Enhance Precision and Smoothness with Uxcell LM10UU Linear Bearings Length Review

I built the Hypercube Evolution using 2 lm10uu for each side of the XY link. When printing the bank, the Y-axis suddenly started shifting, forcing me to stop printing. I removed the rattling bearing and opened it up only to find that one of the ball bearings was broken into pieces (see picture). Upon closer inspection, I found that the other 3 are also rattling. Maybe just this batch because I bought lm8uu from the same seller and they work smoothly on the X axis. Maybe avoid lm10uu

Quality material. I like the color and compactness. If I need to buy more for a future update I will buy more of these. I gave 4 out of 5 stars because one of the four bearings on the stem is a bit tight. I'm assuming it's still within tolerance. The other three bearings slide very smoothly over my cranks and I'm very happy with them. I only needed two so the third will serve as a backup if needed and the fourth as a last resort while a new order is on the way.

They arrived dry as expected but the bearings have already lost the quality they used to be. I lubricated them well, the excess grease that came out of the bearing when I mounted them on the cranks was dirty and black. The tolerances were poor compared to what my printer came with. A camp has lost two balls. I'll only keep them if I absolutely need a new bearing, but I won't be using them. They had to be coated with something to protect the bearings from corrosion and keep the seals in good…