How to remove a threaded bottom bracket? How to take this thing off? I think this bike is from West Germany. What tool do I need and is there a screwing direction trick? Thanks!
(I am taking this off to repaint)
That is called the bottom bracket and houses the bearings through which the crank axle sits. You'll need a specialist tool to remove it (see the small notches) and there are several different types on the market. Something like this might do it though?