High-Tensile Stud for Hydraulic Rock Drills This stud is engineered to secure critical components in hydraulic rock drills, withstanding extreme vibration, axial loads, and abrasive mining debris. Constructed from 10.9 grade high-tensile steel (ISO 898-1), it delivers reliable clamping force in high-stress applications such as fastening drill housings, valve bodies, and hydraulic manifolds.
Key Performance Attributes
Material & Durability:
10.9 grade steel provides 1200MPa tensile strength, enabling a 30kN clamping load—50% higher than standard 8.8 grade studs. This ensures secure component retention even under repetitive impact forces from drilling operations .
8μm zinc plating (ASTM B633) offers 72-hour salt spray resistance (ASTM B117), protecting against corrosion in damp underground mines and reducing maintenance needs .
Precision & Compatibility:
M12x50mm threads (ISO 4014) with 6g thread fit ensure seamless mating with standard nuts and tapped holes. IT7 tolerance (ISO 4759-1) guarantees consistent alignment with drill components, minimizing vibration-induced loosening .
The hexagonal head (19mm wrench size) facilitates easy torque application, while pre-applied thread locker maintains clamping force in high-vibration environments—eliminating the need for secondary locking devices.
Operational Reliability:
Rated for 10⁶ fatigue cycles under full load (per ISO 12044), it handles the repetitive stress of hydraulic rock drill operation. The -40°C to +120°C operating range ensures performance stability in both cold underground tunnels and high-friction mechanical systems .
Applications
Hydraulic Rock Drills: Secures housings, cylinder mounts, and flange connections in standard drill models.
Mining Equipment: Compatible with tunneling machines, quarry drills, and mineral exploration rigs requiring high-strength fasteners.
