High-Strength 10.9 Grade Alloy Steel Hex Head Bolt for Hydraulic Rock Drills Engineered for extreme underground mining conditions, this bolt ensures reliable load-bearing in high-vibration hydraulic rock drill applications. Constructed from 10.9 grade alloy steel (quenched & tempered), it withstands continuous dynamic loads up to 1040 MPa while resisting abrasion and corrosion in harsh environments .
Technical Specifications & Design The bolt features an M10x1.5 mm coarse thread (ISO 4014 Class B tolerance) and 30 mm overall length, designed for secure mounting in hydraulic cylinder assemblies and drill rig components. Its 24 mm hex head width provides optimal grip for high-torque applications, while the zinc-plated coating (8 μm thickness) passes 96+ hours of salt spray testing (ISO 9227), ensuring long-term performance in wet or corrosive mining environments .
Performance Advantages
Vibration Resistance: Engineered to maintain dimensional stability in high-frequency oscillating systems, minimizing loosening in critical hydraulic connections.
Corrosion Protection: Zinc plating meets ISO 9227 standards, extending service life by 30% compared to uncoated steel bolts .
Precision Fit: Thread dimensions adhere to ISO 4014 Class B tolerances, ensuring compatibility with standard hydraulic system components.
Ease of Installation: Recommended torque of 60 N·m simplifies assembly and reduces downtime .
Applications
Underground Mining: Critical for securing hydraulic connections in rock drills used in tunnel boring and ore extraction.
Heavy Machinery: Used in excavators and loaders to fasten high-pressure pivot points.
Industrial Hydraulics: Supports presses and material handling equipment, ensuring structural integrity in repetitive motion tasks.
