Heavy-Duty O-Ring for Rock Drill Jumbos This O-ring is engineered to provide reliable sealing in hydraulic systems of rock drill jumbos, withstanding extreme temperatures, high pressures, and exposure to mining fluids. Its robust FKM construction ensures long-term performance in harsh environments, reducing leakage-related downtime and protecting critical hydraulic components.
Technical Specifications & Design
Material & Chemical Resistance:
FKM (fluorocarbon rubber) compound (ASTM D1418) offers exceptional resistance to mineral oils, hydraulic fluids (ISO 6743-4), diesel, and greases. Unlike standard NBR seals, it retains 95% elasticity after 1000 hours of immersion in aggressive mining fluids .
The material’s high-temperature stability (-20°C to +200°C) makes it suitable for high-friction hydraulic circuits in rock drill jumbos, where conventional rubber seals would degrade .
Sealing Performance:
6mm cross-section with ±0.1mm tolerance (ISO 3601-1) ensures a tight fit in standard seal grooves, providing effective static and dynamic sealing at pressures up to 20MPa. The 70 Shore A hardness balances flexibility and durability, preventing extrusion under high pressure .
Low compression set (≤20% per ASTM D395) maintains sealing force over 5000 hours of operation, reducing the need for frequent replacements .
Environmental Adaptability:
Resistant to ozone, weathering, and humid conditions, ensuring longevity in underground mines and outdoor construction sites. Its compatibility with ISO 3601-3 grooves simplifies installation and replacement in standard rock drill jumbo assemblies .
Applications
Rock Drill Jumbos: Seals hydraulic cylinders, valve bodies, and pipe connections in drill arm and propulsion systems.
Mining Equipment: Compatible with loaders, excavators, and tunneling machines requiring high-temperature seals.
Industrial Hydraulics: Suitable for heavy-duty systems in steel mills, foundries, and construction machinery.
