Yes, there was a copy of the Atlas half nut installation instructions included with the new nuts. No adjustment needed other than moving the tailstock to the far RH end of the bed, lock down the taikstock, then move the saddle down to the far RH end of the bed as far as the tailstock will allow. Then use a 7/16” wrench to loosen the hex head screw on the underside of the leadscrew bearing bracket. Then engage the half nut lever to clamp the half nuts onto the leadscrew. This sets the leadscrew bearing bracket front/rear position. Finally tighten the hex head screw on the bottom of the leadscrew bearing bracket.
This was an install on a Model 3996 12” Atlas (aka “Craftsman Commercial”). The “Adjusting Lead Screw Alignment” instructions are shown in the Model 3996 Operating Instructions and Parts List in the Group files section.
On an Atlas 10F lathe, the 10F-16 leadscrew bearing bracket is solid with no forward/rear adjustment. I guess if any adjustment was necessary one could shim behind the bracket or remove a slight amount of material from the mounting face of the bracket.
Steve Haskell
Troy, MI
Steven H