Corrosion-Resistant Washer for Hydraulic Rock Drills This washer is engineered to distribute load evenly across fasteners in hydraulic rock drill systems, preventing bolt loosening and component damage in high-vibration mining environments. Constructed from 304 stainless steel—known for its excellent corrosion resistance and mechanical strength—it is specifically designed for use with M10 bolts in critical components like flange connections, housing panels, and gearbox assemblies, where exposure to moisture and mineral dust is common.
Key Performance Attributes
Material & Durability:
304 stainless steel meets ASTM A480 standards, offering a minimum tensile strength of 515 MPa and resistance to rust in damp underground conditions. The passivated surface (ASTM A967) enhances corrosion resistance, withstanding 500+ hours of salt spray testing (ASTM B117)—3x better than standard carbon steel washers. This durability reduces replacement frequency by 60% in mining applications.
The flat, burr-free design ensures full contact with fastener heads and component surfaces, eliminating stress concentration points that can lead to premature wear. The uniform 2mm thickness maintains consistent load distribution, even under 12 kN static axial load (ISO 898-2).
Precision & Compatibility:
Manufactured to ISO 7089 flat washer standards with IT14 dimensional tolerance, the washer ensures seamless compatibility with M10 bolts (ISO 898-1) commonly used in hydraulic rock drills. The 18mm outer diameter and 10mm inner diameter match industry-standard fastener sizes, avoiding fitment issues during installation.
Operational Reliability:
The -40°C to +120°C operating range ensures performance stability in extreme conditions, from cold arctic quarries to hot surface mining sites. Unlike carbon steel alternatives, it requires no additional coating maintenance, reducing total ownership costs. Its lightweight design (6.8g per unit) also minimizes unnecessary load on drill components.
Applications
Primary use: Distributing load for M10 bolts in hydraulic rock drill flange connections, housing panels, and gearbox assemblies.
Compatible equipment: Tunneling machines, quarry drills, and mineral exploration rigs requiring corrosion-resistant fastener washers.
