Re: FOUR JAW CHUCK do like it or hate it 4
I am really doubtful that the Bison combination chuck would ever function accurately as a universal chuck. And,it'll cost you a pretty penny to find out if it doesn't !
Are you familiar with knowing that if you have a part accurately centered in a 4 jaw,you cannot just remove the work by loosening 2 jaws,then try putting in another piece of work the same diameter,and tightening the 2 jaws back(What a run on sentence!!!) Anyhow,it never works: The 4 jaw invariably has to be dialed back in. This because of play in the chuck jaw screws,play in the seating of the jaws in the chuck body,etc. It just never works. I think the combination chuck would be only an APPROXIMATELY self centering chuck for the same reasons.
BUT,If you do buy one,DO let us know how accurately it functions as a self centering chuck. I'd LOVE to know. Just in case by a miracle it works accurately.
I wonder if Bison would reveal information on how accurately their combo chuck does function as a self centering chuck? Probably would not be any use to ask the distributor. You'd have to ask Bison directly. The dealer would not know. With the considerable investment at stake,it would really be great to know in advance. Otherwise,you're probably potentially just buying a chuck that would still have to be dialed in every time.