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 Post subject: That's a big bore
PostPosted: Tue Jul 13, 2010 3:54 pm 
Devout Dirtbag

Joined: Tue Apr 08, 2008 10:09 pm
Posts: 124
Location: Leafy Surrey
Trying to get off the Stronglight cranks off my Holdsworth track bike. Bearing in mind when I got it 'we' had to recut the top race so it was an inch wide, rather than some daft probably Whitworth size or something.
Anyway, went to screw my Park double sided puller in and the Shimano side rattled about. Swapped it over to the fatter shorterside and and it went in ok, then when I heaved on it some alloy threads came out as well as the tool itself.
What size threads are on those cranks, and where can I get an extractor?
Normally I'd hand it over to my mechanic Henri but he's busy at the moment...


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 Post subject:
PostPosted: Tue Jul 13, 2010 4:34 pm 
Retro Guru

Joined: Sun Aug 03, 2008 12:31 am
Posts: 585
Location: London
Quote:
Bearing in mind when I got it 'we' had to recut the top race so it was an inch wide, rather than some daft probably Whitworth size or something.


???

Quote:
Anyway, went to screw my Park double sided puller in and the Shimano side rattled about. Swapped it over to the fatter shorterside and and it went in ok, then when I heaved on it some alloy threads came out as well as the tool itself.
What size threads are on those cranks, and where can I get an extractor?


The crank is now probably ruined/knackered.

The current crank extractor threads standard is 22mm, used by Shimano, Campagnolo etc. The other end of your tool is probably 23mm, used by TA.

If your Stronglight cranks are older than the 1980s, then the threads are 23.35mm. So the 23mm tool is undersized and has stripped the threads.


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 Post subject:
PostPosted: Tue Jul 13, 2010 6:33 pm 
Devout Dirtbag

Joined: Tue Apr 08, 2008 10:09 pm
Posts: 124
Location: Leafy Surrey
Not stripped,more just the top few thou taken off.
Believe me in my time I've made enough cranks mirror smooth at that end I know stripped when I do it !
Am off to source a bandylegged, humpty backed old man bike shop to see what they've got.
Bet Simpson, Yates and Edwards didn't have this trouble.


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