Recently bought a pair of 12mm rods from itworks3d and 12mm igus bearings from lulzbot and the bearings were almost impossible to get on the rail, and once on the rail were not sliding like the similar 10mm ones i have. This is not an alignment issue with the x carriage its just the single bearing and rail.
Is there a way to file down the bearing or some other method to give the bearing some ease of motion? I have an x axis that basically wont be able to move due to the friction/press fit of the bearing.
Thanks for the help!