
I tested all 12 bearings when they arrived. 7 of them worked well and slid easily along the pole. The remaining 5 moved roughly and firmly along the bar. I've tried oiling them and screwing them on by hand to no avail. From what I've read online this is the average for a LM8UU at this price point.

Goodyear Ultra Grip Ice SUV 235/65 R17 108T winter
35 Review

Iverntech MGN12 400Mm Linear Rail Guide Upgrade For Ender 3, Corexy, Tronxy, Delta Kossel 3D Printers And CNC Machines With Stainless Steel Carriage Block
12 Review

Iverntech MGN12 700Mm Linear Rail Guide With MGN12H Stainless Steel Carriage Block For 3D Printer And CNC Parts
11 Review

Iverntech MGN12H Linear Rail Guide With Stainless Steel Carriage Blocks - 700Mm Length For 3D Printer And CNC Machine
9 Review