The chuck assembly on my Guardian 16sp drill pres fell out. What is the fix for this? It has a tapered shaft. Does it need a retainer clip or something to hold it in?
The chuck on almost all drill presses is held on by friction only by use of the tapered fit you mention. Make sure both the spildle tip and the chuck hole surfaces are completely clean and dry. Set your table so when you move the spindle down it will contact the table. With the drill OFF, put the chuck on the spindle and press it down on with the table as hard as you can without bending any handles or gears. This should be sufficient to hold it in place.
SOURCE: Craftsman Drill Press chuck problem
It is unless there is a tang on the end. What you need to do is thoroughly clean the parts with something like brake clean to remove all the oil and then wipe with a clean paper towel. What I do it put the arbor into the drill press or the chuck onto the arbor and then put a 2x4 on the table and press the parts together or if you have enough room fully retract the jaws and use the block of wood to "tap" the parts to seat them. Let me know if you need more assistance
Testimonial: "Thanks rowdy45176. Your solution was spot-on. I cleaned both sides and them , with the chuck jaws fully retracted, tapped it with a plastic mallet"
SOURCE: press stops under even slight pressure on drill
adjust tension on pully or the belt may be worn or streched replace belt.
SOURCE: Replace drill chuck on 23 year old Craftsman 8" drill press
Yes it does have a Morse taper and you can remove it by gently hitting it with a rubber or nylon mallet.
SOURCE: How to uninstall Portalign Precision Drill Guide
Put a suitable rod or even a large nail in the hole drilled through the shaft of the guide, and give it a sharp tap with a hammer so as to start it to turn in an ant-clockwise direction. You will then find that the guide can be simply unscrewed from your drill, and the chuck replaced onto it.
SOURCE: Chuck keeps falling off drill press
While roughing up with sandpaper might work, but the usual problem that causes a chuck to fall off is a mismatched taper or either the chuck or the spindle has a dirty surface. The tiniest bloom of rust will cause this. Additionally a mismatch of depth will also cause a poor fit. To fit correctly the taper must be correct on both parts and they need to be clean and lightly oiled.
If it is necessary to san these pieces, use a very fine wet or dry paper. I would not use paper beyond 320 and use a light oil such as kerosene or diesel oil rather than water. Check the dept by looking inside at the wear marks. If the inside of the chuck receiver shows wear so close to the bottom that you cannot ascertain any distance between the wear marks and the bottom, the chuck may be bottoming instead of tightening on the taper correctly. You can easily check it with some fine shim material or perhaps three to five thickness of aluminum foil. Cut five thicknesses to fit in the bottom of the chuck (not all chucks have actual bottoms and go clear through) but not on the walls that are tapered. Reinstall, and remove. Is the aluminum foil damaged/show contact marks? If so, did the chuck go on all the way and come off more easily? If so, the problem is bottoming. Bottoming is quite rare but can happen when different than spec chucks are used.
You might also examine the surfaces of both. They should look pristine with no scratches and marks. If not, that could also be the problem. A correct taper fit is difficult to spin, or remove during normal drilling operations.
Good luck!
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