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-   -   The bottom bracket cup from HELL! (removal help) (https://www.bikeforums.net/bicycle-mechanics/953094-bottom-bracket-cup-hell-removal-help.html)

Aquakitty 06-10-14 04:34 PM

The bottom bracket cup from HELL! (removal help)
 
Edit: Solved, thanks hueyhoolihan.

Hi all,

I'm having a hell of a time with this one fixed BB cup.

I think it's a cheapo Schwinn bike. The removable cup on the left loosens counter-clockwise, so that means British threading and the fixed should remove clockwise, correct? And in a vise I should move the bike counter-clockwise?

Well I've tried everything I can think of. I tried the Sheldon Brown tool a few times with a giant bolt, all it did was bend the washers (I marked the BB cup with a felt to confirm it wasn't moving). I then tried the vise method turning the bike counter-clockwise and all this did was snap the cup from the vise leading to chips on the BB.... not enough surface to grip properly.

This is a homebuilt recumbent so it's a little awkward to manoeuvre. I'd just say screw it and use the cup but I wanted a much closer chainline and I don't have a short enough axle.

hueyhoolihan 06-10-14 04:42 PM

i can say that on my bike my Shimano un-7? BB drive-side cup is reverse threaded. the non-drive side is not.

Aquakitty 06-10-14 05:14 PM

Huh, that's interesting. If I've been turning this dang thing the wrong way the whole time I will eat the bearings. I can't get my head around this, any advice? Unfortunately there are no markings on the BB cups so I have no idea what it is.

Aquakitty 06-10-14 05:21 PM


Originally Posted by hueyhoolihan (Post 16839473)
i can say that on my bike my Shimano un-7? BB drive-side cup is reverse threaded. the non-drive side is not.


Oh my god I'm such an idiot. Ok I did the vise thing again turning the gaint-assed bike clockwise instead and it came loose. Thanks for getting me to rethink this. :thumb: I was turning it the wrong way in the vise.


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