I make my own using Igus filament. No play, no backlash, various style even autoalign ....and no lubrication of course. There is close to no load on a 3D printer. Even fixed a small milling machine; 6mm left handed and no tap, just used the lead screw and heat.
Edited 1 time(s). Last edit at 09/08/2017 08:51AM by MKSA. "You failed to maintain your weapon, son" (Harry Brown )
I use I180, in fact the only choice when I bought it. I replaced every chinese bearings on my Geetech Prusa even the small ball bearings in the idler pulleys. So far so good.
Only for my extruder did I keep two quality ball bearings that I took from old hard drive.
Edited 1 time(s). Last edit at 09/08/2017 11:11PM by MKSA. "You failed to maintain your weapon, son" (Harry Brown )
For TR8 I print a bit undersized and finish with the leadscrew, heat gun while turning it with a drill. For a 6mm 1mm left pitch, too small to print and had no tap. I used the leadscrew as a tap (I filed the first cm accordingly) then same as for TR.
Gives the right size and proper surface finish. Can't be achieved by just printing. Same for bushing, I used hand reamers too. Got to be careful with the heat, you don't want the plastic to melt and stick to the screw !
Edited 1 time(s). Last edit at 09/10/2017 05:27AM by MKSA. "You failed to maintain your weapon, son" (Harry Brown )