Posted by Lambton on 08/04/2013 17:43:12:
You will probbly have to machine a chuck back plate to suit the lathe spindle then any suitable diameter chuck can be fitted to this backplate.. If you can only justify buying one chuck always go for a 4 jaw independent chuck..
I have looked into making a backplate, and it appears technically "plausible"
However, I can't find any trace of small (enough) chucks that actually use a backplate. All the small-enough 4 jaw independent chucks seem to have a one-piece body.
This is further supported by the fact that the smallest semi-machined backplate I can find is 4" ; even the "tiny" mini-lathes are 7×10 (and up) where the Simat is 4×12 (aka 2×12 in English).
Although… checking the advert the Simat is 5 1/4" in the gap, so a LOW profile chuck could have a large diameter. But "low profile chuck" and "having a back plate" are again contradictory.
BugBear (googling for information and products)