The Expanding Shaft (OEM Part No. 3155177280) is a spare part compatible with Boomer M2D, Boltec 235 , Boltec MC, Boomer L2D, Boomer M2C, Boomer MD, underground drilling rigs. Manufactured from high-strength alloy steel, it serves as a mechanical component for the expansion positioning locking assembly at the expanding shaft mount position. It provides secure locking, accurate positioning, and stable connection between mechanical parts during operation. Designed for underground mining applications, this expanding shaft offers excellent strength and durability. Precise OEM dimensions ensure reliable installation and consistent equipment performance.