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My stubborn race broke the bike shops tool: Now what?

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My stubborn race broke the bike shops tool: Now what?

Old 04-22-10, 12:06 AM
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Motobetird
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My stubborn race broke the bike shops tool: Now what?

I have a 70s Colnago that I was trying to change the headset out on, however the race on the fork broke the tool which the bike shop uses and they said that they can not do it. I know that I can buy another fork but the crome fork looks good on the bike. Any other method to get a stubborn race off? I'm assuming that this race did not fit this fork and the previous owner jammed it on there. Not opposed to the method but at least do it with a nice headset...
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Old 04-22-10, 12:14 AM
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Haven't tried the following and do not assume responsibility if something goes wrong, do at your own risk.

If I were in your situation, here's the things I might try:

(1) Soak in PB blaster or other penetrating oil.

(2) Apply heat, from a propane torch

(3) VERY carefully cut it off, like with a dremel tool. But it's easy to cut your fork this way and that could weaken it.

(4) Put it in a freezer. Holes in metal get bigger, diameter of head tube will get smaller.

Thinking about it, I would try order 4 - 1 - 2 - 3, that's the order that I'd be most worried about damage in.
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Old 04-22-10, 12:28 AM
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Sounds risky, I hope that it doesn't have to come to that.
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Old 04-22-10, 05:35 AM
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If you're ditching the headset, break the race. Cut it part way and try and spread the cut part. If you do it right you won't stress the fork at all. Put race in metal recycling

Oh and have the shop clean up the fork after. Put antiseize or something after.

It's possible the fork has some Loctite on it, if the crown wasn't faced and therefore wasn't quite round/etc.

cdr
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Old 04-22-10, 06:04 AM
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The following method has worked for me: I flip the fork over, and rest the steer tube on a wood block on the floor. Then, using a long, standard-slotted screwdriver and hammer I evenly tap the race off in small increments while working from the front and back of the fork.
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Old 04-22-10, 08:54 AM
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lunacycle's method FTW. On a lot of modern carbon forks, you can't just tap the race off as it doesn't protrude past the fork, or at least not much. But, on a 70s Colnago that I assume has a steel fork and a big steel crown race, you can usually tap it right off with a screwdriver and mallet. On carbon forks I will sometimes use a putty knife to get it moving that first small increment.
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Old 04-22-10, 08:57 AM
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apply heat.
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