The Expanding Shaft (OEM Part No. 5112008779) is an alloy steel mechanical spare part designed for expansion and mechanical transmission applications in mining and drilling equipment. It is compatible with Simba E70, Simba M4C, Simba E7C, and Simba M40S. The expanding shaft supports mechanical engagement, positioning, and transmission within the drilling assembly. Manufactured for aftermarket replacement applications, the 5112008779 Expanding Shaft is suitable for replacing worn or damaged mechanical components during equipment maintenance and repair. Its alloy steel construction provides dependable strength and reliable performance in demanding mining and drilling environments.