Bosch Rexroth R162321420 Ball Runner

R162321420 is a Bosch Rexroth ball runner block, coded KWD-025-SLS-C1-N-1, designed for Rexroth SLS slimline rails. Cast in carbon steel (CS), this long slimline runner block is size 25 and features four rows in an O-arrangement with integrated sealing for reliable operation in dusty or oily environments. Built for high-load linear motion where transverse space is limited, it provides recirculating ball bearing guidance with low-friction travel and precise guidance. The block ships without a ball chain and is part of Rexroth’s B.RUNNER BLOCK family, offering standard accuracy (N) on a compact form factor optimized for tight machine layouts. Typical applications include compact axes in CNC machines, automation equipment, and precision positioning systems where a robust, durable carriage is required on Rexroth rails; the combination of CS material, sealed design, and four-row guidance supports long service life and repeatable positioning in demanding industrial environments.