The Hydraulic Cylinder (OEM Part No. 3128008216) is a replacement hydraulic actuating component used on Epiroc / Atlas Copco Simba M6C, Simba E7C and Simba H1354 drilling rigs. It is associated with the drill steel support mechanism and converts hydraulic pressure into controlled linear movement for positioning and operating the supporting components during drilling. The cylinder helps maintain stable movement and reliable support of the drill steel handling system under demanding underground mining conditions. The 3128008216 Hydraulic Cylinder is suitable for routine maintenance and replacement when the original cylinder develops leakage, seal wear, rod damage or reduced hydraulic performance. Public spare-parts documentation identifies this part as an Epiroc BSH Cylinder / Oil Cylinder and confirms its application on Simba drilling equipment.