Case KAA1160 Bottom Track Roller Assembly

The KAA1160 bottom track roller is a critical undercarriage component designed for Case mini excavators. It functions as a lower roller, supporting the machine weight and guiding the track chain. The assembly features a single flange configuration, forged hardened steel shell, and sealed duo-cone lubricated bearings for extended service life in abrasive conditions. It arrives fully assembled for direct bolt-on installation. This roller replaces the original Case OEM part number KAA1160 and cross-references Sumitomo VKAA1160V and VPI numbers. Compatible models include Case CX75SR, CX75C SR, CX75CSR, CX80, and CX80C, as well as Link-Belt 75 LX, 75 X3, 80 LX, and 80 X3 excavators. Engineered to meet OEM specifications for dimensional accuracy, heat treatment depth, and bearing preload.