the salient measure on the
> spindle? Outer bearing surface edge to outer bearing surface edge? This
> measures 49.5 mm on this spindle and is what's listed in my Sutherlands. Is
> this for thick or thin? Cups are English.
> Anyone have a snapshot of what the thick cup look like and what the thin
> cups look like? I'd put up a shot of mine, but my wife's away with the
> digicam for the weekend. :-(
> David Bilenkey
> Bilenkey Industrial Design
> Ottawa, ON, Canada
The Catalogo Campagnolo reprint that I think you already have has a chart with all the dimensions of all the bottom brackets from around 1982 and before (Gran Sport, Record, Nuovo Record and Super Record).
Look at the edge of the hole in the cup... if it is rifled then it is a Nuovo Record (thick cup); the Record (thin cup) has no rifling and preceded Nuovo Record. The rifling feature "pumps contaminating materials away from the bearings and extends the unit's life between servicings."
South Pasadena, Southern California
http://www.velo-retro.com (Reprints, Campagnolo Timeline and T-shirts)