Could vibration damage a chromaloy frame

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Could vibration damage a chromaloy frame

Postby adrian_d » Sun Aug 05, 2012 9:40 pm

Hey all,
In my attempts to get the crank off the bike (it was literally fused on) I tried to cut the crank off with a jigsaw(since i was replacing the bottom bracket) It wasn't the best idea to do that, but I managed to get it off, I was wondering if the vibration of the jigsaw could have weakened the welds on the frame?
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by BNA » Sun Aug 05, 2012 9:48 pm

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Re: Could vibration damage a chromaloy frame

Postby Nobody » Sun Aug 05, 2012 9:48 pm

Unlikely. You stomping on the pedals while standing would probably give more force than the jigsaw can produce.
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Re: Could vibration damage a chromaloy frame

Postby ldrcycles » Sun Aug 05, 2012 9:55 pm

Not a chance, the frame would see far more vibration/energy put through it on a rough road. Not 2 months ago i had to cut a crank arm off a BB, the previous owner had completely stripped the extractor threads, very careful use of an angle grinder did the trick (maybe a dremel would have been better but i haven't got a dremel).
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Re: Could vibration damage a chromaloy frame

Postby adrian_d » Sun Aug 05, 2012 10:29 pm

Thanks for the heads up :)

I was worried somewhat after all my hard work that I had stuffed up.

Would you believe i grabbed 2 flat screwdrivers inbetween crank and bottom bracket, a few gentle taps were enough to wedge the crank off. I should have done that first off.
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Re: Could vibration damage a chromaloy frame

Postby rkelsen » Mon Aug 06, 2012 10:02 am

Bush mechanic tip: Loosen the bolts and go for a ride.
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Re: Could vibration damage a chromaloy frame

Postby Mulger bill » Mon Aug 06, 2012 9:48 pm

rkelsen wrote:Bush mechanic tip: Loosen the bolts and go for a ride.

This, used it before. First time inadvertent after not putting enough grunt into the tool when re installing. :oops:
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Re: Could vibration damage a chromaloy frame

Postby ldrcycles » Tue Aug 07, 2012 12:02 am

First time it happened to me was when i borrowed the crank bolts for another bike and forgot to replace them, next time i rode it i only got about 2k :) .
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