A small one Steve 
This is where a little lateral thinking comes in and I should have elaborated...
I know my 400mm 4-jaw won't touch anything below 25mm, so if I needed to do that I would turn up a split bush and grip it that way. As you say, a collet would be the way to go but not everyone has those.
This is where a little lateral thinking comes in and I should have elaborated...I know my 400mm 4-jaw won't touch anything below 25mm, so if I needed to do that I would turn up a split bush and grip it that way. As you say, a collet would be the way to go but not everyone has those.
Hunting American dentists since 2015.