O-Ring 80151729 | High-Pressure Nitrile Rubber O-Ring for Hydraulic Rock Drills

Part Number: 80151729
  • Material: Nitrile rubber (NBR) with Shore A 70 hardness
  • Dimensions:
    • Inside Diameter (ID):
    • Cross-Section (CS):
    • Weight:
  • Performance Ratings:
    • Maximum Working Pressure: 20 MPa (without backup ring)
    • Temperature Range: -40°C to +125°C
    • Chemical Resistance: Hydraulic oils, fuels, and mineral-based fluids
  • Compliance: ISO 3601-3 Grade N (general-purpose quality standard)
  • Compatibility: Direct fit for hydraulic rock drills requiring AS568 ID 25.4 mm x CS 3.53 mm seals
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High-Pressure Nitrile Rubber O-Ring for Hydraulic Rock Drills
Engineered for extreme underground mining conditions, this O-ring ensures reliable sealing in high-vibration hydraulic rock drill systems. Constructed from nitrile rubber (NBR) with Shore A 70 hardness, it withstands continuous dynamic loads while resisting abrasion and chemical corrosion in harsh environments .

 

Technical Specifications & Design
The O-ring adheres to AS568 standard dimensions (ID 25.4 mm x CS 3.53 mm) and ISO 3601-1 Class A tolerances, ensuring precise fit in hydraulic cylinder assemblies and drill rig components . Its zinc-plated surface treatment (12 μm thickness) passes 240 hours of salt spray testing (ISO 9227), providing long-term durability in wet or corrosive mining environments . The 20 MPa maximum working pressure (without backup ring) and -40°C to +125°C temperature range make it suitable for heavy-duty hydraulic applications .

 

Performance Advantages
  • Vibration Resistance: Engineered to maintain dimensional stability in high-frequency oscillating systems, minimizing wear in critical hydraulic connections.
  • Corrosion Protection: Zinc plating exceeds industry standards, extending service life by 30% compared to standard electroplated coatings .
  • Precision Fit: AS568 dimensions ensure compatibility with standard hydraulic system components.
  • Ease of Installation: Clear torque specifications (15 N·m for threaded fittings) streamline maintenance processes .

 

Applications
  • Underground Mining: Critical for sealing high-pressure hydraulic lines in rock drills used in tunnel boring and ore extraction.
  • Heavy Machinery: Used in excavators and loaders to prevent fluid leakage in dynamic hydraulic systems.
  • Industrial Hydraulics: Supports presses and material handling equipment, ensuring consistent pressure retention in repetitive motion tasks.