Igus RJ4JP 01 08 Printer Bearing Replacement Review

Do not use for Prusa heatbed. After installing them I thought they were perfect because the bed rocked back and forth easily and quietly. Surprisingly, it only worked well for 4 hours, then one or more of those plastic bearings started to stick, resulting in a printer error with "error detection", which happens in Prusa when stepper motors offer too much resistance to the movement. I loosened each u-bolt holding each bearing with literally a slight twist of the ubolt nut on each, but then…

Bought to replace the linear bearings on my Anet A6. Once everything is set up, it works great. The only problem is that it's awfully hard to get it working. It's almost unacceptable. Even slight misalignment will cause things to get stuck and difficult to move. I tried really a lot for a couple of days but in the end I couldn't even tighten the slides to the bed frame because no matter how tight I tightened them there was a little misalignment and the bed wouldn't move (even then tried turning

UPDATE (removed and updated original review) I installed them first to replace all 10 bearings in the original Prusa I3-MK2.5. Everything worked fine and was much quieter BUT I had an issue with my Y axis. After numerous attempts to get the Y axis to pass the self test I finally decided to take everything apart and go back to my linear bearings for the Y axis. Then everything was calibrated and worked for about a week. Finally, there was a creaking sound from the Y-shaped movement. After many…