I am still using these on my main 3D printer, and they have almost 5 years!
Updated the LM8UU V3 (last file in the list) to simpler version.
These Linear bearings are good replacement parts for those who get bored with "NOISY" LMxUU ... I Know somehow some "Cheap Bearings" can do this ...
But !!! Instead of changing all the carriage ... switching to PLA "old style bearings", I designed "ready to print" Bearings, There is Three equivalents, LM6UU, LM8UU & LM10UU !.
They are all the same size as original bearings :)
Tooth thickness is made to print well on 0.5mm nozzle, altought a LM10UU 0.35mm will print really nice :)
More tooth is better :)
Hum :) well
First thing ... simple insert the printed bearings in your rods, and "play with them" rolling/sliding, to ensure they slide well, you can also lubricant them !! the lubricant will stay between tooths !!!
Simply print slow with 0 infill and 3 perimeters at least.
Hum and ... that's all I think :)
Tested them on my X & Y at 120mm/s infill and 200mm/s travel they do not fail :)
Added: LM12UU Version