The Hub (OEM Part No. 3128314289) is a spare part compatible with Simba S7D underground drilling rigs. Manufactured from durable alloy steel, it is designed as a structural component for the rotary connection assembly at the wheel & shaft hub mount position. It acts as a rigid mounting base to connect rotating shafts and wheel components, transmitting stable torque while bearing radial and axial dynamic loads during drilling operations. Its thick alloy steel body delivers high structural rigidity, precise OEM dimensional matching and long service life to guarantee smooth rotary movement of S7D mining equipment.