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Thread: loose chuck
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3rd September 2010, 05:36 PM #1New Member
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loose chuck
Hello.
I have one of those cheapie drill presses, an inexpensive Ryobi bought at Bunnings a few years ago.
It has a problem. The chuck is loose. Or maybe (if my terminology is correct) it's better to say that the spindle and chuck don't have a tight fit. Sometimes it simply drops out - needless to say, this isn't very safe either.
At this time, I'd prefer not to buy a new or better drill press - there are other tools I need to invest my money into, and a drill press isn't one of tools that I need to be or very high quality and/or specialised. I also can't return this machine because I've owned it for years.
And so my question is simple - how would you go about installing this chuck very tightly so that it no longer drops out? Is there a particular tape or adhesive that I could apply to make a tighter fit, etc?
Many thanks to anyone who can give any advice or suggestions.
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3rd September 2010, 05:48 PM #2
One thing you could try is make sure both the Morse Taper on the chuck and inside the quill are absolutely clean. Try cleaning with metho. Failing that you could perhaps smear some CA or Super Glue or some epoxy in there. Seeing it is a elcheapo drill it couldn't do any harm.
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3rd September 2010, 06:47 PM #3SENIOR MEMBER
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Mine falls out all the time. I just bang it back in with a piece of timber.
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3rd September 2010, 09:52 PM #4Member
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Loose chuck
When the chuck falls off next time put it in an old saucepan and boil it for about 10 minutes, put on a thick clove and put the chuck on while it is very hot, give it a hit with a piece of solid hard wood then let it cool before using. The boiling water will swell the tapered hole and as it cools it should grab the shaft.
Rowley.
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4th September 2010, 09:11 AM #5Senior Member
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If all the above dont work...when the chuck is off, take a needle punch and "pein" the shaft in half a dozen places using a metal hammer. The small indents you make with the punch causes a dimple effect and slightly swells the shaft. Replace the chuck with a piece of timber and the same hammer....Regards,.........AL
If your not confused you dont know whats going on!
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4th September 2010, 09:56 AM #6New Member
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thanks
Thanks guys. Some good ideas in there. I'll work on this later this weekend.
Bern
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4th September 2010, 03:11 PM #7
The most common problem is that when the chuck fell out it got a small bruise on the taper. This makes it fall out easier and more bruises. These create high spots on the taper and thus a catch 22.
To fix this
Remove the Chuck , clean the morse taper as Barry said with metho
Let it dry mark the taper with bearing blue or if you don't have any with chalk , put it back in then remove , note where the chalk has been removed as this is where its touching
With a small smooth hand file or a file with a strip of emery paper over it carefully and gently remove any high spots
Repeat till your getting a good coverage of the taper touching the inner taper
For a proper fit you need 80% but 40% will do
Its easier to do a proper repair and regardless of the cost of the drill , with good maintenance you can still get a good result
Buying a good drill press won't stop you accidentally dropping the chuck and you back where you startedAshore
The trouble with life is there's no background music.
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11th September 2010, 04:44 AM #8Tool collector
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Totally agree with Ashore.
the slighest dirt or damage is enough to compromise a proper taper fitting, provided both tapered parts are crafted in exactly the same angles (in which case a proper fit is impossible to begin with). Inspect both surfaces and clean them. Cure only the protruding rims of bruises or indentations with a fine file, do not sand or grind the entire cone surface. It is good practice to store tapered chucks or tapered insert type drill bits with a light coat of oil to prevent rust, but prior to use all grease or oil should be removed thoroughly from tapered fittings.
Try to avoid excessive force during beating the chuck home on its spindle. Hardwood or a wooden or plastic hammer is tolerable but the merciless impact of hitting something metal on the chuck metal will wreck the drill's spindle bearings, especially those of Chinese budget machines.
greetings
gerhard
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