SC8UU Linear Bearing With Flex Element For M4

thingiverse

I've reduced the mounting hole diameter to 3.2mm, making it a snug fit for threading with stock M4 screws. One of these bearings serves as a lower bearing on my Anet A8 B X-axis and performs flawlessly! The story behind this: The Y-axis of the Anet A8 only has three bearings in place, which works but I firmly believe four bearings would be significantly better. Since ball bearings work more effectively on the Y-axis due to their greater tolerance, I decided to repurpose one from the X-axis. Initially, I tested a printable SC8 bearing without flex elements, but it failed miserably because it was not tolerant enough and what worked in the middle got stuck in the "Home" position. Perhaps these one-piece bearings would work on an extremely high-end machine with perfect straightness, parallelism, and rigidity, but our budget-friendly printers aren't quite that precise. I then began searching for another solution and discovered http://www.thingiverse.com/thing:1055756 featuring flex elements, which I believed could potentially work, so I decided to give it a try – and I was right! It works like a charm! Print Settings: Printer: Anet A8 B with E3D v6 bowden Rafts: No Supports: No Resolution: 0.1 Infill: 25 Notes: I printed one in ABS using a 0.4mm nozzle and two perimeters. Before lubricating the linear rod, slide it a few times in and out until the bearing glides smoothly – a cheap Chinese linear rod with a sharp edge like on Anet A8 works exceptionally well. The infill percentage is the crucial number where "Repetier-Host" with "CuraEngine" starts producing enough lines to hold the inner cylinder, so this is what you should look for!