High-Pressure Nitrile Rubber O-Ring for Hydraulic Rock Drills Engineered for extreme underground mining conditions, this O-ring ensures reliable sealing in high-vibration hydraulic rock drill systems. Constructed from nitrile rubber (NBR) with Shore A 70 hardness, it withstands continuous dynamic loads while resisting abrasion and chemical corrosion in harsh environments .
Technical Specifications & Design The O-ring adheres to AS568 standard dimensions (ID 25.4 mm x CS 3.53 mm) and ISO 3601-1 Class A tolerances, ensuring precise fit in hydraulic cylinder assemblies and drill rig components . Its zinc-plated surface treatment (12 μm thickness) passes 240 hours of salt spray testing (ISO 9227), providing long-term durability in wet or corrosive mining environments . The 20 MPa maximum working pressure (without backup ring) and -40°C to +125°C temperature range make it suitable for heavy-duty hydraulic applications .
Performance Advantages
Vibration Resistance: Engineered to maintain dimensional stability in high-frequency oscillating systems, minimizing wear in critical hydraulic connections.
Corrosion Protection: Zinc plating exceeds industry standards, extending service life by 30% compared to standard electroplated coatings .
Precision Fit: AS568 dimensions ensure compatibility with standard hydraulic system components.
Ease of Installation: Clear torque specifications (15 N·m for threaded fittings) streamline maintenance processes .
Applications
Underground Mining: Critical for sealing high-pressure hydraulic lines in rock drills used in tunnel boring and ore extraction.
Heavy Machinery: Used in excavators and loaders to prevent fluid leakage in dynamic hydraulic systems.
Industrial Hydraulics: Supports presses and material handling equipment, ensuring consistent pressure retention in repetitive motion tasks.
