The Shaft (OEM Part No. 3128323908) is a spare part compatible with Simba E70, Boomer M2D, and M2C underground drilling rigs. Manufactured from high-strength alloy steel, it serves as a mechanical component for the boom rotation and mechanical drive system at the shaft support and rotation position. It provides reliable rotational support, accurate alignment, and efficient power transmission between connected mechanical assemblies during drilling operations. Designed for demanding underground mining conditions, this alloy steel shaft withstands heavy loads, vibration, and continuous operational stress. Precise OEM dimensions ensure easy installation, smooth rotation performance, and extended service life of boom rotation systems.