Drill Press Chuck Replacement

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Introduction: Drill Press Chuck Replacement

After searching the internet for information on drill press chuck replacement I didn't come up with anything thorough on presses without a morse taper. My drill press has a Jacob's taper, but no morse taper. This instructable should help with chuck replacement and older drill press engineering.

Step 1: Remove Spring

Loosen the nut and carefully remove the quill feed return spring and housing. Make sure the spring does not come out of the housing because it is difficult to reassemble.

Step 2: Remove Feed Lever

Remove the feed lever and pull the quill, shaft and chuck unit from the press.

Step 3: Remove Ring

Remove the retaining snap ring.

Step 4: Remove Quill

Bearings hold the quill to the shaft. Place wood or metal between the chuck and the quill. Give the shaft a few taps with a rubber mallet and the quill should come loose.

Step 5: Remove Shaft

Rest the chuck on something so the shaft is free. Place a metal object through the top of the chuck and tap the shaft out from the back of the chuck. This is the Jacob's taper.

Step 6: New Chuck

The Jacob's taper on the new chuck should match that on the shaft. Tap the chuck onto the shaft with a rubber hammer.

Step 7: Reassemble Quill

Tap the quill and bearings back onto the shaft.

Step 8: Replace Ring

Replace the retaining ring.

Step 9: Reassemble Drill

Insert the quill into the drill press and reassemble the feed lever and return spring. Test the new chuck with a dial indicator for run out.

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    6 Discussions

    0
    DoaS_DarkSnow
    DoaS_DarkSnow

    1 year ago

    I've reached step 5, but no amount of persuasion (lump hammer!) will persuade the shaft to separate from the chuck...

    0
    djpolymath
    djpolymath

    Reply 1 year ago

    Have you tried spraying in a penetrating oil like WD40? Let the oil penetrate overnight and then give it another whack.

    0
    Akbansmok
    Akbansmok

    Question 1 year ago on Step 4

    My quill is stuck, won't move up or down, I loosen the spring on the side , it didn't do anything. Should I remove the feed lever?

    0
    pfred2
    pfred2

    4 years ago

    Why couldn't you just take the chuck off the spindle while the spindle was in the press? Why did you have to disassemble half of the machine?

    0
    djpolymath
    djpolymath

    Reply 4 years ago

    You could remove the chuck and replace it without disassembling the quill, but I had a number of reasons for removing it. I wanted to investigate the engineering of the drill press because I couldn't find any good information on the Internet and I wanted photo documentation for anyone looking for it. I also wanted to make sure the run out was not due to a problem in the shaft or quill. I was also able to clean and grease the parts.

    0
    pfred2
    pfred2

    Reply 4 years ago

    run out does not matter too much on a drill press. It will stop as soon as the drill touches the work. Just make sure your drill bits are sharpened correctly. Twist drills are not exactly precision tools anyways. That's why the folks that manufacture reamers are still in business. But breaking it down you probably got to the bearings. It doesn't hurt to grease those occasionally.