Some cool cnc 3 axis milling China machine images:
3-Axis CNCMilling Machine China Motor Mount 4
Image by r_william.king
Here, the "X" axis is mounted to the black pipe. Same type of mounting scheme as in the Y-stage but modified. Star lock washers are used on the screws.
3-Axis CNCMilling Machine China Motor Mount 2
Image by r_william.king
Another examination of the motor mount.
3-Axis CNCMilling Machine China Rail Guide 3
Image by r_william.king
Yet another picture of the rail guide bearings.