Review on Enhance Precision and Smoothness with Uxcell LM10UU Linear Bearings Length by Allen Hart

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 condition. Next time I will order my next set from my printer manufacturer.