Item Type: Flange Linear Motion Bearing Material: Bearing steel Optional Style: LMK13UU, LMK12UU, LMK8UU, LMK6UU LMK13UU: Inner Diameter: Approx. 13mm / 0.5in Diameter: Approx. 23mm / 0.9in Thickness: Approx. 32mm / 1.3in LMK12UU: Inner Diameter: Approx. 12mm / 0.5in Diameter: Approx. 21mm / 0.8in Thickness: Approx. 30mm / 1.2in LMK8UU: Inner Diameter: Approx. 8mm / 0.3in Diameter: Approx. 15mm / 0.6in Thickness: Approx. 24mm / 0.9in LMK6UU: Inner Diameter: Approx. 6mm / 0.2in Diameter: Approx. 12mm / 0.5in Thickness: Approx. 19mm / 0.7in Introduction to Linear Bearings: It is a linear motion system produced at low cost. It is used for infinite stroke and cylindrical shaft. Because the load ball is in point contact with the shaft, the use load is small. The steel ball rotates with very little frictional resistance, so that it can obtain high-accuracy and smooth movement Linear Bearing Features: Linear bearings are used in conjunction with hardened linear drive shafts. A system for infinite linear motion. The load ball and the hardened drive shaft are in point contact and allow a small load. Application: Widely used in electronic machinery, power tools, sports equipment, packaging machinery, food machinery, printing machinery, woodworking machinery, crystal machinery, textile machinery, light industry machinery, mining machinery, engraving machines and automation equipment, numerical control equipment, etc. Uses: Linear bearings are widely used in accuracy equipment such as electronic equipment, tensile testing machines and digital three-dimensional coordinate measuring equipment, as well as industrial machinery such as the sliding parts of machine tools, punches, tool grinders, automatic gas cutting machines, printers, card sorters, and food packaging machines Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.