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The knob on the other side came off after a one day soak in evapo-rust. It did take a number of nylon mallet blows spaced around the inside surface for it to move.
I sprayed the frozen knob / shaft interface about 6 times over the course of 2 days with "Kroil". No luck budging it. I then decided to submerge it in evapo-rust for 2 days, again with no luck.
I can only think of two other options.
- Apply heat with a propane torch and try rotating the knob vs. striking it with a mallet. I'll need to wrap a piece of leather belt around it so that it doesn't get damaged by the pipe wrench.
- Use a slide hammer. (don't have one....). Since the end of the knob is solid, a bearing / gear puller won't work. The problem with this is I have no good way to hold the shaft from moving. There is a lock collar that you can just see on the other side of the headstock but even with the nylon hammer blows, it causes the lock collar to slide and dig up the shaft. The set screw just can hold it. I suppose I could back it up with a big c-clamp to help it out.
Since the threaded hole goes all the way into the shaft bore hole, you would need to avoid screwing the bolts in too far!
