The Shaft (OEM Part No. 3128309115) is a spare part compatible with Boltec 235, Boltec-MC, and Boomer-MD 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 support systems. The shaft provides reliable support, alignment, and power transmission between connected components, ensuring smooth 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 is suitable for drilling and bolting applications requiring dependable mechanical performance.