The Shaft (OEM Part No. 3128312020) is a mechanical spare component compatible with Boltec S10M, Boltec S,Boltec 235 , Boltec-MC, Boltec-S mesh bolting rig, and Boomer-MD underground drilling rigs. Manufactured from durable alloy steel, it is designed for the feed assembly drive mechanism position. The shaft transfers mechanical force and supports stable movement within the feed system, ensuring accurate operation and reliable performance. Its strong construction provides high load resistance, precise fitting, and long service life under demanding underground mining conditions. This OEM replacement shaft helps maintain feed assembly efficiency and equipment reliability.