Oil-Resistant O-ring for Hydraulic Rock Drills This O-ring is engineered to provide reliable sealing in hydraulic rock drill systems, preventing fluid leakage in mining environments where exposure to mineral oils, moderate-to-high pressures, and temperature variations is common. Constructed from nitrile (NBR) rubber, it balances excellent oil resistance with flexibility, making it ideal for critical components like valve bodies, fluid ports, and hydraulic line connections.
Key Performance Attributes
Material & Durability:
Nitrile rubber offers superior resistance to mineral oils, greases, and petroleum-based hydraulic fluids, maintaining elasticity even after prolonged exposure. Its 70 Shore A hardness ensures proper compression in grooves, creating a secure seal without excessive deformation under 25MPa pressure—critical for withstanding routine pressure fluctuations in rock drill operations .
The molded, splice-free design eliminates weak points, reducing the risk of tearing during installation or vibration-induced movement. This construction extends service life to 80,000+ cycles in standard conditions, outperforming spliced alternatives in durability tests .
Sealing & Precision:
Compliant with ISO 3601-1 size tolerances, the O-ring ensures consistent fit in standard grooves, validated through 11,000-cycle pressure testing (ISO 18797) with zero measurable leakage. This precision minimizes pressure loss in hydraulic circuits, enhancing overall system efficiency .
Operational Compatibility:
The -30°C to +120°C temperature range makes it suitable for cold underground mines and moderate-heat zones near drill components. It integrates seamlessly with existing hydraulic rock drill assemblies, supporting quick replacement during maintenance .
RoHS compliance ensures alignment with global environmental standards for mining equipment components.
Applications
Hydraulic Rock Drills: Seals valve bodies, fluid ports, and medium-pressure hydraulic line connections.
Mining Equipment: Compatible with tunneling machines, quarry drills, and exploration rigs using mineral oil-based hydraulic fluids.
