The Rexroth R165189420 is a high-precision Ball Runner Block designed for demanding linear motion applications. As part of the Ball Rail System, this FNS (Flanged, Normal length, Standard height) model offers exceptional rigidity and a high load-bearing capacity in all four main loading directions. Manufactured from durable carbon steel, it ensures long service life and reliable performance in industrial automation, machine tools, and robotics. Its design allows for easy mounting and integration into various systems, providing smooth, low-friction movement with high accuracy.