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 Post subject: NOT a Nuovo Record BB
PostPosted: Sat Mar 16, 2019 5:04 pm 
Retro Guru
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Joined: Sun Jul 25, 2010 12:22 pm
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Location: Somewhere in the mid '80s..
I went to fit these Nuovo Record cranks on to what I assumed was the matching bb - not so, as you can see from the photos! On closer inspection, the axle is marked "68 SS B" which I've never heard of. The matching axle should be a 112mm "68 SS" for my British threaded frame.

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The cups aren't rifled so I can rule out that at least the cups aren't Nuovo Record. The axle measures approx 110mm and the right crank butts right up against the chainstay and isn't even sitting on the axle firmly at that. Is this an Athena etc?

I'm entirely doubtful whether the matching 112mm 68 SS BB set would be long enough, but in theory it should be spot on for the Nuovo Record cranks. Given that this is a winter bike, I could probably do with a cheap sealed BB unit. Could you recommend a unit that would match the cranks, please? Ebay links would be most appreciated.

Many thanks,

Craig


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PostPosted: Sat Mar 16, 2019 5:43 pm 
Old School Grand Master
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Joined: Fri Oct 14, 2011 8:41 pm
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Location: Cumbria
Tifosi might have something to fit,? Campag did some combined road / track bottom brackets but have an idea they were stamped CP or something. I wonder if it's a symmetrical Chorus RS?


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PostPosted: Sat Mar 16, 2019 10:24 pm 
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Joined: Thu Jun 07, 2012 9:37 am
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Location: Nottingham
You need a world logo 68ss. Shield logo is later.


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PostPosted: Sat Mar 16, 2019 10:26 pm 
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Joined: Thu Jun 07, 2012 9:37 am
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Location: Nottingham
The taper is considered by many to match jis taper so a un55 in 114mm may do the job.


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PostPosted: Sat Mar 16, 2019 10:35 pm 
rBoTM Winner
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Location: Newcastle upon Tyne
I think that BB might be Chorus - that had a 68-SS B marking according to the dealer manual. 1/4 balls 111mm axle and non-rifled cups. RECORD had the same axle marking but had 7/32 bearings and rifled cups

Attachment:
Chorus.jpg
Chorus.jpg [ 196.47 KiB | Viewed 152 times ]


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PostPosted: Sun Mar 17, 2019 12:27 am 
Old School Grand Master
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Joined: Fri Oct 14, 2011 8:41 pm
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Location: Cumbria
Ah, might be chorus then :)

I thought JIS and ISO used the same 2 degree taper..... Just which bit of the taper?


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PostPosted: Sun Mar 17, 2019 12:31 am 
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Joined: Thu Jun 07, 2012 9:37 am
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It's the old Iso on jis fine, jis on iso no. Needs a catchier rhyme. :-)


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PostPosted: Sun Mar 17, 2019 12:38 am 
Old School Grand Master
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Location: Cumbria
Lots of mix and match BITD as you say, got a bit trickier when they altered the axles and cranks to avoid the stabby front mech :)


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 Post subject: Re:
PostPosted: Sun Mar 17, 2019 9:14 am 
Old School Hero
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Joined: Wed Oct 21, 2009 1:51 pm
Posts: 182
Location: Kingston
Nuovo Record cranks are a real pain.

It depends whether they are pre or post 1978. Pre 1978 used a 112 mm axle, post 1978 used a 114.5 mm axle that was offset to the drive side. 70s cranks have a date code in a diamond on the back, 80s have it in a circle.

I have successfully used a Veloce 115mm triple bottom bracket with post-1978 cranks, but I had to use a shim on the drive side to offset it.

ImageIMG_20190317_074943034 by cromoman, on Flickr

ImageIMG_20190317_075013494 by cromoman, on Flickr

The shim is an old Shimano cassette spacer (I think) of about 2.3mm, it's pretty tight for clearance on the chainring. The photos are of a different bike that I just did to demonstrate it, but the crank is fully tightened onto the bottom bracket.

Best bet is to get a Nuovo Record BB to match the cranks, but they are a bit scarce. Otherwise it's trial and error.


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PostPosted: Sun Mar 17, 2019 3:34 pm 
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Joined: Fri Oct 14, 2011 8:41 pm
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Location: Cumbria
An old black Gran Sport axle tended to stick out a bit more, sometimes crop up cheap.


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