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Drill Press Chuck

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johnbron
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Drill Press Chuck

Postby johnbron » Fri Dec 17, 2004 7:46 pm

I have a real old drill press that has a chuck that wobbles slightly. :o The arbor is true but the chuck does not spin true. It has a jacobs chuck on it. Do any of you guys know the secret to removing the chuck for checking the problem?. :)
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Postby beaconlight » Fri Dec 17, 2004 8:46 pm

I have removed chucks by shock or sudden impact. Chucks come apart too. You can replace Jaws and springs. Does your chuck have 1 or 2 holes in it at the top The ones I took apart did. Just put a piece of drill stock in and wack it with a hammer. Once it loosens it comes off easy.

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Postby johnbron » Fri Dec 17, 2004 10:21 pm

I didn`t notice any holes in it beside the chuck-key holes. I will give it a better look tomorrow and get any numbers off of it for research.
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Postby Bruce Sanford » Sat Dec 18, 2004 9:10 am

Some of them are just threaded on like a nut.Ihave not changed on a drill press.I have done it on drills replacing keyless chuck to key chuck.Open the jaws of the chuck all the way and look up the middle of it.You may find a bolt that holds the chuck on. :)
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Postby George Willer » Sat Dec 18, 2004 12:01 pm

Bronson,

I'm unable to go to the shop right now to check (There are 6 drill presses there), but the chuck itself may offer a clue. A very common method for mounting drill press chucks is the #33JT (Jacobs taper). These chucks should have that identification marked right on the chuck as part of the model number. The chuck will have a female tapered hole which often fits an arbor that is #2 morse taper on the other end to fit the bore of the spindle. In that case, there should be a slot in the spindle to insert a tapered drift to knock the arbor out.

If the #33 taper is an integral part of the spindle, the normal method of removal is with a tapered, forked tool that drives between the chuck and the spindle nose.
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Postby johnbron » Sat Dec 18, 2004 3:15 pm

Thanks for the info George. I just got this info off of the chuck.

Jacobs Multi-Craft 5/64-1/2 in.Cap 2-13 MM. DC8K64=1/2"-20 Thread.

There are a few deep scars on top of the chuck from somebody pounding/hammering on it. I just need to figure out how to remove the chuck.

Where it mentions Thread on the I.D. puzzles me. I am going to do a Google and see what I can come up with.
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Postby John *.?-!.* cub owner » Sat Dec 18, 2004 6:37 pm

I believe that information would indicate it is a screw on. Open the jaws all the way and check for a screw head inside it. Very unusual on a drill press, since very few of them are reversible. Remove the screw if it's there (maybe left hand thread, but not sure). Once the screw is out, or is there is no screw get a large allen wrench and clamp the short side in the chuck. Take a small hammer and keep striking the long side of the wrench trying to spin it in the same direction the chuck turns. May take several hits, but will normally loosen the chuck. If you can find a way to hold the shaft from truning while striking the wrench it will help.
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