BALL RUNNER BLOCK ALUMINUM KWD-020-FNS-C0-N-1

***Disclaimer: The following summary contains information gathered from various sources such as product descriptions, technical specifications and catalogs. While efforts have been made to provide accurate details, inaccuracies may occur. It is advised to verify all information by contacting Bosch Rexroth directly.***
The Bosch Rexroth B.RUNNER BLOCK AL (R163189420) is a high-precision aluminum ball runner block designed for linear motion applications requiring reduced weight without compromising accuracy. This runner block is part of the FNS series, indicating a flanged width, normal length, and standard height. It is manufactured with an overall length of . mm and features a body made entirely of aluminum, which offers an extracompact lightweight design compared to steel versions. The B.RUNNER BLOCK AL boasts several key specifications, including a preload class C indicating that it is preload-free and an accuracy class N for normal precision levels. The product does not include a ball chain but comes with initial lubrication and preservation for immediate use. The roller bearing grease used is Dynalub , ensuring smooth operation. Designed with optimized entry zone geometry and a high number of balls, the runner block minimizes variation in elastic deflection, enhancing its performance. The patented entry zone increases travel accuracy significantly—up to six times—while the lube connection with metal thread allows for easy maintenance from all sides. This model also features improved rigidity under liftoff and side loading conditions due to additional mounting screw holes at the center. Attachments can be mounted from both above and below the runner block, providing flexibility in design integration. Its interchangeability feature enables this runner block to be combined with all SNS ball guide rails within each accuracy class. The Bosch Rexroth B.RUNNER BLOCK AL is designed for lightweight constructions that need to compensate for low tolerances in connected structures. It supports long-term lubrication over several years and allows for greater parallelism and height offsets of mounting bases due to predrilled holes on the runner block for pinned fitting. With smooth, quiet running capabilities and compatibility with various profiled rail systems (Size E, H, K, N), this product ensures maximum precision in a wide range of applications.