Re: [CR] Italian thread fixed cup


Example: Production Builders:Teledyne
Date: Sun, 3 May 2009 19:33:01 -0500
From: "John Thompson" <johndthompson@gmail.com>
Organization: The Crimson Permanent Assurance
To: <classicrendezvous@bikelist.org>
References: <975880.12403.qm@web45705.mail.sp1.yahoo.com>
In-Reply-To: <975880.12403.qm@web45705.mail.sp1.yahoo.com>
Subject: Re: [CR] Italian thread fixed cup


Mike Larsen wrote:
> How do many of you keep an Italian thread fixed cup with right hand
> threads tight in the BB? Does the difference between loose bearings
> and caged bearings make a difference. Is it unheard of to switch the
> cups to the opposite sides with the lock ring on the crank side.
> When did Sugino start making Italian thread cups? Is right hand
> threads common on fixed cup side for Italian threads? My Fiorelli is
> the same as my Lambert.

Italian thread is right-hand on both the adjustable and fixed sides. To keep the fixed cup tight, I just install it really tight, using the Campy 793/A tool and cheater pipe.

I suspect your Lambert was tapped Italian at some point after it left the factory. Lambert BB shells were unthreaded, and used pressed in cartridge bearings and a trouble-prone untapered spindle. The inside diameter was too large for English threading, but Italian worked when the original BB bearings and/or spindle gave out.

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-John Thompson (john@os2.dhs.org)
Appleton WI USA