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If the OD was perfectly coventry to the bore , this would work.? However that is never the case. Barrel work should be set up off the bore. Thats an interesting idea? though.-Jody

Thanks Steve, I'll hang onto this seller for future half nut swap.Jody

Look at this on eBay Atlas / Craftsman 10F-12 10" & 12" Lathe Half Nuts / Split Nut Here is the link to the brass half nuts that I installed in my lathe yesterday. Steve Haskell Troy, MI

I've got a sears version of the Atlas 618, but it doesn't have an id tag. I'd appreciate your assistance in identifying the model number. Thank you in advance. Don

Has anyone ever tried making a spider with a collet chuck to hold the outboard end of the work?? It seems like that would center up easier.

Thank you Raymond for the excellent information and explanation. Bob

OK. The best that I can say is between 1948 and 1953. The photo on page 6 shows the switch escutcheon (mounting plate) is rectangular. The rectangular escutcheon first appeared in a 1942 catalog. The

Be certain the cross dove on top of the carriage has not become worn such that it is hour-glass shaped - narrow in the middle, or wedge shaped - narrow at front or back. You can measure this with a

In gunsmithing you will run a spider on both sides of the headstock to avoid that issue, there being essentially point contact on both ends.?? You will generally center it using pin gauges.??

If the stock is larger in diameter than 25/32” it won’t go through the spindle on an Atlas 9”, 10” or 12” anyway. If the stock diameter is 25/32” or less and it is held in a 3-jaw chuck or

See attachment: Rollie's Dad's Method of Lathe Alignment, from NEMES ( http://www.neme-s.org/ ) (New England Model Engineering Society) Raymond

Robert, Attached are the photos you requested for identification. Don

OK, the next thing to check for is twist in the bed. A master precision level is the tool for this, but there are some other ways to measure it. Also, wear of the bed, especially the rear vertical

Those are nice looking Charles.? Thanks for the links.? I might pick up those cap screws. -Jody

Robert, I see where you are going.? This is actually and excellent idea for stock up to the 3/4" size.? This might be added to the growing list of projects for tolling on my lathe.? It seems my

Brass half-nuts....that's a great upgrade.? Didn't know those were out there to buy.? I wish I had known this when I rebuilt mine.? Thanks for the pics.? Very nice looking and yes, very good

I bought MT2 and MT3 versions of these a few years ago , and they have proved invaluable in setting up my , and others, lathes , resetting tailstocks etc . . . a worthwhile investment and a great time

I have not built one for my atlas, as I pretty much use it for a second operation machine. My primary lathe will take 2 inches through the spindle. I built a spider for it out of thick wall mechanical

It just occurred to me that a fairly obvious and available ready-made choice would be an adaptor from the thread on the left end of the spindle to 1-1/2”-8 would allow one to use a Jacobs 59B

Thank you everyone for the great information. Mike what a great find.that hardened shaft looks amazing. So I do have timken bearing in this lathe so when I restored this lathe a year ago I changed