If that's the drill press I think it is, it has a standard MT2 socket spindle. I don't recall how it's mounted to the chuck, but would guess a standard JT. But regardless, I would buy a better arbor AND chuck. The arbor may prove usable (they are not that difficult to make true) IF you can get the chuck off it. But most of the time it's difficult to release a JT, and good arbors are cheap. I generally get Phase II arbors from Enco, old Jacobs (before Danaher) were excellent, and even new Jacobs is actually ok (but not the chucks). For chucks, ebay is my usual source, but you either need to know what you're looking for (and find good pictures), or just plan on putting a kit in it. A few years ago I bought/rebuilt several older Jacobs 3Bs with kits that cost me less than $4 each (IIRC, I bought 10 for $40 including shipping). I kept the best for myself, and sold the others (still a smoking deal for a fresh rebuilt chuck) to offset all my costs and then some. Rohm makes some good chucks for a decent price, and the 1/2 keyless used to be a regular on the Enco sales, but not in the last year or so.