The Pinion (OEM Part No. 3128309879) is a spare part compatible with Simba M4C, M40S, Simba H1354 underground drilling rigs. Manufactured from high-strength alloy steel, it is designed as a mechanical component for the pinion assembly position in gear drive and rotation transmission systems. The pinion transfers rotational power through gear mechanisms, ensuring accurate movement and efficient operation of drilling equipment. Its durable construction provides excellent strength, wear resistance, and reliable performance under demanding mining conditions. This OEM replacement pinion supports stable rotation and long service life.