Thomson Industries Inc of USA who invented ball bushings offer patented super smart ball bushings which have some unique advantages. 10 recirculating ball tracks provide 6 times more load capacity and 216 times longer bearing travel life compared to conventional linear bearings. As it can take such a higher load, down sizing of slide is possible by going for smaller dia linear bearings, shaftings. Also lower capacity belts, gears and motors can be used. The travel life is high resulting in less down time and replacements. Other features include: universal self aligning capability in pitch, roll and yaw to save installation costs, pre-loaded linear bearings that increase the life of linear race, forgiving to imperfect housing bores and co-efficient of friction is as less as 0.001 to 0.004. Ile bushings come with double lip wipers to keep dirt out and lubricant in. Equivalent Japanese, European and American standards are available. Also offered are pillow blocks (linear bearings with housing) in open and close types, high quality shafts and support rails as a bottom support for shaftings, die set ball bushings, multi-track ball bushings for rigidity, 6 track ball bushings, miniature ball bushings and anti corrosion linear bearin s in stainless steel/chrome plated balls.