# Replacing polymer bearings on the X axis on the Mini **URL:** \ **Category:** LulzBot Mini\ **Created:** [July 1, 2016, 2:45pm UTC](https://forum.lulzbot.com/t/replacing-polymer-bearings-on-the-x-axis-on-the-mini/3670 "2016-07-01T14:45:43Z")\ **Posts on this page:** 1\ **Showing post:** 1
**Author:** ![shawnbot](https://avatars.discourse-cdn.com/v4/letter/s/ad7895/32.png) [@shawnbot](https://forum.lulzbot.com/u/shawnbot)\ **Post date:** [July 1, 2016, 2:45pm UTC](https://forum.lulzbot.com/t/replacing-polymer-bearings-on-the-x-axis-on-the-mini/3670/1 "2016-07-01T14:45:43Z")
Hello this is my second day as a 3D printer owner and need some basic help. Bought a used Mini that was listed as having possible issues but was not testing. Figured I would roll the dice and fix it myself. Well I ran into a couple that I could see very quickly after messing with it a little. The big one is the X axis the extruder runs on move jerky as I found when I tried to run my first print and it had issues making it over to the cleaning pad to clean and run calibrations, then it would try to touch the end of the bed to calibrate and miss and just dig into the bed. I checked the belt and gears and they looked fine with no slipping. I thought maybe the motor but when I turned off the system and moved the extruder by hand I noticed it didn’t glide on the rails all that well and felt a little sticky especially compared to the Y axis when pushing the bed. So I figure now it is the polymer bearings and thought either I need to adjust them or replace them. Lulzbot does not specifically list replacement bearings for the Mini in the parts list so not sure if they sell them in a size for the Mini or not and need some guidance on where to find them. Also if at all possible some instructions on replacing them or if possible just readjusting them. Not brave enough yet to rip it apart just yet without first seeing if someone with more experienced has some advice as this does not look to be a simple part replacement. Thanks in advance for help. --- _[View the full topic](https://forum.lulzbot.com/t/replacing-polymer-bearings-on-the-x-axis-on-the-mini/3670)._