Roller (pin) bearing 5x16x5mm

thingiverse

I'm looking for details on the most affordable 3D printer available on Ebay. Since small balls are virtually unprintable, I've resorted to creating roller bearings instead. The planned dimensions for these bearings are LR605 (625ZZ). To scale down to 623ZZ, one can simply reduce X and Y by 62.5% while decreasing Z by 80%, all done simultaneously. This is demonstrated in the final image. For printing pins, it's more practical to print long bars measuring between 20-30mm in length before cutting them into smaller pieces using a carpet knife. These can then be fitted snugly into holder ring holes. Before assembling the parts, apply a bit of grease to the holder and place the pins inside. Next, insert the holder into the outer ring and position it within the mid-ring.