Bosch Rexroth R165351210 45629 Roller Rail Runner Block

Bosch Rexroth R165351210, marketed as the KWC-055-FLS-C1-P-2 ball runner block in the FLS flange-long-standard-height format for size 55, is a high‑load, precision roller rail block designed for SNS ball guide rails to deliver maximum rigidity in all directions. The block measures 199.0 mm in length, 140 mm in width, and 57 mm in height (70 mm with the guide rail) and weighs about 6.87 kg, built from carbon steel (CS) with a low preload (C1) and precision accuracy class (P). It ships with lubrication preserved but no initial lubrication, and includes 45° angular lube nipples that are loosely attached; there is no ball chain by default. Key mounting features include end-face fastening threads for attachments and two center mounting holes to increase rigidity under lift‑off and side loading, plus complete interchangeability with all SNS ball guide rails. This runner block is intended for heavy machine construction and demanding automated systems requiring reliable, high‑load, smooth linear motion, with a dynamic load capacity rated up to 139,000 N.