Installing a tapered chuck

I had a customer ask me this today, Tommy gave me a good rundown on this installation. I did some further research because alot of people complain that the chuck is always falling off and came across these suggestions on rec.woodworking -



Newsgroups: rec.woodworking
From: John van Veen -
Date: 1996/09/29
Subject: delta drill press chuck falls out.


Does anyone have any suggestions on how to keep a 1/2 chuck from falling out of a delta drill press. Just finished a great project and finishing touch was to drill out a tennon. Soon as I finished the chuck fell out and bit hit wood :-( When cutting plugs the darn thing keeps coming off and wrecking wood. I have tried a rubber mallet and pressing on using the drills arm tension. Should the shaft be dry, or some kind of sticking (breakable) adhesive. I may want to get it off someday Happens to often. Any ideas.
John Lehman
Sep 30 1996, 12:00 am
Newsgroups: rec.woodworking
From: j...@cris.com (John Lehman) - Date: 1996/09/30
Subject: Re: delta drill press chuck falls out.


On Sun, 29 Sep 1996 22:07:07 +0000, John van Veen
wrote: SNIP
>Does anyone have any suggestions on how to keep a 1/2 chuck from falling >out of a delta drill press. Just finished a great project and finishing I had the same problem with my drill press a while back. I finaly fixed it by lightly sanding ,with emery cloth, both the inside and outside taper. I think what happens is that small amounts of dirt or rust get on the taper and it doesn't seat properly. The sanding will also roughs the surface up slightly and help it stick a little better.
Good Luck John Lehman
john langley
Sep 30 1996, 12:00 am
Newsgroups: rec.woodworking
From: jlang...@world.std.com (john langley) -
Date: 1996/09/30
Subject: Re: delta drill press chuck falls out.


John van Veen wrote:
>Does anyone have any suggestions on how to keep a 1/2 chuck from falling >out of a delta drill press. Just finished a great project and finishing >touch was to drill out a tennon. Soon as I finished the chuck fell out >and bit hit wood :-( >When cutting plugs the darn thing keeps coming off and wrecking wood. I >have tried a rubber mallet and pressing on using the drills arm tension. >Should the shaft be dry, or some kind of sticking (breakable) adhesive. >I may want to get it off someday Happens to often. Any ideas. John,
Sounds like the Morse taper which connects the spindle to the chuck is garged up. In all the Delta DP's I have seen, there are really two tapers to worry about, one into the chuck itself (often a #33 taper) and another in the end of the spindle (usually a #1 or #2) with a short adapter in between. They hold everything together by friction and if they slip it is usually because some sort of crud has gotten on the mating surfaces. I have found that carefully cleaning up the surfaces using acetone (no nearby open flames please) usually restores a tight fit. After careful cleaning, fit the chuck into the spindle, open it all the way (to withdraw the jaws) and give the bottom of the chuck a sharp whack with a rawhide mallet or the like to seat the tapers.
Sometimes under severe abuse the surfaces will get chewed up to the point where they are too rough to hold. In that case you can usually replace the male part of the taper and have a machine shop ream the female part.
regards
john langley
paul royko
Sep 30 1996, 12:00 am
Newsgroups: rec.woodworking
From: r...@astral.magic.ca (paul royko) -
Date: 1996/09/30
Subject: Re: delta drill press chuck falls out.



In article <324fbf6a.2251...@news.cris.com>, j...@cris.com (John Lehman) wrote: > On Sun, 29 Sep 1996 22:07:07 +0000, John van Veen > wrote: > SNIP > >Does anyone have any suggestions on how to keep a 1/2 chuck from falling > >out of a delta drill press. Just finished a great project and finishing
> I had the same problem with my drill press a while back. I finaly > fixed it by lightly sanding ,with emery cloth, both the inside and > outside taper. I think what happens is that small amounts of dirt or > rust get on the taper and it doesn't seat properly. The sanding will > also roughs the surface up slightly and help it stick a little better.
> Good Luck > John Lehman I found with my Delta 14" that the problem was the grease used in shipping. Once I cleaned it off with a rag moistened with paint thinner, the problem went away.
-- paul royko Toronto, Canada
Life needs a Command-Z key.
" noWrap width="1%" bgColor=#2e7044>P Congdon
Sep 30 1996, 12:00 am
Newsgroups: rec.woodworking
From: P Congdon -
Date: 1996/09/30
Subject: Re: delta drill press chuck falls out.


The Morse taper shank on the drill chuck must be absolutely clean when it is inserted into the tapered holder. This includes removing all grease and oil. Obviously the mating surface of the holder must likewise be cleaned. After wiping both surfaces clean wipe them again using a solvent. I use xylol or tolulene.
Regards, Phil


John van Veen wrote:
> Does anyone have any suggestions on how to keep a 1/2 chuck from falling > out of a delta drill press. Just finished a great project and finishing > touch was to drill out a tennon. Soon as I finished the chuck fell out > and bit hit wood :-( > When cutting plugs the darn thing keeps coming off and wrecking wood. I > have tried a rubber mallet and pressing on using the drills arm tension. > Should the shaft be dry, or some kind of sticking (breakable) adhesive. > I may want to get it off someday Happens to often. Any ideas.
" noWrap width="1%" bgColor=#d66103>Craig Sterrett
Oct 3 1996, 12:00 am
Newsgroups: rec.woodworking
From: Craig_Sterr...@ccm.al.intel.com (Craig Sterrett) -
Date: 1996/10/03
Subject: Re: delta drill press chuck falls out.

Here is a note from http://www.jettools.com/ on the subject
Q: How do I keep the arbor and chuck from falling out of the drill press? A: Clean the chuck taper, the arbor and the spindle taper with mineral spirits, white glove clean. Open the chuck as if to hold the largest drill bit of its capacity (jaws retracted). Install arbor in chuck, use a block of wood, and small hammer, to seat the arbor in the chuck. Install chuck/arbor into the spindle using the technique one firm (but not damaging) blow with the hammer. That should do it.In article <324ef304....@north.nsis.com>, jvanv...@north.nsis.com says...


>Does anyone have any suggestions on how to keep a 1/2 chuck from falling >out of a delta drill press. Just finished a great project and finishing >touch was to drill out a tennon. Soon as I finished the chuck fell out >and bit hit wood :-( >When cutting plugs the darn thing keeps coming off and wrecking wood. I >have tried a rubber mallet and pressing on using the drills arm tension. >Should the shaft be dry, or some kind of sticking (breakable) adhesive. >I may want to get it off someday Happens to often. Any ideas.
" noWrap width="1%" bgColor=#512dbd>Gary
Oct 4 1996, 12:00 am
Newsgroups: rec.woodworking
From: g.p...@worldnet.att.net (Gary) -
Date: 1996/10/04
Subject: Re: delta drill press chuck falls out.

John,
Mine fell out too once when I was using the mortising attachment to the drill press. Get out your Delta instruction booklet and follow the directions carefully--that's what I did and the chuck stayed put. I think the shaft and hole must be clean, and avoid touching it with your fingers after cleaning it. I often wondered what magic is it that the chuck stays in there _most_ of the time---must be some kind of "friction fit," I guess.
" noWrap width="1%" bgColor=#c5a200>Jeff Gorman
Oct 4 1996, 12:00 am Newsgroups: rec.woodworking
From: J...@millard.demon.co.uk (Jeff Gorman) -
Date: 1996/10/04
Subject: Re: delta drill press chuck falls out.


On Fri, 04 Oct 1996 01:53:18 GMT, Gary wrote: ~
Mine fell out too once when I was using the mortising attachment to the ~ drill press. Get out your Delta instruction booklet and follow the ~ directions carefully--that's what I did and the chuck stayed put. I ~ think the shaft and hole must be clean, and avoid touching it with your ~ fingers after cleaning it. I often wondered what magic is it that the ~ chuck stays in there _most_ of the time---must be some kind of "friction ~ fit," I guess .
I had the same problem with a Twaiwanese import. Both the chuck arbor then the spindle were changed, but the problem continued.
I eventually traced this to a misalignment of the chisel holder. If this is not accurately centred with the chuck, lateral forces develop and cause the chuck to fall out.
This reinforces the advice that milling on a drilling machine is a bad thing since they are not designed for such loads. A proper milling machine has different arbor tapers and the chuck is held in place by a drawbar that passes down the centre of the spindle.
Jeff -- Jeff Gorman - West Yorkshire j...@millard.demon.co.uk
" noWrap width="1%" bgColor=#528d31>WOODDON
Oct 5 1996, 12:00 am Newsgroups: rec.woodworking
From: wood...@aol.com (WOODDON) - Date: 1996/10/05
Subject: Re: delta drill press chuck falls out.

The magic is a taper, the same thing that holds the chuck on a wood lathe. Clean both metal surfaces then apply a very light machine oil then wipe off the oil with a clean dry rag. let the oil dry a bit then slam the drill chuck into the sleeve with a fast upright movement and it should stay there for a long time. Wooddon
ANNE B. WATSON
Oct 6 1996, 12:00 am
Newsgroups: rec.woodworking
From: calla...@aztec.asu.edu (ANNE B. WATSON) -
Date: 1996/10/06
Subject: Re: delta drill press chuck falls out.

In a previous article, g.p...@worldnet.att.net (Gary) says:
>John,
>Mine fell out too once when I was using the mortising attachment to the >drill press. Get out your Delta instruction booklet and follow the >directions carefully--that's what I did and the chuck stayed put. I >think the shaft and hole must be clean, and avoid touching it with your >fingers after cleaning it. I often wondered what magic is it that the >chuck stays in there _most_ of the time---must be some kind of "friction >fit," I guess. Lug the chuck down to a metalworking supply store and buy the appropriate tapered reamer for it. Reamers are a hand tool, so turn off the drillpress insert the reamer and take one complete turn, using a wrench.
Cover tapered end of the chuck with machinest blueing, let dry, insert in shaft. The blueing should clean off where it is contacting the shaft. If it doesn't clean off, use the reamer again. Anne --
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Good luck with that!