Bosch Rexroth R165321420 Runner Block Ball Rail

The Bosch Rexroth R165321420 is a size-25 B.RUNNER BLOCK CS ball rail runner block designed for use with Rexroth ball rails. This carbon steel housing (CS) unit is pre-greased and identified by the variant code KWD-025-FLS-C1-N-1, placing it in Rexroth’s 25 mm family with standard-accuracy configuration. When mounted on a compatible Rexroth ball rail, the block delivers precise, low-friction linear guidance for automated equipment and manufacturing lines, enabling repeatable positioning along a compact, modular guide system. The R165321420 designation places it within Rexroth’s CS line of runner blocks, offering standardized mounting interfaces and dependable performance in applications such as CNC slides, packaging machinery, and general automation where rigid, reliable linear motion is required. With its carbon-steel body and pre-lubricated design, this runner block supports straightforward installation and long service life in demanding industrial environments.