Acme support

[lgalla]

How are acme screws supported at each end?
Larry

[ViperTX]

You machine the ends.....a bearing journal(s) and use something like a Misumi bearing block....single bearing on the undriven end and a double bearing on the driven end.

[monte55]

My table uses 3/4 x 6tpi acme screws. I used 3/4 id bearings in retainer blocks
I made. I used acme nuts for adjustment to pre load the bearings. I used spacers made out of alum tubing to jam up against the inner race of the bearing. The only machining to the screw was to reduce one end down to 1/2 inch for the Love joy connectors. I saw no reason to lathe the screw down
for the bearing. I liked using the larger bearings. My acme nuts are side drilled & tapped for set screws. This is easier should one want to replace the screws later. Undo the nuts and slide them through the bearings. Nick