Black Menba 6Pcs LM8LUU 8mm Longer Linear Motion Ball Bearings For Linear Motion on 3D Printer, CNC, and Other Applications

These bearings are loud and clearly of low quality. They do work but they are not nice and make my printer very loud. Having done more research, I wish I had bought Igus composite bearings(bushings) instead.

Working well so far, noisier than I would have hoped but definitely quieter than the stock bearings on my Maker Select v2 printer.We'll see how they hold up.

The original LM8UU bearings didn't last long in my 3D printer. These have been very consistent and are still holding strong after 4 months of almost constant use. I'm glad I upgraded.

Some are a better fit than others. They all work but some are a perfect fit and some seem to be a bit grindy. Overall a good value.

Balls don't circulate (may not even be rotating) on any of the precision (US) shafts I've tried. Left scratches on hardened rod with lots of lube and light load.

They are good bearings. Greatly improved my print quality. No more wobbles or vibrations.

I used these to replace my Wanhao Duplicator i3's Y axis bearings. If you are using the stock plastic bearing holders, you do NOT need C clips- otherwise you would need 15mm circlips. A plus is that I now have two spare bearings just in case.These bearings are much better than the stock bearings and instantly made my machine MUCH quieter. There is a slight increase in print quality too but it is not dramatic. I recommend these over the IGUS plastic bearings because they need to be clamped correctly to release the lubricant inside and I do not think the stock plastic ones do that.

Just your average quality Chinese bearings. Nothing special, but get the job done.