NSK BA180-4BWSA Angular Contact Ball Bearing

The BA180-4BWSA is a double-row angular contact ball bearing designed for final drive travel motor applications in Komatsu hydraulic excavators. It features a 40-degree contact angle optimized for heavy combined axial and radial loads encountered in track drive systems. The bearing supports planetary gear assemblies within the travel motor reduction unit. Manufactured to ABEC P0-P2 precision tolerances with bearing steel construction. Open configuration for oil lubrication within the final drive housing. Direct replacement for Komatsu OEM part numbers TZ200A1021-00 and TZ200A1021-01. Compatible with PC100-3, PC120-3, and PC150-3 series excavators.