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Delta 12" drill press problem

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Forum topic by Betsy posted 08-16-2009 04:39 AM 1431 views 0 times favorited 12 replies Add to Favorites Watch
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Betsy

3338 posts in 3357 days


08-16-2009 04:39 AM

Topic tags/keywords: drill press chuck

I’ve visited the Delta site and have not found a good solution to this problem. So I figure I’d ask here as well as send them a message to see if I can get some help.

My 12” table top drill press seems to like parting ways with the chuck—- while it’s spinning of course. This is the fourth time it’s happened. Each time while using a largish forstner bit. I don’t think the size of the bit matters – it’s just coincidence that each time I was using a large bit. It’s a bit disconcerting when your chuck and bit come flying at you while you are in the process of drilling a hole.

Now the chuck is just a push on fit – pushed on with help of a rubber mallet. That’s how it’s assembled and there are no set screws, etc to deal with.

Anyway—- how do I get this to stop happening? I’ve made sure the spindle and the chuck are clean and dry, there don’t appear to be any defects that I see on the chuck—- but it just still comes off.

Any suggestions would be appreciated.

-- "Our past judges our present." JFK - 1962; American Heritage Magazine


12 replies so far

View Karson's profile

Karson

35035 posts in 3862 days


#1 posted 08-16-2009 04:45 AM

Clean out the inside of the taper on the chuck and the quill. Then use a wooden block hammer to tap it on. It should stick.

Your large forstner bit is putting a lot of pressure on the friction fit.

-- I've been blessed with a father who liked to tinker in wood, and a wife who lets me tinker in wood. Southern Delaware soon moving to Virginia karsonwm@gmail.com †

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Betsy

3338 posts in 3357 days


#2 posted 08-16-2009 04:47 AM

What would you suggest cleaning it with other than just a clean rag?

-- "Our past judges our present." JFK - 1962; American Heritage Magazine

View papadan's profile

papadan

1174 posts in 2829 days


#3 posted 08-16-2009 05:08 AM

Betsy, you can use a little lighter fluid or mineral spirits(paint thinner) to clean it with. I agree with a little harder hammer than the rubber mallet. I use a brass hammer to set my morse tapers with.

-- Carpenter assembles with hands, Designer builds with brains, Artist creates with heart!

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a1Jim

115202 posts in 3038 days


#4 posted 08-16-2009 05:36 AM

It may be possible that you need a new chuck if the cleaning doesn’t work . One of students had the same problem and the problem was she didn’t have enough strength to tighten the chuck well enough with the chuck key, How we solved it was to have her use a small piece of 3/8 pipe over the chuck key as a type of cheater bar to tighten in more secure.

-- http://artisticwoodstudio.com Custom furniture

View CharlieM1958's profile

CharlieM1958

16241 posts in 3679 days


#5 posted 08-16-2009 05:38 AM

Ditto what Karson and papadan said. Be sure not to apply too much pressure on that bit. I think it is digging in and breaking the friction fit, as Karson mentioned.

-- Charlie M. "Woodworking - patience = firewood"

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Betsy

3338 posts in 3357 days


#6 posted 08-16-2009 05:54 AM

Thanks guys. I’m going to give it another go in the morning.

Jim – I’ve had to use those cheater bars also. I’m not proud – I’ll use any tool I can to get to where I need to be!

Thanks again for the help. I’ll let you know how I get along.

-- "Our past judges our present." JFK - 1962; American Heritage Magazine

View TopamaxSurvivor's profile

TopamaxSurvivor

17654 posts in 3137 days


#7 posted 08-16-2009 08:51 AM

You might try a bit of blue locktite if all else fails.

-- Bob in WW ~ "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

View 45acpbuilder's profile

45acpbuilder

49 posts in 2674 days


#8 posted 08-16-2009 06:44 PM

DO NOT USE LOCTITE!!!! It will “sleeve” the taper and it won’t ever lock up. Use a good wire taper brush and acetone or some other oilless solvent. You can also get a taper reamer at Enco or other machine tool suppliers. The taper socket and arbor must be absolutely pristine in order to facilitate the taper lock-up. Use a brass mallet to seat the chuck. Don’t abuse it but do give it a good rap. Any chatter from forstner bits will tend to shake the chuck loose. A tap every now and then is a good idea.

-- M1911BLDR

View Vjeko's profile

Vjeko

135 posts in 2875 days


#9 posted 08-16-2009 07:31 PM

Hi Betsy,
If the chuck is falling out, you didn’t tap it in hard enough and/or you didn’t align it
with the taper well enough (it should slide in straight but do it carefully).
I don’t think it has anything to do with it not being clean – I wouldn’t bother with
any cleaning other than cleaning it with a rag if it has been lying around/has dust etc.
on it.

Make sure the “teeth” that grab the drill are in the chuck before doing the following(teeth not showing outside).Push the chuck in the taper, put a piece of wood below the chuck (this is used so the chuck is not damaged) and tap it in with a normal metal hammer- it shouldn’t be hard tapping but a few good taps
so it is secure.

If you are using a key to tighten (not a hand tightened chuck), I usually tighten in one hole and then
turn chuck and tighten in another. You shouldn’t need to be tightening hard – if so, there
is something wrong with the chuck or drill bit.

-- Vjeko Balas - Croatia

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TopamaxSurvivor

17654 posts in 3137 days


#10 posted 08-16-2009 07:45 PM

Maybe I’d better stick to electrical and wood :-))

-- Bob in WW ~ "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

View Betsy's profile

Betsy

3338 posts in 3357 days


#11 posted 08-16-2009 11:47 PM

Thanks for the help guys. I took a good small brass brush to the inside – there was a little gunk inside – but not much. I used the block of wood and a mallet and seated it on. So far it’s stood the test for the first 10 holes I need to cut. Hopefully it will stay on. Sure was a bit, ummmm, unnerving to have the chuck with the bit fly off at me!

Thanks again.

-- "Our past judges our present." JFK - 1962; American Heritage Magazine

View Karson's profile

Karson

35035 posts in 3862 days


#12 posted 08-17-2009 12:08 AM

Great Betsy. Glad its working out.

-- I've been blessed with a father who liked to tinker in wood, and a wife who lets me tinker in wood. Southern Delaware soon moving to Virginia karsonwm@gmail.com †

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