Now let's get started on the actual meat of the build. You will start with the z-axis. The z-axis is the axis that will move the router (or ...
Step 1: Linear Slide Bearings Video
The CNC router would be useless without a way to move the router on the axis without play. Linear slide bearings are the answer. They enable a very stable and smooth sliding motion without binding. this method of bearings has been used many times, so you can be sure they will work.
The slide bearings are one of the most important component to the CNC router, and it's good to get the concept down in the beginning. You will need about 6 of these in the CNC build at varying sizes (the gantry slide bearings will need to be much longer than the y and z axes.
You will need regular skate bearing (609zz), 5/16" nuts, 5/16" x 3/4" bolts, various drill bits and a 5/16" tap/drill bit set.