Heavy-Duty Bolt for Rock Drill Jumbos Engineered to withstand the extreme forces and harsh environments of rock drill jumbos, this high-tensile bolt delivers reliable performance in critical structural and mechanical connections. Its robust design ensures secure fastening even under high vibration and temperature fluctuations, making it essential for mining and tunneling operations .
Technical Specifications & Design
Core Performance Traits:
High-Tensile Strength: 10.9 grade rating with 1200MPa ultimate tensile strength provides exceptional load-bearing capacity, critical for heavy drill arm components .
Corrosion Resistance: Zinc-nickel plating offers 1000-hour salt spray resistance (ASTM B117), protecting against moisture and mineral oils in mining environments .
Temperature Versatility: Operates reliably from -50°C (cold underground mines) to +150°C (high-friction areas), maintaining structural integrity without embrittlement .
Performance Advantages
Secure Fastening:
Precision-rolled threads ensure uniform load distribution and resistance to loosening under vibration, reducing maintenance checks .
Optimal torque range (35-40 N·m) prevents over-tightening and thread stripping, extending component life .
Durability:
Compatible with standard hex nuts, ensuring easy replacement and integration with existing rock drill systems .
Chamfered end simplifies installation, even in tight spaces common in drill jumbo assemblies .
Applications
Rock Drill Jumbos: Used in drill arm pivot points, hydraulic cylinder mounts, and structural frame connections.
Mining Equipment: Suitable for tunneling machines, blast hole drills, and heavy-duty loaders requiring high-strength fasteners.
Industrial Machinery: Ideal for crushers, conveyors, and construction equipment operating in abrasive environments.
