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 106

You will need two sets of the following parts needed for each side:
Ten M8 washers
Two 608 bearings
Eight M8 nuts
M8 threaded rod of 294 mm
Two rod clamps
Starting from the left order of assembly (assembly is symmetric about the 608 bearings):
washer, nut, nut, washer, rod clamp, washer, nut, nut, washer, washer, 608 bearing, 608 bear-
ing, washer, washer, nut, nut, washer, rod clamp, washer, nut, nut, and washer. The proper
order is shown in Figure 5.7 .
FIGURE 5.7 The proper order of assembly for y -axis upper rods.
Build two identical copies of Figure 5.7 . Mount them through the upper holes of the botom,
footed vertices. Add a washer and nut to each end, but continue to leave the assembly loose to
accommodate placement of parts during later steps.
5.2.4.2 Building the bottom rods
The parts you need for motor end are the following:
Two 294 mm M8 threaded rod.
Six M8 washers.
Six M8 nuts.
Parts needed for idler end are the following:
Two 294 mm M8 threaded rod.
Four M8 washers.
Four M8 nuts.
To assemble on the motor end, botom rod (motor side) follows Figure 5.8 : washer, nut, nut,
washer, washer, nut, nut, and washer.
FIGURE 5.8 Assembly of the motor end, bottom rod (motor side) for the y -axis.