Material and design ERO longitudinal guides type R are manufactured in standard option of tool steel, material Nr. 1.2842. The material hardness lies between 60 and 62 HRC. The surfaces Iare extrafine polished. Roller cages Type H : rollers are fixed, sizes 3-12 for horizontal fitting, material burnished sheet. Type V : rollers are loose, sizes 3-12 for for horizontal and vertical fitting and for tables with strong acceleration. Material brass. Type HV : rollers are fixed, only sizes 3,6 and 9 for horizontal and vertical fitting. Material Alu anodized. Type HVK rollers fixed, only sizes 3-12 for horizontal and vertical fitting. Material synthetic