The Shaft (OEM Part No. 3128310275) is a mechanical spare component compatible with Simba M4C, Simba H1354, SIMBA H1254 underground drilling rigs. Manufactured from high-strength alloy steel, it is designed for the rotation assembly drive shaft component position. The shaft transmits mechanical force and supports stable rotation performance within the drilling system. Its durable construction provides excellent strength, accurate fitting, and long service life under heavy-duty underground mining conditions. This OEM replacement shaft helps maintain reliable rotation operation and overall drilling equipment performance.