CVA Toolroom Lathe - Cushman 4 Jaw Chuck

My CVA lathe came with a few accessories including this 4 Jaw Independent chuck.


It's 6 inch diameter and mounted on a D1-3 backplate.
The body (excluding backplate) is 2-3/8" deep. Jaws 0.980" wide

Would a Cushman 6" 4 Jaw have been standard on a 10EE?
Notice that this one says 'Manufactured by CVA' which suggests its a copy made under license.



If its age is the same as the lathe, 62 years, it's not in bad condition, though there are some bruises on the outside.

Wow. Looks like it's never been used.

My Monarch 60 came with Cushman chucks and I believe they are original but just guessing. I would expect a 6" scroll and 8" independent to have been ordered if original but again, not real clue.

Dave

CarbideTip said:

Would a Cushman 6" 4 Jaw have been standard on a 10EE?

Click to expand...

According to several of the brochures, chucks were not part of the standard equipment supplied with a 10EE. Standard equipment included 10" face plate, dog drive plate, rests, etc.. Monarch would supply chucks as extra equipment, but they don't mention what brand. When supplied, chucks had the serial number of the machine stamped on the back.

I have one of those on my small(er) lathe right now in D1-4. it was actually unused when I found it at Victor Machine's original location on Lafayette St. in Manhattan after they moved to Brooklyn. it was just laying on the floor, pretty gunked up. they left a lot for the scrappers.

those are exceptionally heavy duty for their size. .982 wide jaws for a 6" chuck, downside is you can't grip small stuff, but that's why one needs at least 2 4 jaw chucks.. personally I think 4 or 5 is about right.
I'd post a pic but it looks just like that, but with more of the original finish.

thank you Victor Machine!

When I got my 1977 10EE in early 2002 it included a 6" 3 jaw and an 8" 4 Jaw, both Cushman, both direct mount. Neither have what looks like a 10EE serial number. The original order lists a 6" 3 jaw chuck, "light duty, steel body", brand not given. The 8" 4 jaw is not listed. I expect the original owner, Electro-Mechanical Division of Northrop Corporation, had more than one 10EE and spindle nose accessories may have been switched around. I got lucky getting the 8" 4 jaw. And the 6" 3 jaw may well not be the one that came with the lathe originally. The dog plate I got has a 10EE serial number; it doesn't match my 10EE.

See: https://www.practicalmachinist.com/vb/monarch-lathes/factory-rebuild-10ee-162610/
Post No. 3 in this 2008 thread describes Monarch's remanufacturing process for the 10EE. Here it notes they can supply Pratt-Burnerd chucks, 6" and 8" 4 jaw independent and 6" and 8" 3 jaw.

I remember seeing "old lore" on this forum stating that back in the day Monarch would supply Skinner chucks. Don't know when Skinner ceased to be. I have a catalog, probably 1966, showing Skinner as a division of Cushman, along with Horton and Union.

David

Thanks for all the replies.
@old_dave - Yes I would have expected a larger than 6" 4J chuck on a lathe of this size. My 10" (swing) x 18" Colchester Bantam has an 8" light duty 4J which seems a more appropriate size. Although I bought this 8" chuck new, it is exactly what Colchester offered for the machine back in the day. The Colchester is also D1-3 so I will keep the best of the chucks and this will be one of them.

@cyanidekid - I agree this is a heavy chuck for such a small overall size. Because the jaws are so chunky it won't grip anything much smaller than 1/2".

What puzzles me is why CVA would go to the trouble of making these 6" 4J chucks when the only center lathes they made were the 10EE copies.
Perhaps they sold a range of chucks for fitting to other lathes. @tonylathes - can you help here?

CarbideTip said:

What puzzles me is why CVA would go to the trouble of making these 6" 4J chucks when the only center lathes they made were the 10EE copies.
Perhaps they sold a range of chucks for fitting to other lathes. @tonylathes - can you help here?

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yup, they were (are they still around?) absolutely in the tooling business. in fact in this country the chucks
are far more common than the lathes

mine just says CVA, no mention of Cushman on the medallion (or anywhere else). I presume the deal between them
expired or otherwise was dissolved.

BTW...those tags are perhaps the nicest I've seen,
don't know how they hold up, but they sure are lovely.

P.S. thinking about it, this style of chuck makes a lot of sense for a 10EE, for smaller work you were probably using collets
to maximize the accuracy potential of the machine, but to utilize its power and rigidity within its working envelope this seems ideal.
Monarch people, is this like the original 4 jaw chucks supplied?

cyanidekid said:

yup, they were (are they still around?) absolutely in the tooling business. in fact in this country the chucks
are far more common than the lathes

Click to expand...

No, they don't exist any more. Kearney and Trecker bought into CVA in the mid 1950's and took over completely in the 1960's.
The factory then produced lots of K&T designed mills. AFAIK they still produced the CVA Toolroom lathe but the ID plate changed to reflect the new owners.
See below. First one is mine, next just 9 machines later. Unfortunately the later plates don't show date of manufacture.
Third plate - looks like they'd outsourced manufacture completely.







Interesting that the chucks were exported to the US.
They are not common over here compared to Burnerd or Pratt.