High-Strength Screw for Hydraulic Rock Drills This screw is engineered to secure critical components in hydraulic rock drills, providing reliable fastening under high vibration and extreme environmental conditions. Constructed from 10.9 grade high-tensile steel, it offers exceptional tensile strength (1040 MPa minimum) and fatigue resistance, ensuring long-term stability in mining and construction applications.
Key Performance Attributes
Material & Durability:
10.9 grade high-tensile steel exceeds standard fastener strength, withstanding repeated stress from drill vibrations without deformation. The zinc-nickel plating provides superior corrosion resistance, validated through 500+ hours of salt spray testing (ASTM B117)—outperforming standard zinc plating by 300% in harsh, damp environments .
The self-locking thread design prevents loosening under cyclic loads, a critical feature in rock drills where vibration can compromise component security.
Precision & Compatibility:
Manufactured to DIN 933 standards, the screw features precise metric coarse threads (M10×1.5) and a hexagonal head (17mm across flats) for consistent fit with standard tools. This precision ensures compatibility with hydraulic rock drill housings, valve covers, and structural components .
Operational Reliability:
Rated for a maximum torque of 50 Nm, it balances secure fastening with ease of installation/removal during maintenance. The -40°C to +120°C operating range ensures performance stability in extreme cold (arctic mining) and high-heat zones near drill motors .
Applications
Hydraulic Rock Drills: Secures housing panels, valve covers, and structural brackets.
Mining Equipment: Suitable for tunneling machines, quarry drills, and exploration rigs requiring high-strength, vibration-resistant fasteners.
