RepRap for Science—How to Use, Design, and Troubleshoot the Self-Replicating 3-D Printer - Open-Source Lab: How to Build Your Own Hardware and Reduce Research Costs - page 109

FIGURE 5.12 Motors installed on the motor mounts and smooth rods installed for the z -axis.
5.2.6 The x -axis (left-right)
First, obtain all the x -axis components shown in Figure 5.13 . Then, assuming that the printed
parts you are working with are not perfect, clean up motor end of the x -axis with a knife for
needle-nose pliers as seen in the yellow parts of Figure 5.14 , which show before (right) and
after cleaning (left). You also need to use a knife to dig out a hole in the big nut trap, but us-
ing a drill bit is usually easier. Load M3 nuts into the x -axis and use a threaded rod to push
through to the botom and then thread the screw for both of the deep nut traps as shown in
Figure 5.15 .