The Shaft (OEM Part No. 3128309152) is a spare part compatible with S7D, Boltec 235, Boltec-MC, Boomer-MD, and S7D-1 underground drilling rigs. Manufactured from high-strength alloy steel, it is designed as a mechanical component for the shaft assembly position in mechanical drive and pivot support systems. The shaft provides reliable alignment, support, and power transmission between mechanical assemblies, ensuring smooth movement and stable equipment operation. Its durable construction offers excellent strength, wear resistance, and long service life under demanding underground mining conditions. This OEM replacement shaft supports dependable drilling and bolting performance.