The Shaft (OEM Part No. 3128323906) is a spare part compatible with Boomer M2D, Boomer M2C, Boomer S1D underground drilling rigs. Manufactured from high-strength alloy steel, it serves as a mechanical component for the rotation and linkage transmission system at the pivot shaft position. It provides reliable torque transfer, accurate movement control, and stable connection between rotating and linked assemblies during drilling operations. Designed for heavy-duty mining environments, this alloy steel shaft withstands continuous mechanical loads, vibration, and wear. Precise OEM dimensions ensure smooth installation, consistent performance, and extended service life of drilling rig pivot and linkage systems.