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Tool Talk Discussion Forum

Drill chuck falls out

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Nifty50

11-30-2005 17:06:13




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I have a Sears/Craftsman 10" drill press (1/2" Chuckless chuck - JT33).

I am having a problem keeping the drill bit chuck from falling out when drilling. I put it on the shaft & it stays there okay, but when I start to drill into material it comes loose and flies off of the shaft.
Any suggestions would be appreciated...




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Robert in Md

11-30-2005 20:12:41




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 Re: Drill chuck falls out in reply to Nifty50, 11-30-2005 17:06:13  
Locktile is fine, but if you clean both surfaces and coat with chalk, the kind we old teachers used, and jam the chuck on it will hold.



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old

11-30-2005 19:10:01




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 Re: Drill chuck falls out in reply to Nifty50, 11-30-2005 17:06:13  
I've had the same problem a few times. I clean every thing up real good with carb cleaner and the with the center in I hit it a few times with a hammer and so far the last time I did that was 2 years ago. I do hit it good and hard a few times and make sure its very clean.



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Davis In SC

11-30-2005 18:55:40




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 Re: Drill chuck falls out in reply to Nifty50, 11-30-2005 17:06:13  
So i assume, that the spindle has a male 33JT projecting from it, as opposed to a Morse socket... If it is the male 33 JT, & you plan to keep that chuck on it, Loctite would be OK.. One trick to try first... Get some fine lapping compound, & lap the chuck taper on to the spindle taper, clean it well , then using a soft hammer , tap it on, & see if it will stay... If that fails, then try the loctite... BTW, try to keep lapping compound out of the spindle nose bearing... HTH

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landlord7012

11-30-2005 18:39:43




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 Re: Drill chuck falls out in reply to Nifty50, 11-30-2005 17:06:13  
Keith has sound advice. Loctite will make it difficult if not impossible to remove if you want to use other morse attachments or do repairs. Make sure the ID and OD tapers are clean and burr free and give it a tap to seat it (well maintained morse tapers will seat themselves with light hand pressure).

Safety First, ll



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Tim B MA

12-01-2005 09:12:58




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 Re: Drill chuck falls out in reply to landlord7012, 11-30-2005 18:39:43  
What other accessories do they make for Morse tapers on drill presses? I did a quick Google and did not see anything.



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landlord7012

12-01-2005 16:45:59




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 Re: Drill chuck falls out in reply to Tim B MA, 12-01-2005 09:12:58  
Split holders for straight shank tools such as drills, reamers, countersinks, counterbores and taps. Sometimes taller work pcs require clearance that is lost by using a chuck. Tap-matic makes a reversing tap head (not for your average home repair job) which utilizes morse taper as well.

ll



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TimV

12-01-2005 11:03:24




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 Re: Drill chuck falls out in reply to Tim B MA, 12-01-2005 09:12:58  
TimB: Many larger drills have a Morse taper and fit directly into the shaft in place of a chuck. For the average homeowner, the chances of needing to remove the chuck are somewhere around zero, which is why Loctite will work fine for the majority of users. A quick application of heat will remove the Loctite, should that ever become necessary. A well-crafted Morse taper on both the chuck and spindle should not need any additional holding persuasion, but most cheap drill presses are not known for the precision of their components....

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Tim B From MA

12-02-2005 09:52:04




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 Re: Drill chuck falls out in reply to TimV, 12-01-2005 11:03:24  
Tim, Landlord,

Thanks.



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Keith-OR

11-30-2005 18:07:21




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 Re: Drill chuck falls out in reply to Nifty50, 11-30-2005 17:06:13  
DON'T USE LOCKTITE!! Nifty50, the chuck with jacops taper is made to be removed from the drill press arbor. At the top of your chuck the tapered shaft should look like a large flat blade screw driver this should be approximately 1/4 wide. This portion need to line up with the slot in the main shaft, you will need to turn handle down as to see this on your drill press. Make sure when you insert the chuck into shaft of press you see the machined end line up in the sloted hole in the main shaft. After which either tap your chuck on bottom or crank it down onto a block of wood applying pressure as to force it up a little into your Morse taper. These chucks are made to be removed to use other drill attachments. when I go out to the shop will try to get some pictures of slot in drill press arbor...HTH

Keith

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nifty50

12-01-2005 13:48:54




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 Re: Drill chuck falls out in reply to Keith-OR, 11-30-2005 18:07:21  
Hello Keith,
Thank you for your advice.
I am trying to follow what you are telling me, but I don't see what you say.
My JT33 is a female chuck with a tapered hole on top that is perfectly smooth & round. There is no: �At the top of your chuck the tapered shaft should look like a large flat blade screw driver this should be approximately 1/4 wide.�

The main shaft on the drill press does not have a slot in it, I don't see anything to line up: �Make sure when you insert the chuck into shaft of press you see the machined end line up in the slotted hole in the main shaft�.

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Davis in SC

12-01-2005 18:37:53




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 Re: Drill chuck falls out in reply to nifty50, 12-01-2005 13:48:54  
Nifty, that was my point above... 33JT , the male part protrudes from the spindle, tapered hole is in the chuck... Right ??? If you need loctite, I see no reson not to use it... Now if it had been a Morse Socket, I would be hesitant to use Loctite .....



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e

11-30-2005 18:04:15




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 Re: Drill chuck falls out in reply to Nifty50, 11-30-2005 17:06:13  
Loc-tite is the key...242(medium) should be fine. Clean the mating surfaces good with brake cleaner and a scrubby pad. Tap them together and let them sit for a day....make sure the chuck jaws are retracted before tapping with a mallet.



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MAC,IL

11-30-2005 17:32:19




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 Re: Drill chuck falls out in reply to Nifty50, 11-30-2005 17:06:13  
Clean mating surfaces. Apply locktite and press back on really good. Fixed mine that way.



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TimV

11-30-2005 17:11:00




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 Re: Drill chuck falls out in reply to Nifty50, 11-30-2005 17:06:13  
This has been covered a few times--you may want to check the archives for more tips. In my case, when my cheapie China-made drill press did this, I put on a bit of Loc-tite, waited overnight, and it"s held for 3+ years now.



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