O-Ring 42870210 AF25010499 High-Temperature Resistant EPDM Rubber O-Ring for Hydraulic Rock Drills
O-Ring 42870210 AF25010499 High-Temperature Resistant EPDM Rubber O-Ring for Hydraulic Rock Drills - Image 2
O-Ring 42870210 AF25010499 High-Temperature Resistant EPDM Rubber O-Ring for Hydraulic Rock Drills - Image 3

O-Ring 42870210 AF25010499 High-Temperature Resistant EPDM Rubber O-Ring for Hydraulic Rock Drills

Part Number: 42870210\AF25010499
  • Material: Nitrile Butadiene Rubber (NBR) with zinc-plated steel reinforcement ring 1718
  • Dimensions:
    • Inner Diameter:
    • Outer Diameter:
    • Thickness:
  • Weight: 0.03 kg (calculated based on EPDM density of 1.22 g/cm³ and dimensions) 511
  • Hardness: Shore A 70 (ISO 868 compliant) 56
  • Temperature Range: -40°C to +150°C 517
  • Pressure Rating: 30 bar (dynamic) / 40 bar (static) 910
  • Surface Finish: Textured surface for enhanced grip and anti-slip performance
  • Compatibility: Direct fit for hydraulic rock drills requiring 25 mm bore diameter mounting
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High-Temperature Resistant EPDM 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 applications. Constructed from Ethylene Propylene Diene Monomer (EPDM) rubber with a zinc-plated steel reinforcement ring, it withstands continuous dynamic loads up to 30 bar while resisting oil and abrasion in harsh environments .

 

Technical Specifications & Design
The O-ring features a 25 mm inner diameter (ISO 3601 tolerance) and 32 mm outer diameter, designed for secure mounting in hydraulic cylinder assemblies and drill rig components. Its Shore A 70 hardness provides optimal balance between flexibility and structural integrity, reducing the risk of extrusion under high pressure 519. The zinc-plated steel ring enhances dimensional stability, ensuring consistent performance even in repetitive impact scenarios.

 

Performance Advantages
  • Vibration Resistance: Textured surface design minimizes slippage during high-frequency oscillations, maintaining seal integrity in dynamic systems.
  • Temperature Stability: Operates reliably from -40°C to +150°C, suitable for both cold climates and high-heat drilling environments 517.
  • Longevity: EPDM rubber compound and steel reinforcement extend service life by 20% compared to standard non-reinforced O-rings, reducing downtime in critical mining operations.
  • Chemical Resistance: Resistant to mineral oils, alkalis, and mild acids, making it suitable for hydraulic systems using biodegradable or synthetic fluids 1718.

 

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

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