Nut 80139189 | High-Strength Alloy Steel Nut for Hydraulic Rock Drills
Nut 80139189 | High-Strength Alloy Steel Nut for Hydraulic Rock Drills - Image 2
Nut 80139189 | High-Strength Alloy Steel Nut for Hydraulic Rock Drills - Image 3
Nut 80139189 | High-Strength Alloy Steel Nut for Hydraulic Rock Drills - Image 4

Nut 80139189 | High-Strength Alloy Steel Nut for Hydraulic Rock Drills

  • Part Number: 80139189
    • Material: Quenched & tempered alloy steel (SNB24-2) with 1500 MPa tensile strength
    • Dimensions:
      • Thread Size:
      • Hex Size:
      • Height:
      • Weight:
    • Performance Ratings:
      • Temperature Range: -40°C to +120°C
      • Maximum Working Pressure: 30 MPa
    • Compliance: ISO 898-1 Grade 10.9 (bolting standard)
    • Compatibility: Direct fit for LGMRT UD391 hydraulic rock drills requiring M20 x 2.5 thread fasteners
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High-Strength Alloy Steel Nut for Hydraulic Rock Drills
Engineered for extreme underground mining conditions, this nut ensures reliable fastening in high-vibration hydraulic rock drill applications. Constructed from SNB24-2 quenched & tempered alloy steel with 1500 MPa tensile strength, it withstands continuous dynamic loads while resisting abrasion and corrosion in harsh environments .

 

Technical Specifications & Design
The nut features M20 x 2.5 metric threads (ISO 724) and a 20 mm hex size (ISO 4032 Class A tolerance), designed for secure mounting in hydraulic cylinder assemblies and drill rig components. Its zinc-nickel plating (10 μm thickness) passes 1000+ hours of salt spray testing, ensuring long-term performance in wet or corrosive mining environments . The recommended torque requirement of 280 N·m simplifies installation and reduces downtime .

 

Performance Advantages
  • Vibration Resistance: Engineered to maintain dimensional stability in high-frequency oscillating systems, minimizing loosening in critical hydraulic connections.
  • Corrosion Protection: Zinc-nickel plating exceeds industry standards, extending service life by 50% compared to standard galvanized coatings .
  • Precision Fit: Dimensions adhere to ISO 4032 Class A tolerances, ensuring compatibility with standard hydraulic system components.
  • Ease of Installation: Clear torque specification streamlines assembly and maintenance processes.

 

Applications
  • Underground Mining: Critical for fastening hydraulic connections in LGMRT UD391 rock drills used in tunnel boring and ore extraction.
  • Heavy Machinery: Used in excavators and loaders to secure high-pressure pivot points and hydraulic lines.
  • Industrial Hydraulics: Supports presses and material handling equipment, ensuring structural integrity in repetitive motion tasks.

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