I could have done with these last night!
I turned up an adjustable spacer for my coma corrector on the lathe yesterday, when the spacer was complete I needed to turn up a thin 2.5mm locknut.
I decided to leave the finished spacer in the lathe chuck and use it as a fixture to hold the locknut for turning.
After the locknut was complete, I removed the spacer from the chuck and tried to spin the locknut off.... no go.
Duh... it is a locknut after all, I was cursing myself for my stupidity
Into the freezer it went, and after many cycles of freezing and twisting I finally got the locknut off. Sore hands this morning tho!