ega
That 4½" chuck weighs in at 5.5 kilos with backplate, I have it with a Boxford plate. I think the Boxford can easily manage that.
The yellow paint seems standard, though I do have a 5½" without it, and another 5½" with it. Don't use them since I got the 4½". The 5½" ones only have single sided jaws for holding bar through the chuck. Other jaws were available.
Edited By Robbo on 02/10/2017 12:24:09