Hexagon Head Bolt 80053869 | High-Strength Alloy Steel Bolt for Hydraulic Rock Drills
Hexagon Head Bolt 80053869 | High-Strength Alloy Steel Bolt for Hydraulic Rock Drills - Image 2
Hexagon Head Bolt 80053869 | High-Strength Alloy Steel Bolt for Hydraulic Rock Drills - Image 3

Hexagon Head Bolt 80053869 | High-Strength Alloy Steel Bolt for Hydraulic Rock Drills

Part Number: 80053869
  • Material: 20MnTiB alloy steel (ISO 898-1 Class 10.9)
  • Dimensions:
    • Thread Size:
    • Thread Pitch:
    • Head Size:
  • Weight:
  • Tensile Strength: 1040 MPa (ISO 898-1 Class 10.9)
  • Yield Strength: 940 MPa
  • Surface Coating: Zinc-plated with chromate conversion (salt spray resistance ≥120 hours)
  • Torque Rating: 60 N·m (recommended installation torque)
  • Compatibility: Direct fit for hydraulic rock drills requiring M12 x 50 mm fasteners
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High-Strength Alloy Steel Hexagon Head Bolt for Hydraulic Rock Drills
Engineered for extreme underground mining conditions, this bolt ensures reliable fastening in high-vibration hydraulic rock drill applications. Constructed from 20MnTiB alloy steel (ISO 898-1 Class 10.9), it withstands continuous dynamic loads while resisting fatigue and corrosion in harsh environments .

 

Technical Specifications & Design
The bolt features an M12 x 50 mm thread (ISO 4014) with a 1.75 mm pitch, designed for secure mounting in hydraulic cylinder assemblies and drill rig components. Its hexagonal head (18 mm width) provides optimal grip for torque application, while the zinc-plated coating with chromate conversion offers 120+ hours of salt spray resistance (ISO 9227) . The 20MnTiB alloy steel composition delivers a tensile strength of 1040 MPa and yield strength of 940 MPa, ensuring structural integrity under heavy impact loads .

 

Performance Advantages
  • Vibration Resistance: Engineered to maintain clamping force in high-frequency oscillating systems, reducing the risk of loosening during drilling operations.
  • Corrosion Protection: Zinc plating with chromate conversion meets ISO 9227 standards, extending service life in wet or corrosive mining environments.
  • Precision Fit: Thread dimensions adhere to ISO 4014 tolerances, ensuring compatibility with standard hydraulic system components.
  • Ease of Installation: Recommended torque rating of 60 N·m simplifies assembly and reduces the likelihood of over-tightening .

 

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 hydraulic lines and structural components.
  • Industrial Equipment: Supports presses and material handling systems requiring reliable, high-strength fasteners.

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