Seal Kit 86878089 | High-Precision Nitrile Rubber Seals for Hydraulic Rock Drills
Seal Kit 86878089 | High-Precision Nitrile Rubber Seals for Hydraulic Rock Drills - Image 2
Seal Kit 86878089 | High-Precision Nitrile Rubber Seals for Hydraulic Rock Drills - Image 3
Seal Kit 86878089 | High-Precision Nitrile Rubber Seals for Hydraulic Rock Drills - Image 4

Seal Kit 86878089 | High-Precision Nitrile Rubber Seals for Hydraulic Rock Drills

Part Number: 86878089
  • Material:
    • O-Rings: Nitrile rubber (NBR) with 95 Shore A hardness, ISO 3601-1 compliant
    • Backup Rings: Polyurethane (PU) for extrusion resistance
  • Dimensions:
    • O-Ring ID: 38 mm (ISO 3601-1 standard)
    • O-Ring OD: 55 mm
    • Seal Thickness: 3.5 mm
  • Performance Ratings:
    • Maximum Working Pressure: 350 MPa
    • Temperature Range: -40°C to +120°C
  • Components:
    • 4x O-Rings (38 mm ID x 55 mm OD)
    • 2x Polyurethane backup rings
    • 1x Dust wiper seal
    • 1x Installation manual
  • Compliance: ISO 3601-1 (O-ring dimensions and tolerances)
  • Compatibility: Direct fit for hydraulic rock drills requiring 38 mm bore seals
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High-Precision Nitrile Rubber Seal Kit for Hydraulic Rock Drills
Engineered for extreme underground mining conditions, this seal kit ensures reliable performance in high-vibration hydraulic rock drill systems. Constructed with ISO 3601-1 compliant nitrile rubber (NBR) O-rings and polyurethane backup rings, it withstands continuous dynamic loads while resisting abrasion and corrosion in harsh environments .

 

Technical Specifications & Design
The seal kit includes four O-rings (38 mm inner diameter, 55 mm outer diameter) and two polyurethane backup rings, designed to maintain pressure integrity in hydraulic cylinders. The nitrile rubber components offer a temperature range of -40°C to +120°C and a maximum working pressure of 350 MPa, ensuring compatibility with high-pressure hydraulic systems . The 3.5 mm seal thickness and 95 Shore A hardness provide optimal resilience against extrusion and wear .

 

Performance Advantages
  • Vibration Resistance: Engineered to maintain dimensional stability in high-frequency oscillating systems, minimizing wear in critical hydraulic connections.
  • Corrosion Protection: Nitrile rubber exceeds industry standards for resistance to mineral oils, greases, and hydraulic fluids.
  • Precision Fit: ISO 3601-1 dimensions ensure compatibility with standard hydraulic system components.
  • Ease of Installation: Includes a dust wiper seal and step-by-step instructions for seamless assembly.

 

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

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