Heavy-Duty Pin Assembly for Rock Drill Jumbos Engineered to connect critical moving components in rock drill jumbos, this pin assembly delivers reliable performance in high-vibration mining environments. Its robust construction ensures secure pivot functionality for drill arms, boom hinges, and hydraulic cylinder mounts, even under extreme loads .
Technical Specifications & Design
Core Performance Traits:
High Tensile Strength: 900MPa ultimate tensile strength (42CrMo alloy steel, GB/T 3077 compliant) provides exceptional resistance to bending and shear forces, critical for heavy drill arm movements .
Load Handling: 200kN dynamic load capacity supports the inertia of rotating components, reducing the risk of premature failure during operation .
Corrosion Resistance: Zinc-nickel plating offers 1000-hour salt spray resistance (ASTM B117), protecting against moisture and mineral oils in underground and surface mines .
Performance Advantages
Extended Service Life:
50,000-cycle fatigue life (ISO 12107 testing) minimizes maintenance downtime, withstanding repetitive pivot motions in drilling operations .
Precision machining (±0.02mm tolerance) ensures tight fit with mating bushings, reducing wear and vibration-induced noise .
Environmental Resilience:
Operates reliably from -40°C (cold underground mines) to +120°C (high-friction pivot points), maintaining structural integrity without embrittlement .
Applications
Rock Drill Jumbos: Used in drill arm pivots, boom hinges, and hydraulic cylinder mounts to enable smooth, controlled movement.
Mining Equipment: Compatible with tunnel boring machines, hydraulic drills, and heavy-duty loaders requiring durable pivot components.
Industrial Machinery: Suitable for construction equipment and material handlers with high-stress pivot joints.
