Chuck with drawbar

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glycerine

glycerine

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Joined
Aug 7, 2009
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Fayetteville, NC
Where can I find a jacobs chuck with a drawbar? Are they usually sold together or is this something I need to look for separately?
 
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Jacobs chucks are pretty easy to find on their own. I would start here and contact JohnnyCNC. He sells a lot of lathe accessories (centers, chucks, bushings, etc).

As far as the drawbar, what I have typically seen is internal threads on the back of the Morse taper. You can go to HD/Lowes/What-have-you, and just get all-thread rod, some washers and a nut, and "make" the drawbar.

You'll want to make sure the taper this threading though. I have two chucks and neither are threaded, but I've never had a problem.

If you are using this in the tailstock though, I am not sure it will work, unless you don't want to advance the quill.

Good luck!
Chris
 
You can buy them on some sites, but you can make a draw bar real easily. My Jacobs chuck is a 1/4-20 thread so I took a piece of 1/4-20 rod that I bought at a hardware store. I cut a length long enough to go through my headstock and fully into the chuck body. I then turned a knob and expoxy it onto the end of the rod. Now when I use the chuck I simply thread the rod until the know tightens down against the headstock wheel. Probably cost me $1.50 and I have made them for other mandrels or chucks.
 
cbatzi01 said:
Jacobs chucks are pretty easy to find on their own. I would start here and contact JohnnyCNC. He sells a lot of lathe accessories (centers, chucks, bushings, etc).

As far as the drawbar, what I have typically seen is internal threads on the back of the Morse taper. You can go to HD/Lowes/What-have-you, and just get all-thread rod, some washers and a nut, and "make" the drawbar.

You'll want to make sure the taper this threading though. I have two chucks and neither are threaded, but I've never had a problem.

If you are using this in the tailstock though, I am not sure it will work, unless you don't want to advance the quill.

Good luck!
Chris
Click to expand...

Ok, that's a good point. When drilling on the lathe, do most people put the blank on the headstock end and the drill bit in the tailstock or vice versa?
 
nava1uni said:
You can buy them on some sites, but you can make a draw bar real easily. My Jacobs chuck is a 1/4-20 thread so I took a piece of 1/4-20 rod that I bought at a hardware store. I cut a length long enough to go through my headstock and fully into the chuck body. I then turned a knob and expoxy it onto the end of the rod. Now when I use the chuck I simply thread the rod until the know tightens down against the headstock wheel. Probably cost me $1.50 and I have made them for other mandrels or chucks.
Click to expand...

Ok. So do you mount your blank at the tailstock when drilling?
 
glycerine said:
And you don't have problems with the drill bit wobbling or anything?
Click to expand...
I just re-read this whole discussion. I think I see your confusion...you use a drawbar in the HEADSTOCK END..it keeps the chuck tight...on the tailstock end YOU DO NOT USE A DRAWBAAR...the pushing while drilling keeps it in the MT...hope I figured out your confusion & helped:confused:
 
mickr said:
I just re-read this whole discussion. I think I see your confusion...you use a drawbar in the HEADSTOCK END..it keeps the chuck tight...on the tailstock end YOU DO NOT USE A DRAWBAAR...the pushing while drilling keeps it in the MT...hope I figured out your confusion & helped:confused:
Click to expand...

Yes, I think I get it. When I think of the chuck attached to the headstock, I am thinking of the kind that screws onto the threads instead of using the morse taper hole, so I was not understanding why a draw bar would be needed at the headstock. I get it now. Thanks.
 
glycerine said:
Yes, I think I get it. When I think of the chuck attached to the headstock, I am thinking of the kind that screws onto the threads instead of using the morse taper hole, so I was not understanding why a draw bar would be needed at the headstock. I get it now. Thanks.
Click to expand...
You are welcome..just just as another thought..I have 2 chucks..one fits the MT very well and does not migrate out..the other will...you may never need a drawbar..I've not had one in 50 yrs of turning...I use a rubber mallet...make sure the chuck is seated well in MT then tap it with rubber mallet..has worked for me since pluto was a pup..good luck
 
mickr said:
You are welcome..just just as another thought..I have 2 chucks..one fits the MT very well and does not migrate out..the other will...you may never need a drawbar..I've not had one in 50 yrs of turning...I use a rubber mallet...make sure the chuck is seated well in MT then tap it with rubber mallet..has worked for me since pluto was a pup..good luck
Click to expand...

While not quite as experienced (pluto has had gray hair since I've been turning :biggrin:) I have never used a drawbar, I've only had a drill chuck come out of the tailstock once, and that was an operator error, not the fault of the chuck or the morse taper.
 
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