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Jammed keyless chuck

DPittman

DPittman

Ultra Member
Anyone know of any tricks to loosening off a keyless chuck. I was using a hole saw and it got it so damn tight I can't get it off. The chuck let go of the Jacob's taper and I've got it in the vice and I have a chuck wrench but no movement! I've had these dang whole saws do that before on me but never this tight. 20210416_150214.jpg
 
Well I've got a 2ft snipe on the chuck wrench and things are just on the verge of snapping. A pipe wrench will Mar up the chuck badly but won't offer anything over what I've got now. Hmmnnnn.....
 
@6.5 Fan beat me to the question.
I have a chuck like that. Wondering if it's possible to loosen the top ring.
Or conversely, can you clamp the holesaw in a vise and run the press/mill in reverse?
 
David_R8 said:
@6.5 Fan beat me to the question.
I have a chuck like that. Wondering if it's possible to loosen the top ring.
Or conversely, can you clamp the holesaw in a vise and run the press/mill in reverse?
Click to expand...
Ha ha I just figured it out myself and came back to post the SECRET! Loosen the top ring!!! You are right DR8.
My drill does not have reverse....I'm working on the dang project now to get the option of reverse with the vfd. Ha ha. 20210416_153045.jpg
 
A Vise Grip Chain Wrench has saved me many times. Also, I use a Silver Sharpie to put directional arrows on everything these days. I find when I am frustrated my brain slows down, stops, and occasionally reverses. The arrows don't stop me from swearing, but do save my pride.

1618609765937.webp
 
Good job getting it off.

DPittman said:
Ha ha I just figured it out myself and came back to post the SECRET! Loosen the top ring!!!
Click to expand...

Use two pin spanners, one in the top hole, one in the bottom. That’s what the holes in the chuck are for. Works every time.
 
RobinHood said:
Good job getting it off.



Use two pin spanners, one in the top hole, one in the bottom. That’s what the holes in the chuck are for. Works every time.
Click to expand...
The top hole in mine is not much of a hole as there is a set screw in it that holds the that collar on. I don't think it would hold a pin of a spanner
 
Right, I have that wrong. The lower hole is the one I use a pin spanner in while the chuck is still in the lathe/mill. Sorry for the confusion.
 
RobinHood said:
Right, I have that wrong. The lower hole is the one I use a pin spanner in while the chuck is still in the lathe/mill. Sorry for the confusion.
Click to expand...
Yes that's what I did with my pin spanner but then the chuck would not stay in the Jacob's taper so I held the hole saw in my vise and then reefed on the chuck with the pin spanner until it felt like something was going to bend or break and still no loosening up. I then took a rubber strap to that top collar as I didn't want to start with a pipe wrench yet. I was expecting to break the rubber strap but that is what broke the grip loose. And it only took a fraction of what I was using with the pin spanner on the main body. Now I know.
 
Well it turns out my chuck is buggered afterall. I thought I had it but I went to tighten it up today and just get it nice and snug and then it slips. Something gave that should not have. Dang
 
Well that bites mightily! I'd pull it apart and see what's going on. They are simple devices.
 
David_R8 said:
Well that bites mightily! I'd pull it apart and see what's going on. They are simple devices.
Click to expand...
I'm working on it right now. And I'll be darned if I can figure out why it is pooched. I think it has to be the threads on the center shaft that moves the jaws up and down. It appears fine until the last bit of tightening and then it slips.
 
Shoot us some pics of the pieces. One of us may have experience with the guts of these things.
 
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