Got a little 5 inch 3 jaw chuck. Marked "Rockwell, Made in USA, 25-870"
All it came with is a set of outside jaws, would like to get a standard set.
Anyone have any good ideas? Googling didn't turn up much, and I'm
not finding any in MSC/J&L/Enco.
The only way you are going to find them is to match them up at a used
machinery dealer or hobby show. I have about 50 sets that I don't know
what fit but I can't afford to do measurement survey including backside
thread pitch and hope I find a $25.00 sized sale. You are not going to
find them in any catalog though it might help to determine who made the
chuck. Rockwell surely didn't. Leigh @MarMachine
I think I have that same chuck, and I don't use it because I also have
an 8" 3-jaw for my Rockwell. I'll check tonight, pretty sure I have all
the jaws for it. If you don't see email tonight send me a reminder, my
address is real.