In HC20 Hydraulic Rock Drill (or Hydraulic Drifter) systems, the Drive component 86250107 is the “power transmission bridge”—it connects the hydraulic motor to the impact mechanism, transferring rotational and impact power to the drill bit. This part endures extreme stress: every impact cycle (up to 1400 bpm for HC20) creates friction and torque on its gears and contact surfaces. Montabert’s engineering data confirms that after 800 hours of impact operation, even high-quality drive components show 0.2mm+ wear on key surfaces—enough to reduce power transmission efficiency by 18-22% and increase noise/vibration (accelerating damage to adjacent parts).

1. Wear resistance: Its gears are made of heat-treated alloy steel (HRC 50-55) with a wear-resistant coating, ensuring it meets the 800-hour service life requirement.
2. Power transmission efficiency: Precision machining (tolerance ±0.002mm) ensures seamless meshing with HC20’s motor and impact mechanism—no power loss.
3. Structural stability: The component’s integrated design reduces vibration during operation, protecting adjacent parts from premature wear.