M8 Linear bearing (LM8LUU Drylin Hybrid)

thingiverse

I spotted some LM8LUU printed bearings that borrowed features from the IGUS Drylin bearings concepts, but they lacked the circlip indents of the original and had square corners on the inner fin angles. So I designed two new LM8LUU bearings with the circlip indents and added fillets to the inner fin corners. There's a 12- and 18-tooth version; I've made a 28-tooth model, but it might not print well. If anyone prints this one, I'd love to see the results. I printed these at 100 microns with three shells, which essentially gives me 100% infill, and dropped the outline edge speed to 35% of max (50mm/s normal). As you can see, my vertical is a bit off, so I'll investigate that issue further, but otherwise the models should be dimensionally accurate to the LM8LUU. I've ordered some circlips and plan to fit them on my Wanhao Duplicator i3 once they arrive; it'll be interesting to see how they compare to each other and a standard bearing. These bearings are made from PLA, but I'd prefer to print with PET or Nylon – both would probably perform better, and Nylon could potentially work really well. **Update: I added a 10-tooth version, which closely matches the IGUS part number RJ4JP-01-08, although this one is 45mm long; the image on the website shows 12 teeth, but when I looked at the drawing, it showed 10!