Hi John
Can you turn the job round .? you can protect the turned end with a peice of ally or brass under the driving dog
Nobby

Hi John,
You may be able to start with a slightly longer piece of material and cut this off later. It would depend on the thing you are making weather this method could be used.

Les.

I seem to remember bolting sacrificial pieces on both ends of some work and then drilling centres into the bolt heads. I was then able to turn the main work piece (and reverse it as required) and I managed to get all the surfaces I wanted true to each other. The drive dog was fitted to the extension bits out of the way of the cutting tool.

The only problem is that I really cannot remember why I did this now (as Nobby's way should work just fine) only that I had some kind of problem doing it the 'easy' way. I clearly wasn't bothered that I had screw holes in the work ends either. You have to do all the work you want concentric before you remove the centre extensions, as you won't get them back central again.

Funny thing memory. Some work I can remember just about every detail of it, other bits I have to think hard about why I even made them, let alone how.

IanT