The Bushing Half (OEM Part No. 3128310422) is a bearing spare part compatible with Simba M4C, Simba E70, Simba E7C, Simba M40S, Simba H1354, and SIMBA H1254 underground drilling rigs. Manufactured from bronze material, it is designed for the rock drill assembly bushing position. The bushing half supports smooth mechanical movement, reduces friction, and improves alignment between moving components. Its wear-resistant bronze construction provides reliable performance under continuous drilling loads and harsh underground conditions. This OEM replacement bearing component ensures accurate fitting, durability, and extended service life.