Help w Italian bottom bracket

Workshop tales, trials and disasters.
Maintenance tips, techniques and myths.
Technical discussion, description and outright lies

Help w Italian bottom bracket

Postby anthonyje » Sun Mar 16, 2008 10:50 pm

i
I have a NOS Olmo road frame and some second hand Campag parts. I measured the BB barrel and it is 69.5mm. The Campag BB is definitely 36x24 (Italian). The only problem is it wont fit - on both sides only about 1/4 or 1/2 turn then stops. I inspected the threads and could see no obvious problem apart a few specks of dust and metal filings
I dont want to force it so I need some help finding a LBS in Sydney north or Newcastle NSW who has expertise and maybe a thread cutter to free up the thread. Any help would be appreciated as I am anxious to get this project together.
Thanks, Ant[/i]
User avatar
anthonyje
 
Posts: 64
Joined: Thu Feb 28, 2008 8:26 pm
Location: Sydney/ CCoast/ Newcastle

by BNA » Sun Mar 16, 2008 11:13 pm

BNA
 

Postby Mulger bill » Sun Mar 16, 2008 11:13 pm

Any decent LBS should have the tools needed to chase BB threads Ant. For a while I was thinking about the RH thread on the fixed cup... :oops:

Shaun
...whatever the road rules, self-preservation is the absolute priority for a cyclist when mixing it with motorised traffic.
London Boy 29/12/2011
User avatar
Mulger bill
Super Mod
Super Mod
 
Posts: 25783
Joined: Sun Sep 24, 2006 2:41 pm
Location: Sunbury Vic

Postby Kid_Carbine » Mon Mar 17, 2008 10:59 am

Are you absolutely sure that the B/B shell is Italian threaded?
Just try some English cups, ... any old English threaded cups will do as you're only checking the thread.
Carbine & SJH cycles, & Quicksilver BMX
Now that's AUSTRALIAN to the core.
User avatar
Kid_Carbine
 
Posts: 1297
Joined: Tue Aug 14, 2007 11:35 pm
Location: Southern Highlands N.S.W.

Postby LuckyPierre » Mon Mar 17, 2008 12:54 pm

I'd definitely try an old English thread BB, but several of us have found that NOS frames will have built up enough oxidation in the BB threads to mean that they need to be chased out before assembly.
Be careful not to use force and damage your BB (like some-one I won't mention did).
Litespeed Classic - 3Al/2.5V titanium tube set, Record 9-speed groupset, Open Corsa Evo CX
Alchemy Diablo - Columbus Zonal tubing, Ultegra 9-speed groupset, UltraGatorskins
Gitane Rocks T1 - U6 tubing, Deore/XT groupset, CrossMarks
User avatar
LuckyPierre
 
Posts: 1432
Joined: Fri Jul 14, 2006 4:37 pm
Location: Canberra, ACT

Postby toff » Wed Apr 16, 2008 6:20 pm

Hi,

I just read this, and if you have a new frame, you shouldn't just throw in a bottom bracket without first preparing the frame. The shell will need to be checked for alignment, and possibly re-faced using special tools. There may also be some brazing "slag" that has made its way into the threads, requiring them to be re-tapped.

This is definitely a bikle shop job for the first bottom bracket installation.

Around North Sydney, I have used Le Spit Cyclery for this work on a NOS Colnago, and they did an excellent job, but they can be expensive so get them to quote on it first if you use them.

Hope this helps,

Chris
User avatar
toff
 
Posts: 584
Joined: Wed Mar 05, 2008 5:19 pm
Location: Between my seatpost and my stem.

Postby anthonyje » Tue Apr 22, 2008 10:53 am

just to finish the story...

I wrote to Mr Olmo via their website and all Olmos are Italian BB. So I cleaned out the BB with a Dremmel, greased it a bit, and the Campy BB I had went in with only a little resistance.

All smiles. Thanks to the guys above for your help.

Ant
User avatar
anthonyje
 
Posts: 64
Joined: Thu Feb 28, 2008 8:26 pm
Location: Sydney/ CCoast/ Newcastle


Return to The Shed

Who is online

Users browsing this forum: No registered users



Popular Bike Shops
Torpedo 7 Torpedo7 AU
Ground Effect Ground Effect NZ
Chain Reaction Cycles CRC UK
Wiggle Wiggle UK
Ebay Ebay AU

“Bicycles BNA Twitter
“Bicycles BNA Facebook
“Google+ BNA Google+
“Bicycles BNA Newsletter

> FREE BNA Stickers
> BNA Cycling Kit