What type of collet chuck is that?
if you mean this one?
its an ER20 collect chuck that I made for fitting to the spindle of my lathe
on the bottom half of this thread
https://www.mig-welding.co.uk/forum...chine-modifications.58888/page-2#post-1102570
you can but ready made ones for ER16, ER25, ER32 and ER40 collets, but not for ER20 collets, and I use ER20's so made my own
https://www.arceurotrade.co.uk/Catalogue/Collets/ER-Lathe-Collet-Chucks