LMK8UU 8mmSquare Flange Linear Bearing is a linear motion system used with the cylindrical shaft for unlimited travel. LMK8UU has inner diameter of 8mm. It is used to replace the damaged Ball Bearings in your devices to improve their efficiency and save energy.The Linear Bearing LMK8UU 8mm Square Flange Bushing is a low-cost linear motion system used with the cylindrical shaft for unlimited travel. The working load of such bearings is small due to the point contact of the ball and the shaft. The balls can rotate with minimal frictional resistance, thus obtaining high-precision smooth movement. The universal Ball Bearings are great for you to replace the damaged Ball Bearings in your devices to improve efficiency and save energy. Widely used in home appliances, industrial, low-noise, and high-speed electric motors, construction machinery, automotive components, pumps, and machinery. Smooth moving, low friction, high rigidity, and long life. Economical, easy to maintain and replace.