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measuring for a new lathe chuck

383 240z

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Dec 4, 2006
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Findley Twp. Allegheny Co.
I am looking for a new 4 jaw chuck for my 13x40 lathe. I have a 6" Bison 3 jaw on it now. The problem is the previous owner was a putz. It has a cam-loc spindle on it. He however knew better, he drilled and tapped 3 holes in it, on a small bolt circle. Then mounted an adapter plate to the spindle that had a nose that was to small to fit the chuck. So that got drilled and tapped for another adapter plate this one with a larger bolt circle and the proper sized nose, the chuck is then bolted to that. I hate **** like this. It however has been working and is running true, so I left it alone. Only problem I have run into is that by the time I mount the work, I'm to far out to use the gap in my bed.

Well I have a job that I need to mount a face plate and make a trepanning cut into a 8"x8"x1" steel plate. The recess will be 4.800 OD 4.250 ID and .500 deep. Small radius on both corners of the cut. More on that later.

Anyways, I was going to make a faceplate and mount it to the small bolt circle in my spindle. Then I decided to blow some cash and pick up a new 4 jaw, maybe a nice 8" version. Then I could chuck it up make my cut.

The lathe is a 1990's Enco 13-1020 (I think). I called Enco, they have no idea what size cam loc the spindle has. Most lathes of that size they make were fitted D-1 4 cam loc's I however am not willing to drop $400 on a chuck, shipping it 1/2 way across the country only to find that it does not fit.

I have been looking for drawings with dimensions so I could measure what I have and I can't come up with anything.

Anything you guys can show me, or if you know how to measure for this would be very helpful. Keith
 
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APEowner

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Oct 2, 2009
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Sunny, New Mexico
Hmm. I expected to find that information in the Machinery's handbook but I just looked and no joy. I know I've seen that somewhere, perhaps on the Bison site?
 
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383 240z

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Dec 4, 2006
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Findley Twp. Allegheny Co.
The plan is to sell off the 6" Bison, to fund a new 3 jaw. I won't be paying what they are asking for new or gently used Bisons. People seem to think they are made of gold. Keith
 
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383 240z

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Joined
Dec 4, 2006
Messages
4,295
Location
Findley Twp. Allegheny Co.
Been thinking about these:
3 Jaw
http://www.ebay.com/itm/SHARS-8-3-j...6?pt=BI_Tool_Work_Holding&hash=item519eec2fb8
4 Jaw
http://www.ebay.com/itm/8-4-jaw-ind...5?pt=BI_Tool_Work_Holding&hash=item338f3f3acd

I know they are Chinese junk, however before you jump on the anti-Chinese bandwagon. I recently talked with a well respected machinist on this board, his new Chinese vise has less then .0001 variance, mine came up with the same tolerance. I also measured my buddies 8" rotary table. I could find no runout in it!!!! I was using a .0001 indicator. Some of the stuff coming over the pond is actually pretty decent and it's getting better. Keith
 

kazlx

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Oct 30, 2012
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Location
Tustin, CA
No complaints here. My buddy just bought a new 4 jaw for his South Bend 16 only to find the headstock bearings are worn. Chuck works great though.
 
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