Re: Ballscrew Bearing/Thrust Bearing Arrangement (G0704)
AC bearings have a direction.
In the drawing I see no reason for the thrust bearings. All that is needed is two AC bearings properly loaded.
A simple way is to use two washers. One for the inside race and one for the outside. Make one washer .015" thinner than the other and that will give you ABOUT the correct amount of preload.
If you look at the bearings inside race one side is thin and one side is thick. The standard way is to have the thin side face in and for the thinner shim to be on the inside race.
If you do it this way you bolt the bearings to the screw and then the OD of the bearing is clamped to the housing.
I do it different for my 704 kits but you need to cut a double sided pocket in each bearing mount. Both ways work.
youtube videos of the G0704 under the name arizonavideo99