Shank Thrust 86747672 | High-Load Resistance for Hydraulic Rock Drills
Montabert 86747672 Shank Thrust for Hydraulic Rock Drills – 42CrMo4 Alloy, 180kN Load, HRC50-55
42CrMo4 alloy steel | Induction-hardened (3.5mm depth) | HRC50-55 surface, HRC30-35 core

Shank Thrust 86747672 | High-Load Resistance for Hydraulic Rock Drills

Part Number: 86747672
  • Technical Specifications:
    • Material: 42CrMo4 alloy steel (EN 10083-3) with induction hardening
    • Hardness: HRC50-55 (surface); HRC30-35 (core)
    • Tensile Strength: 1100MPa
    • Precision: IT7 dimensional tolerance (ISO 286-1)
  • Design Features:
    • Compatibility: R38 drill shanks (ISO 10424-1)
    • Surface Treatment: 10μm zinc-nickel plating (ASTM B841)
    • Load Capacity: 180kN axial thrust
  • Performance Metrics:
    • Fatigue Life: 1.2×10⁶ cycles under rated load (ISO 12044)
    • Operating Temperature: -30°C to +100°C
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Heavy-Duty Shank Thrust for Hydraulic Rock Drills
This shank thrust component is engineered to absorb axial loads in hydraulic rock drills, ensuring stable force transmission during high-intensity mining operations. Constructed from 42CrMo4 alloy steel with induction hardening, it combines high surface hardness (HRC50-55) for wear resistance with a tough core (HRC30-35) to withstand impact loads, critical for reliability in abrasive drilling environments.

 

Key Performance Attributes
  • Material & Durability:
    • 42CrMo4 alloy steel achieves 1100MPa tensile strength, making it suitable for 180kN axial thrust applications—30% higher load capacity than standard carbon steel components. The induction-hardened surface (3.5mm depth) resists galling and wear, extending service life by 50% in field tests .
    • 10μm zinc-nickel plating (ASTM B841) provides 500-hour salt spray resistance (ASTM B117), outperforming conventional zinc plating in damp underground mines .
  • Precision & Compatibility:
    • IT7 dimensional tolerance (ISO 286-1) ensures a tight fit with R38 drill shanks (ISO 10424-1), minimizing vibration-induced wear. The Ra 0.8μm surface finish reduces friction between mating components, preventing premature failure in high-speed operations .
  • Operational Reliability:
    • Rated for 1.2×10⁶ fatigue cycles under rated load (ISO 12044), it handles repetitive thrust forces from rock drill impact mechanisms. The -30°C to +100°C operating range ensures performance stability in cold mines and high-friction drilling zones .

 

Applications
  • Hydraulic Rock Drills: Critical for absorbing axial loads in R38 drill shank systems during rotary and impact drilling.
  • Mining Equipment: Compatible with tunnel boring machines, quarry drills, and mineral exploration rigs requiring high-load thrust components.

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