Ne 1 Know How To Take One Of These Apart?

[kvt]

Ok, refacing a carb needle in a 10" chuck sounds almost like a needle in a haystack. You have to do very precise holder and a very skinny saw to cut that slot, and a very good touch on the chuck adjustment, I could see messing up the threads if you clamped it down to hard. Just like this one, to much pressure on the chuck can still probably crush it.

 

[British Steel]

Very true, but metric Holbrook-type Crawford collets haven't been made in 40 years, like finding a thread wire in the swarf bin :-(