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Old 08-06-10, 10:03 AM   #1
Bianchigirll 
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Stein Crank extractor/Tap seen it?

Hello Everyone. I ruined a pair of Ofmega cranks the other trying to remove them, in my defense however the threads were not correctly done by the manufacturer. you could see where the threads were only originally tapped about half the norman depth.

I came across this fabulous tool but at $200 it is a bit pricy for fixing this crank set. has anyone ever seen one? do you know a shop/home mechanic who has it?

it appears the way it works is it works as a tap and cuts new threads then removes the crank. there is a companion single key release/extractor that is intended to be used afterward.

if anyone knows where one of these tools is in use I would certainly be willing to pay a few hard earned Rubles to have mine tapped.

http://biketoolsetc.com/index.cgi?id...item_id=SN-CES
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Old 08-06-10, 08:55 PM   #2
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Is it possible to tap the rest of the hole that you say was untapped as a defect?-(with the original size threads) Some LBS's may have the proper tap or your local machinist could probably do it. If you don't have one already, get a good crank extractor tool and hopefully it will work with the new threads. Also try pouring some boiling water over the crank to help make it easier to pull off. I'm a little suspicious of that tool and new bolt/extractor setup from above as the aluminum piece may not hold up to a crank that is stuck on the axle. And I may be wrong, but it will be hard to find a 24mm extractor tool to use if it fails. I know my old Shimano bolt/extractor felt a little iffy when I tried to pull my cranks so I just played it safe and used my proper extractor tool.
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Old 08-06-10, 10:37 PM   #3
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If the threads are already all stripped, you're only option is a helicoil...
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Old 08-07-10, 07:06 AM   #4
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they make a Helicoil for this? I had seen them for pedals but not the extractor threads.

the crank is off so removing it is nolonger a concern. I do have a few single key relase/extractor systems and in general they work quite well.

I have a Park double sides (standard and TA thread) tool as well as the Campi both right and left hand. is there a better one I should have?
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Others but still loved,; '80 RIGI, '80 Batavus Professional, '87 Cornelo, '09 Motobecane SOLD, '?? Jane Doe (still on the drawing board), '90ish Haro Escape
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Old 08-07-10, 10:19 AM   #5
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It seems the problem isn't with your crank extractor tools but with the crank itself so a better extractor wouldn't have prevented the problem.

I do have to ask if the Ofmega is worth the time and possible expense to resurrect? They weren't all that good when brand new and yours seem to have been defective from the start.
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Old 08-07-10, 10:45 AM   #6
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Quote:
Originally Posted by HillRider View Post
It seems the problem isn't with your crank extractor tools but with the crank itself so a better extractor wouldn't have prevented the problem.

I do have to ask if the Ofmega is worth the time and possible expense to resurrect? They weren't all that good when brand new and yours seem to have been defective from the start.
had I looked closer and noticed the defective threads I would not have tried to remove it in the first place. if I could find someone with the tool it would certainly be worth a few dollars to keep the crankset in working order. however I am not buying a $200 tool to fix a $30 crank.
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Old 08-07-10, 11:09 AM   #7
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Originally Posted by Bianchigirll View Post
had I looked closer and noticed the defective threads I would not have tried to remove it in the first place.
I'm sure you wouldn't but if the cranks had to come off somehow I don't know how you could have done it any better.

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..... however I am not buying a $200 tool to fix a $30 crank.
Excellent decision but there seems to be no end of people who don't make that wise a choice.
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Old 08-07-10, 11:25 AM   #8
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however if we did have the Loaner/rental system going one of the C&Vers suggested it would be a cool tool for saving all those old Stronglight and TA cranks.
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