The Expanding Shaft (OEM Part No. 3222341873) is a mechanical spare part compatible with Epiroc PowerRoc-D55 and ROC PRT50 drilling equipment. Manufactured from high-strength alloy steel, it functions as an expansion and locking component within the drilling mechanism. The expanding shaft is designed to provide secure mechanical engagement and stable positioning of connected components during drilling operations. Its robust alloy steel construction supports reliable performance under demanding mining conditions and repeated mechanical loads. This aftermarket replacement component provides a practical solution for equipment maintenance and repair, helping maintain proper component positioning, secure mechanical locking, and reliable operation of the drilling mechanism on compatible Epiroc PowerRoc-D55 and ROC PRT50 equipment.