FKM (Viton) rubber seal 86752276 – dual-lip design, 6mm cross-section (ISO 3601-1)
Seal 86752276 | High-Pressure Resistance for Hydraulic Rock Drills
Montabert 86752276 Seal for Hydraulic Rock Drills – FKM Material, 25MPa Pressure, -20°C to +200°C
Seal 86752276 – IT7 tolerance (ISO 286-1), Ra 0.4μm surface, ±0.05mm dimensional accuracy

Seal 86752276 | High-Pressure Resistance for Hydraulic Rock Drills

Part Number: 86752276
  • Technical Specifications:
    • Material: FKM (fluorocarbon rubber) compound (ASTM D1418)
    • Temperature Range: -20°C to +200°C (-4°F to +392°F)
    • Pressure Rating: 25MPa (3626 psi) maximum working pressure
    • Compliance: ISO 3601-1 (size & tolerance standards)
  • Design Features:
    • Cross-Section: 6mm (±0.05mm tolerance per ISO 3601-1)
    • Hardness: 70 Shore A (±5 Shore A)
    • Seal Type: Dual-lip for enhanced leak prevention
  • Performance Metrics:
    • Compression Set: ≤20% (after 70h at 200°C, ASTM D395)
    • Service Life: 5000 hours under rated conditions
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Heavy-Duty Seal for Hydraulic Rock Drills
This seal is engineered to prevent fluid leakage in high-pressure hydraulic systems of rock drills, withstanding extreme pressure surges, temperature fluctuations, and exposure to abrasive mining contaminants. Its robust FKM construction ensures reliable sealing performance in harsh drilling environments, reducing maintenance downtime and protecting critical components such as hydraulic cylinders and valves.

 

Key Technical Attributes
  • Material & Chemical Resistance:
    • FKM (fluorocarbon rubber) compound (ASTM D1418) offers exceptional resistance to mineral oils, hydraulic fluids (ISO 6743-4), diesel, and greases. Unlike standard NBR seals, it retains 95% of its elasticity after 1000 hours of immersion in aggressive mining fluids, making it suitable for long-term use in demanding conditions .
  • Pressure & Temperature Performance:
    • Rated for 25MPa maximum working pressure, it effectively seals hydraulic circuits during peak drilling loads. The -20°C to +200°C operating range ensures stability in both cold underground mines and high-friction hydraulic systems, where conventional rubber seals would degrade .
  • Precision & Durability:
    • 6mm cross-section with ±0.05mm tolerance (ISO 3601-1) ensures a tight fit in ISO 3601-3 seal grooves, minimizing wear and extending service life to 5000 hours under rated conditions. The dual-lip design enhances leak prevention, while 70 Shore A hardness balances flexibility and resistance to extrusion under high pressure .

 

Applications
  • Primary use in hydraulic rock drills for tunneling, quarrying, and mineral exploration.
  • Compatible with hydraulic systems in mining equipment, including tunnel boring machines and surface drill rigs.

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