Old 08-21-20, 01:04 PM
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Iride01
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I don't think it's a self extracting bolt. I think it might be for self extracting crank arms, but you took the wrong thing off.

Should be a cover with a bolt or nut (depending on type). You use a tool smaller than the tool to take the cover off and turn the nut or bolt beneath the cover.

The bolt or nut must be screwed all the way in and the cover must be all the way on. They loosen in the opposite directions, so when you loosen the nut/bolt, it pushes on the cover and also pushes the crank off the spindle.

But, I'm not guarantying that is a self-extracting crank. But at first glance it looked like it is.

If what you are holding is entirely one piece, then probably not.
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