Drill Press Chuck Replacement

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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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    7 Discussions

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    pfred2

    2 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?

    6 replies
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    djpolymathpfred2

    Reply 2 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.

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    pfred2djpolymath

    Reply 2 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.

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    ThomasK19pfred2

    Reply 2 years ago

    I guess because you can then hammer the shaft out of the chuck. There's a tool (I don't know the English name - I'm German) which has claws and a spindle that could be used for this, but you'd have to buy it.

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    djpolymathThomasK19

    Reply 2 years ago

    I think you mean a 'gear puller'. I have one, but I wanted to do a full disassembly. Thanks.

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    ThomasK19djpolymath

    Reply 2 years ago

    Exactly that's the tool. I guess just for inspection and re-greasing it's also worth to take the drill press apart.