The Shaft compl. (OEM Part No. 3128315451) is a spare part compatible withBoltec S10M, Boltec S, Boomer 291, Boomer 281, Simba S7D, , Boomer S2, boomer-282, Boomer S1D underground drilling rigs. Manufactured from durable alloy steel, it is categorized as a wear part for the rotary power transmission assembly at the main rotating shaft position. This complete transmission shaft bears continuous rotary friction and heavy torque loads during drilling operations, transferring power to rock drill components. Its wear-resistant alloy steel surface reduces abrasion, ensures smooth power output and extends maintenance intervals of mining rig rotary systems.