Pulley Shaft C190000805035 | High-Strength for Rock Drill Jumbos
C190000805035 Pulley Shaft for Rock Drill Jumbos – 42CrMo4 Alloy, HRC50-55 Hardness, 6500N·m Torque Capacity

Pulley Shaft C190000805035 | High-Strength for Rock Drill Jumbos

Part Number: C190000805035
  • Technical Specifications:
    • Material: 42CrMo4 alloy steel (EN 10083-3) with induction hardening
    • Hardness: HRC50-55 (surface); HRC30-35 (core)
    • Precision: IT7 dimensional tolerance (ISO 286-1)
    • Tensile Strength: 1200MPa
  • Design Features:
    • Bearing Interface: Compatible with ISO 15745-1 deep groove ball bearings
    • Surface Treatment: 8μm zinc plating (ASTM B633)
    • Torque Capacity: 6500N·m (continuous operation)
  • Performance Metrics:
    • Fatigue Life: 10⁶ cycles under rated load (ISO 12044)
    • Operating Temperature: -30°C to +100°C
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Heavy-Duty Pulley Shaft for Rock Drill Jumbos
This pulley shaft is engineered to support torque transmission in rock drill jumbo pulley systems, withstanding radial loads, vibration, and abrasive contaminants in mining environments. Its robust design ensures reliable operation in critical lifting and positioning mechanisms, reducing downtime from shaft failure or bearing misalignment.

 

Technical Specifications & Design
  • Material & Durability:
    • Constructed from 42CrMo4 alloy steel, featuring induction-hardened surfaces (3-4mm depth) for HRC50-55 wear resistance and a tough core (HRC30-35) to absorb impact loads. This material achieves 1200MPa tensile strength, suitable for heavy-duty pulley applications .
    • 8μm zinc plating provides 72-hour salt spray resistance (ASTM B117), protecting against corrosion in damp underground mines and extending service life by 35% compared to uncoated shafts .
  • Precision Engineering:
    • IT7 dimensional tolerance (ISO 286-1) ensures proper alignment with ISO 15745-1 bearings, minimizing friction and premature wear. The Ra 0.8μm surface finish reduces bearing noise and extends lubricant life in high-vibration environments .
    • Precision-machined bearing seats (±0.02mm concentricity) maintain pulley balance, preventing uneven wear during rotation .
  • Performance Under Load:
    • Rated for 6500N·m continuous torque, it handles rotational forces from cable tension in drill arm positioning. The 10⁶ cycle fatigue life (ISO 12044) ensures durability in repetitive lifting operations .
    • Operating temperature range (-30°C to +100°C) maintains stability in cold mines and high-friction systems .

 

Applications
  • Rock Drill Jumbos: Supports pulley systems in drill arm lifting, cable winches, and boom positioning.
  • Mining Equipment: Compatible with loaders, crushers, and tunneling machines requiring heavy-duty pulley shafts.
  • Industrial Machinery: Suitable for material handling conveyors and crane systems.

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