Help on disassembling and greasing drill press chuck

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Forum topic by AndyHm posted 11-30-2020 11:06 PM 340 views 0 times favorited 5 replies Add to Favorites Watch
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1 post in 56 days

11-30-2020 11:06 PM

Topic tags/keywords: drill press chuck question

Hello all!

I recently bought a drill press and I believe that the chuck needs some cleaning and re-greasing. The chuck seems to work fine, but it tightens and loosens a little jerkily, and makes a lot of noise when the drill is on. I removed the chuck and turned on the drill, and the noise was for sure coming from the chuck (shaking it makes a rattling sound). From what I have read, it looks like I need to take the chuck apart to clean and re-grease it, but I am rather nervous about breaking/damaging the chuck. I think the chuck is a 33 taper, 1/2 inch Jacob’s chuck, and I am looking for tips or advice on taking it apart. I have not yet found a good set of instructions on how to do it. Any help would be appreciated!

Here’s an image of the chuck:

5 replies so far

View nicksmurf111's profile


377 posts in 2425 days

#1 posted 12-01-2020 08:00 PM

Soak it in penetrating oil and try to work the dirt out of it. If that doesn’t work, replace it. Aren’t drill chucks super cheep? I was lubricating one last night.

-- Nicholas

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Richard Lee

368 posts in 1749 days

#2 posted 12-01-2020 08:17 PM

Some cheap chucks arent worth even lubricating.

View splintergroup's profile


4414 posts in 2197 days

#3 posted 12-01-2020 08:35 PM

They typically have a snap ring installed inside the rear. Pull that out and watch the insides fall out 8^)

They are not complex inside, basically each jaw rides in a helical groove. The only thing you need to do is number the jaws (1,2,3) and remember the order of the numbers (clockwise/counter clockwise, whatever you chose). You can also scratch small notches instead of numbers. Most I have dug into have the jaws already labeled on the interior.

View SMP's profile


3195 posts in 880 days

#4 posted 12-01-2020 08:53 PM

I tried it once. The one I had had an allen head screw down inside the bottom of the throat. Only over the years it got full of gunk and when i tried to loosen it I completely stripped the head of it with my allen wrench, since i couldn’t see what I was doing. Ended up just getting a replacement on Amazon for $28

View MrUnix's profile (online now)


8360 posts in 3173 days

#5 posted 12-01-2020 11:31 PM

Looks like a cheap knockoff of a Jacobs chuck… it will have either a snap ring holding things in place, or is a press fit. You need to figure out which one you have – which is pretty easy. True Jacobs chucks and those that are press fit need to be opened up so the tips of the jaws are retracted to just below the surface, and then the body is held so the inner core can be pressed out. A quick google for ‘drill chuck disassembly’ will turn up dozens of videos showing the process. There are rebuild kits for the more expensive chucks out there, which consists of three new jaws and a new split nut for when they get really sloppy.


-- Brad in FL - In Dog I trust... everything else is questionable

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