Seal 86726668 | High-Pressure Resistance for Hydraulic Rock Drills
Montabert 86726668 Seal for Hydraulic Rock Drills – FKM Material, 30MPa Pressure, -20°C to +200°C
FKM (Viton) rubber compound | Dual-lip design | 7mm cross-section (ISO 3601-1)

Seal 86726668 | High-Pressure Resistance for Hydraulic Rock Drills

Part Number: 86726668
  • Technical Specifications:
    • Material: FKM (fluorocarbon rubber) compound (ASTM D1418)
    • Pressure Rating: 30MPa (4351 psi) maximum working pressure
    • Temperature Range: -20°C to +200°C (-4°F to +392°F)
    • Compliance: ISO 3601-1 (size & tolerance standards)
  • Design Features:
    • Cross-Section: 7mm (±0.05mm tolerance per ISO 3601-1)
    • Hardness: 75 Shore A (±5 Shore A)
    • Seal Type: Dual-lip for enhanced leak prevention
  • Performance Metrics:
    • Compression Set: ≤15% (after 70h at 200°C, ASTM D395)
    • Service Life: 8000 hours under rated conditions
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Heavy-Duty Seal for Hydraulic Rock Drills
This seal is engineered to provide reliable leak prevention in high-pressure hydraulic systems of rock drills, withstanding extreme pressure surges, temperature fluctuations, and exposure to mining fluids. Its robust design ensures long-term performance in harsh drilling environments, reducing downtime from fluid leaks and protecting critical components like cylinders and valves.

 

Technical Specifications & Design
  • Material & Chemical Resistance:
    • Constructed from FKM (fluorocarbon rubber) compound, offering exceptional resistance to mineral oils, hydraulic fluids (ISO 6743-4), and diesel. This material retains 95% of its elasticity after 1000 hours of immersion in aggressive fluids, outperforming standard NBR seals .
    • The -20°C to +200°C operating range ensures stability in both cold underground mines and high-friction hydraulic circuits, maintaining seal integrity across temperature extremes .
  • Pressure & Durability:
    • Rated for 30MPa maximum working pressure, it handles peak hydraulic loads generated during rock drilling operations. The dual-lip design enhances sealing efficiency, while the 75 Shore A hardness balances flexibility and resistance to extrusion under high pressure .
    • Precision manufacturing (±0.05mm tolerance) ensures a tight fit with ISO 3601-1 seal grooves, minimizing wear and extending service life to 8000 hours under rated conditions .
  • Performance Under Stress:
    • Low compression set (≤15% per ASTM D395) maintains sealing force over repeated cycles, critical for preventing fluid loss in dynamic hydraulic systems. The Ra 0.4μm surface finish reduces friction, further enhancing durability in high-vibration environments .

 

Applications
  • Hydraulic Rock Drills: Seals hydraulic cylinders, valve bodies, and pump connections in drilling mechanisms.
  • Mining Equipment: Compatible with tunnel boring machines, quarry drills, and mineral exploration rigs.
  • Industrial Hydraulics: Suitable for heavy-duty presses, injection molding machines, and steel mill hydraulic systems.

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