uxcell LMK12UU Linear Ball Bearings 12mm Bore 21mm OD 30mm Length Square Flange for CNC Machine 3D Printer
The universal ball bearings is great for you to replace the damaged ball bearings in your devices to improve them 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 replace.