Stuck Drill chuck in Mill

The mill came new with the mt chuck installed ?.
 
Liquid wrench has worked well for me, but I've heard the 50/50 ATF (automatic transmission fluid) and acetone is even better
Try both, and be generous. Be careful with the hammering as others have said.
Perhaps you could rig up a puller with some threaded rod and some pieces of steel?
Mark
ps yes there's some pretty wild stuff out there on the net- Better advice here for sure
 
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Liquid nitrogen might be a little hard to come by, but you could take the chuck to -111 degrees F by soaking it in an alcohol/dry ice mix, with that much cold mass, it should chill the stub enough to come out.
 
No disrespect but you seem to be repeating a mistake. Once you've got the chuck out be gentle when tightening the drawbar forever after, Jacobs tapers just need to be snugged up, finger tight then just a touch with the wrench. If you overtighten them, you are going to have all sorts of problems getting them out.
 
There was a thread on MadModder a few years back where someone had the same problem, I put up a drawing of a set of taper wedges Id made for the job and they worked for the guy - if you can make some they'd be a way out?

Wow, it was six years ago, doesn't time fly when you're having fun? https://madmodder.net/index.php/topic,6881.msg74587.html#msg74587 and read on a few pages!

Dave H. (the other one)
 
Bob Korves suggestion of supporting the spindle is a good one, a block of wood with a hole in it would do.
Shallow tapers hold very well and the single biggest problem is people cranking the crap out of a drawbar. Vehicle ball joints have the same symptoms and mechanics swear mightily at the idiots who overtighten them. No way will oil or anything else pass the joint when this happens.
Support as Bob suggested make a punch that screws in like Chipper5783 suggested and whallop with a BIG hammer.
Dredb nailed what is the likely cause of your problem. There would be few who have not 'been there,done that' but once learned not quickly forgotten.
One other thing tapers should be fitted dry, I've heard some people say a coat of light oil - this is guaranteed to cause slipage. A roll of toilet paper is handy for wiping down the plug and cleaning the socket.
 
No way will oil or anything else pass the joint when this happens.

I am finding that out as well. After days of applying penetrating oil and trying to allow it to seep in, things are still fail here. That damn chuck is so jammed in there, no go.

I feel it's going to be jammed in there for life at this point, LOL.

By the way, I've included a pic of the top of the mill with the protective cap removed. I can unscrew the drawbar itself ok, but I tried to remove the spanner nut on the top as well. I am finding this also impossible. I can turn it a few degrees one way or the other, but then it jams as well. Is that actually normal? I am finding myself more and more confused with this mill. I don't know which way is clockwise, or up or down anymore... lol

And ontop of these issues, I have even more issues... For example, my headsock still jams at certain points when moving it for drilling. I had a hunch, and after checking it seems to always jam at 360 deg locations when pulling the handlebars. I'm suspect some disgruntled slave in china may have left some screw somewhere in the gears. I'm going to have to do a through examination of that too. It's making my mill unusable for even drilling as it jams all the time (murphy's law) right when I'm drilling. Almost as though someone specially designed it to jam there too. LOL

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Update!

So, after taking off the headstock for now... one mystery is solved.

It wasn't a screw stuck in some gear-slot, turns out one of the teeth/spokes seems to have literally torn itself away and folded in on itself. It may be a bit difficult to see this in attached photo. It seems the manufacturer was smart enough to avoid plastic for that, but the metal they used just wasn't up for the task it was designed to do unfortunately.

Also I noticed there was no grease or lubrication inside the transmission at all, so I sprayed some chain-lube into there for now.

---

That said, since I now have two visually confirmed damaged pieces, I will check in with their head office for warranty replacements... Will keep this thread updated on how THAT goes. All one can do at this point is laugh and play the wait game I suppose.

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