Chuck Too Big ?

[kingmt01]

I don't know what that lathe looks like. With removable ways it might work but if not it is likely to big. It could be just the ticket for a one off job tho. I needed a 4 jaw the other day that would hold a .250" hardened pin. My 4 jaw on my 14x40 was to big. So I grabbed the 6" 4 jaw from my 9x lathe & suck it in the big chuck. Took some indicating to get it as true as I needed but it worked a charm.

I was turning a arbor for a well worn drill chuck that a .250 pin wrapped in paper will just barely fit. I was quite proud of it when I finished. It only has .0041" total runout 2" from the chuck. As rough as the chuck looks I think that is impressive. It looks like it has been used as a hammer & was stuck tight when I got it.

Sorry I tend to run on talking past the answer sometimes.

 

[4GSR]

If he has one of the Rockwell lathes with a L-00 spindle nose, it will probably be fine. But if it is one of the much older models with the threaded spindle nose, no way!!!

 

[Wreck™Wreck]

My 16 inch lathe came with a 15 3/4 inch 4 jaw from the factory. Only complaint is it will only close to 1 inch so someday I'll pick up a smaller chuck for it. The weight of the chuck would have to be subtracted from the weight capacity of the lathe.
In my case the capacity at the spindle is 1000 pounds, the chuck weighs 140.

Greg

If you only do occasional hobby work buy a small 3 jaw that can be chucked in the large 4 jaw, this will allow you to adjust the runout of the three jaw and not have to change chucks as often, if making hundreds of parts in one setup this is not ideal unless you make a chuck key that extends beyond the larger chucks diameter.

 

[AaronD]

I have a Rockwell 11" with 6" Buck adjust tru and 8" 4 jaw. I couldn't imagine a 10" would be ideal. The lathe if L00 nose will handle it, just be mindful of clearance and rpm.

I had an 8" 4 jaw on a 9" South Bend once....I was not a fan, not to mention the belt slippage and concern of the threaded spindle.

 

[f350ca]

If you only do occasional hobby work buy a small 3 jaw that can be chucked in the large 4 jaw, this will allow you to adjust the runout of the three jaw and not have to change chucks as often, if making hundreds of parts in one setup this is not ideal unless you make a chuck key that extends beyond the larger chucks diameter.

I've done that once or twice but as you say a nuisance to get at the three jaw to tighten it. I was given a D!-8 mount, actually looks like it might have been the back of an 8 inch three jaw chuck. An 8 inch 4 jaw would be much handier, and as Aaron suggested my 4 jaw is only rated to 760 rpm.

Greg