Bosch Rexroth R163211420 Runner Block Ball Rail

R163211420 is Bosch Rexroth’s aluminum runner block (carriage) for ball rail systems, identified by the model code KWD-015-SNS-C1-N-1 within the B.RUNNER BLOCK AL family. This aluminum runner block houses recirculating ball bearings in a precision housing and is designed to ride along a compatible Rexroth ball rail, forming a linear guidance unit. The part is intended for use in industrial robots and general machine construction where a compact, ball-bearing-mounted longitudinal guide is required. As a standard Rexroth component, it integrates with Rexroth ball rails to deliver controlled linear motion across the length of the installation, enabling accurate positioning of attached tooling or mechanisms in compact footprints.