C1900007491 Bushing for Rock Drill Jumbos – SAE 660 Bronze, 20MPa Load Capacity, Oil-Lubricated Design
SAE 660 bronze (C93200) construction | 20MPa static load capacity | High impact resistance (20J at -20°C)
Radial oil grooves for uniform lubrication | Heat dissipation channels | Compatible with mineral-based oils

Bushing C1900007491 High-Load Capacity for Rock Drill Jumbos

Part Number: C1900007491
  • Technical Specifications:
    • Material: SAE 660 bronze (C93200) with phosphate coating
    • Lubrication: Oil-lubricated with radial cooling grooves
    • Load capacity:
    • Operating temperature range: -30°C to +150°C
  • Design Features:
    • Multi-step bore design for precise alignment
    • High impact resistance (20J at -20°C)
    • 0.05mm radial clearance for smooth rotation
  • Durability:
    • 72-hour salt spray resistance (ASTM B117)
    • Wear-resistant surface finish (Ra 0.8μm)
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Heavy-Duty Bushing for Rock Drill Jumbos
This SAE 660 bronze bushing is engineered to withstand extreme loads and harsh environments in rock drill jumbo applications. Its robust design ensures reliable performance in high-vibration, high-impact scenarios, reducing downtime and maintenance costs .

 

Technical Specifications & Design

 

  • Material & Construction:
    • Constructed from SAE 660 bronze (C93200), a high-lead tin bronze renowned for its combination of hardness (70 HB) and impact resistance (20J at -20°C) .
    • Phosphate coating provides 72-hour salt spray resistance (ASTM B117), protecting against corrosion from moisture and mineral oils .
  • Lubrication System:
    • Radial oil grooves and cooling channels ensure uniform lubrication distribution, maintaining optimal performance even at high speeds. The design is compatible with mineral-based oils and grease, reducing friction and wear .
  • Load Handling:
    • Capable of supporting 20MPa static loads and 15MPa dynamic loads, making it suitable for heavy-duty applications such as drill arm pivot points and gearbox shafts .
    • Multi-step bore design (0.05mm radial clearance) ensures precise alignment with mating components, minimizing vibration and noise .

 

Performance Advantages
  • Extended Service Life:
    • Reduces wear by 30% compared to standard steel bushings, thanks to the self-lubricating properties of SAE 660 bronze and the protective phosphate coating .
    • Low friction coefficient (0.08–0.12) reduces energy consumption and heat generation during operation.
  • Environmental Adaptability:
    • Operates reliably across a wide temperature range (-30°C to +150°C), making it suitable for both cold underground mines and high-temperature hydraulic systems .
    • Resistant to common mining fluids, including coolants and road salts, ensuring longevity in corrosive environments .

 

Applications
  • Rock Drill Jumbos: Ideal for drill arm pivot points, gearbox shafts, and hydraulic cylinder guides.
  • Mining Equipment: Compatible with loaders, excavators, and tunneling machines requiring high-load bushings.
  • Industrial Machinery: Suitable for crushers, conveyors, and material handling systems in abrasive environments.

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