Type RN and RNG linear guideways with rollers, Type R linear guideways with balls or rollers, Type RD linear guideways with balls or rollers, Type NO linear guideways with rollers or needles The types RN, RNG, R, RD, NO, and MV provide linear motion technology with a cross-roller guideway, ball guideway, needle bearings, or needle cages Frictionless roller guideways, such as in Types RN, RNG, R, RD, NO, and MV move machinery or assemblies in linear directions