A Practical Guide to Delta Drill Press 17 900 Chuck Install
The Delta 17-900 is a 16 to 17 inch floor press that owners keep running for decades, and fitting a fresh chuck is one of the most satisfying upgrades you can make to one. A Delta drill press 17-900 chuck install is simple once you know these presses use an MT2 spindle, so the whole job is matching a JT33 chuck to an MT2 arbor and seating both tapers clean.
A drill press chuck install means fitting a new chuck to the spindle by way of a tapered arbor: the chuck wedges onto the arbor’s JT33 taper, and the arbor’s Morse taper wedges into the spindle. Done right, both tapers seat by friction and the chuck runs true.
Short answer: confirm the 17-900 spindle is MT2, fit a JT33 chuck onto a matching MT2 arbor, clean every taper surface until dry and bright, then seat the chuck on the arbor and the arbor in the spindle with firm pushes.
Confirm the taper first
The 17-900 uses an MT2 spindle. Before buying, glance at the old arbor or the manual to confirm, since an MT3 or MT2 mismatch will not seat. Match the chuck’s JT33 stub to the arbor’s JT33 socket as well.
The chuck to install
A keyed JT33 chuck with an MT2 arbor and key is a dependable match for a press this size, gripping firmly for the larger bits a 17-900 turns. The honest drawback is the chuck key you must keep on a hook so it is never lost.
If you prefer hand changes, a keyless JT33 chuck fits the same MT2 arbor, with the tradeoff that keyless chucks can loosen slightly under heavy metal cuts. Who should skip each: skip keyless if you drill metal hard on this floor press; skip the keyed chuck if convenience beats maximum grip.
Installing it, step by step
- Unplug the press.
- If a chuck is present, remove it by exposing the spindle slot and driving the arbor out, or pressing the chuck off with wedges.
- Clean the arbor’s MT2 taper, the spindle bore, the JT33 stub, and the chuck bore until dry and bright. No oil.
- Press the chuck onto the arbor with jaws open, one firm push or a soft-mallet tap on the arbor end, never on the chuck body.
- Retract the jaws, then seat the arbor in the spindle with a firm upward push.
- Chuck a straight bit, spin by hand, and confirm no wobble.
Match MT2, clean the tapers, seat firm
Installing a chuck on a Delta 17-900 is easy because the MT2 spindle takes standard JT33 chucks. Confirm the taper, clean every surface, and seat both joints firmly, and this big press drills dead true.
Three takeaways:
- The 17-900 uses an MT2 spindle with a JT33 chuck arbor.
- Clean and dry every taper surface; oil stops the taper gripping.
- Seat the chuck on the arbor and the arbor in the spindle with firm pushes, then check for wobble.
FAQ
What Morse taper does the Delta 17-900 use? An MT2 spindle. Confirm against the old arbor or the manual before buying, then match a JT33 chuck to an MT2 arbor.
Should I install a keyed or keyless chuck? Keyed grips firmly for the larger bits this press turns; keyless is convenient for hand changes. Choose by how hard you drill metal.
Do I press the chuck onto the arbor first or the arbor into the spindle? Fit the chuck to the arbor first, with jaws open, then seat the assembled arbor into the spindle with jaws retracted.
Why does the new chuck wobble? Usually a dirty or nicked taper. Clean all mating surfaces and inspect the arbor before reseating.
Should I oil the taper to help it seat? No. Oil prevents the friction grip. Keep every taper surface clean and dry.
Where do I tap to seat the chuck on the arbor? On the arbor end with a soft mallet, never on the chuck body, which can damage the jaws.
References
- Delta Machinery, drill press manuals and parts information: https://www.deltamachinery.com
- VintageMachinery.org, Delta drill press documentation: http://vintagemachinery.org
