[SteinHDan]

The two side rails (is that the right name?) are made of a aluminum + ABS sandwich construction. The outer sides are 3mm 6082 aluminum, which is easy to machine. The ABS in the middle is 3D printed black ABS (Verbatim), printed at 50% infill (very strong).





The motor mount for the drive motor is milled from 6mm 6082 aluminum.







The bottom rollers are industrial ball bearings with a U-groove:
- SG20 U Groove 6x24x11mm Sealed Ball Track Guide Bearing

The bolts are standard hex socket cap M6 bolts 40mm long. I'm going to use black bolts when the undercarriage has been painted.

The washers are 1mm thick. I use two in the middle to get the right width.