Linear roller bearings with spacer elements are suitable for numerous applications in general mechanical engineering, especially where high guidance and positional accuracy is required over long displacement distances. They are characterised by a very high load carrying capacity with low, uniform friction. HIR Roller Ways require only a small design envelope, have high load carrying capacity and are characterised by low, uniform friction and high accuracy throughout their operating life. In a preloaded design, the guidance systems can achieve extremely high rigidity. Since the high accuracy roller is built into the highly flat surface way finished by accurate ground, the product has a high rigidity and high accuracy. Also because the variation of operation height can be selected in the unit of 2 μm, the load can be evenly distributed even in the multiple-use environment. The structure of all models lets the roller to be guided accurately without creating skew, yielding an extremely stable and smooth linear motion.