Warco Super Major Mill 3 month old

[grimreaper]

Robin
Thank you for your reply. I have attached three photos. One picture is of the mill that I have. Note there is no round column. One picture is of the current nut which is bolted to a raised base on the cross slide casting and the last picture is of your cross slide casting which looks the same as mine. It is that raised base that I thought of machining to give more clearance for the X nut housing. The top of the current X nut does collide with the last 100 mm at each end of the channel under the table but has 45 mm approx clearance for the rest of the travel. The FSU nuts for 20 mm are close to colliding so this is why I thought of machining the base down by 5 mm. This would give me about 1/2 to 3/4 mm deep pocket to locate the X ball screw housing.
Thank you for the heads up on the Y axis, did not think about that.
Marchant Dice Ltd can do some ball nut / screw assemblies with 0.00 to 0.15 mm back lash. That would do me fine. Based on irving2008 comments and yours I will go for 20 mm screws, 25 mm will be pushing my luck.

Ted