Having recently bought and now checked over the 2A, I see that the arbor is completely plain; as in there is no milled slot to take any form of locking key to stop the cutters from turning on the arbor. Is the Centec unusual in this area or do I need to get a slot milled into it. The arbor looks original, left hand thread to undo, 2MT on the taper, just no slot in it?
I couldn't check before as the machine was set up and had a cutter in place which rotated etc, so I took it for granted that it was all there.