4 Pcs Extra Long LM6UU Linear Ball Bearings LM6LUU 6mm Bore Dia 12mm OD 35mm Length with Double Side Rubber Seal Great for CNC 3D Printer

Package Content: 4pcs x  LM6LUU Linear Bearing Material: Carbon Steel, Rubber Color: Silver Tone Introduction of Linear Bearing? International standard steelmaking process,forged from high quality steel, good steel makes good bearings. Quiet operation, reduced noise and improved equipment performance. Used for linear stroke and cylindrical shaft with the use of the bearing ball and bearing coat point contact, the steel ball rolling with the minimum friction resistance.So linear bearing has little friction, and relatively stable, does not change with the bearing speed, can obtain high sensitivity and precision of smooth linear motion