Bosch Rexroth R167121320 Runner Block Bearing

Rexroth R167121320 Runner Block CS KWD-025-BNS-C1-H-1 delivers precise, low-friction linear motion in Bosch Rexroth Ball Rail Systems, built around a recirculating-ball bearing and guideway assembly. The CS family block features a four-row O-arrangement with integrated sealing and a wide-flange design that increases mounting rigidity on the 25 mm KWD-025 rail profile. This model is the substitution for R167121310, confirming its place in Rexroth’s B.RUNNER BLOCK CS line and its suitability for standard-length blocks in this profile. The 25 mm rail width and CS/KWD designation designate it for compact, precision positioning tasks where reliable carriage movement is essential. Typical applications include CNC machines, automated assembly lines, packaging equipment, and other precision linear-motion setups where repeatable, straight-line travel is required in constrained spaces. With Rexroth’s proven engineering, the R167121320 runner block is designed to endure demanding industrial environments while delivering consistent performance in conveying, positioning, and guiding operations.