This is the X axis with the second collar installed. If you want to use the roller bearings on the X also, just use the factory bearing washers with the concave sides facing each other without the bearing race as shims to take up the extra length. McMaster Carr sells thicker washers for the roller bearings also.
Interestingly enough, my kit had almost exactly the right length turned on each end of the X axis screw to mount the split collar on the back of the thrust bearings already. With the second collar on the shaft, the length sticking out of the bearing housing fits much better and the threads go right up to the lovejoy connector on the other end. Pictures on the CNC Fusion website look like they are all made that way. The only modification necessary was to cut off about 1/2" from the screw at the motor end because of the collar width. |