That was my immediate thought. Centre punch the bottom end of the bolt, then drill into it frwith a long or extended drill bit. It should unscrew upwards. The cone or wedge could then be punched loose from the top.
John Betmanis Woodstock, Ontario Canada
At 10:59 AM 19/04/2008 -0700, Eugene Powell wrote:
>Do you have access from below? Could you drill/easy out the bolt back
>up the stem then draw the tapered nut down a bit, till the stem is
>freed up? How long is the steerer?
>
>Gene Powell
>Rad Finishes
>Portland, Oregon
>USA
>
>On Apr 19, 2008, at 8:02 AM, Kerrigan Bennett wrote:
>
>> Well, the bolt really is aluminum. Actually, the only other 1R that
>> I have
>> also had an aluminum quill bolt when new, but I replaced that one
>> with a
>> steel bolt. Maybe an unnecessary precaution, because I know plenty of
>> people have used these for years without problems -- Chuck Schmidt
>> among
>> them, according to the archives.
>>
>> This is probably a good place to remind listers about Jack Bissell's
>> Cinelli
>> stem and bars timeline at: http://www.43bikes.com/
>>
>> An excellent resource. Thanks, Jack. Interestingly, the stem in
>> question
>> had the earlier "Cinelli" face plate, but it did have an aluminum
>> quill
>> bolt.
>>
>> I may not be able to save the stem body if drilling doesn't go as
>> smoothly
>> as I plan, but at least I'll have some 1R spare parts. The stem is
>> about
>> 2cm too short for me and not particularly pristine, so I can live
>> without
>> it.
>>
>> Any other strategies would be appreciated, though.
>>
>> Kerrigan Bennett
>> Pleasant Hill, CA USA
>>
>> -----Original Message-----
>> From: Howard Darr [mailto:hdarr@embarqmail.com]
>> Sent: Saturday, April 19, 2008 7:42 AM
>> To: 'Kerrigan Bennett'; classicrendezvous@bikelist.org
>> Subject: RE: [CR]Cinelli 1R stem with cracked quill bolt
>>
>>
>>
>> K Bennett wrote <then using a drift punch to tap the shaft of the
>> quill bolt
>> to loosen the quill expander.>
>>
>>
>> Tap away but you might be tempted to use the biggest maul
>> available :-) If
>> it is really an alloy bolt it could bend fairly easily. That would be
>> really messy.
>>
>>
>> Howard Darr
>> Kinsman OH USA