12 Pieces 3D Printer Solid Polymer LM8UU Bearing 8mm shaft - Igus Drylin RJ4JP-01-08

Inconsistent size. I tested several bearings on the same rod. Some were loose, and some were very loose. 3D printers need to print layers that are fractions of a millimeter thick. If the drivetrain is loose and can wiggle or vibrate, the print quality suffers drastically.The stock 'cheap' bearings that came with my budget basement printer are much better than these 'fancy upgrade bearings'.There is NO reason to spend money on these. period. dot.

Great purchase, best price on Amazon! These do have a tad more play than the roller bearings they are replacing, but I think they will work great! Replacing the standard roller bearing on a 3D printer.

Perfect fit...great upgrade. After a few days of use the bearings settled in and the machine was a great deal quieter.

Nice and smooth operation, very quiet compared to original ball bearings. Will highly recommend and purchase again.

worked great with my Anet A6 printer.

Thanks.....

These worked really good for my Anet A8. I will say they do add a little bit of a tension verses the ball bearing ones but they do not make any noise and slide more smoothly.