15 Sep '14, 10pm

Remove A Bike's Stuck Bottom Bracket With This DIY Tool

The wrench normally used to remove the right-side cup, has a circular hole with two flats on each side, and can easily slip off the cup and get gouged if not aligned properly. That's why I use a length of threaded rod to clamp the wrench over the cup and against the bottom bracket shell, using a nut and a pair of washers on each side (see top image). This will prevent the cup wrench from slipping sideways when you apply some force. You may need to gently tap the wrench with a mallet to get the cup moving, but once it's in motion you are home-free. (Alternately, if you lack the cup removal wrench, you can try clamping the two flats on the cup between the jaws of a vice, and rotate the frame clock-wise around this point. The narrow profile of the cup makes it easy to slip out of the vice, possibly damaging both cup and vice.)

Full article: http://hackerspace.lifehacker.com/remove-a-bikes-stuck-bo...

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