The Rexroth R166529420 is a high-precision Ball Runner Block from the KWD series, designed for demanding linear motion applications. This component features a flanged, short, standard height (FKS) format, making it versatile for installations where space is a consideration. Constructed from carbon steel, it offers excellent rigidity and durability. The C0 preload class indicates it is supplied without preload, suitable for applications with low external loads or where minimal friction is paramount. As part of Rexroth’s world-class linear guide systems, this runner block ensures smooth, accurate, and reliable performance in automation, machine tools, and material handling systems.