Introducing the 3115027400 Gear, a precision-engineered aftermarket spare part designed for Epiroc COP1238, COP1440, COP1638 and COP1838 hydraulic rock drills. This critical component transmits rotational torque inside the rock drill’s rotation unit, ensuring smooth power delivery, accurate rotation and reliable drilling performance. Key Features Direct replacement for OEM part number 3115027400 Compatible with Epiroc COP1238, COP1440, COP1638 and COP1838 rock drills