Drill Rod Adapter Pin 29250006541 | High-Torque for Rock Drill Jumbos
29250006541 Drill Rod Adapter Pin for Rock Drill Jumbos – 42CrMo4 Alloy, HRC50-55 Hardness, 8000N·m Torque
42CrMo4 alloy steel | Induction-hardened (3-4mm depth) | HRC50-55 surface hardness, HRC30-35 core

Drill Rod Adapter Pin 29250006541 | High-Torque for Rock Drill Jumbos

Part Number: 29250006541
  • 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:
    • Thread Standard: API 7-1 (1.5″ nominal diameter)
    • Surface Treatment: 8μm zinc plating (ASTM B633)
    • Torque Capacity: 8000N·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 Drill Rod Adapter Pin for Rock Drill Jumbos
This drill rod adapter pin is engineered to connect drill rods in rock drill jumbo systems, transmitting high torque during drilling operations while withstanding axial loads and vibration in abrasive mining environments. Its robust design ensures reliable power transfer, minimizing downtime from rod disconnections or pin failures.

 

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 rock drilling .
    • 8μm zinc plating (ASTM B633) provides corrosion protection, validated through 72-hour salt spray testing (ASTM B117) to withstand damp underground conditions .
  • Precision & Compatibility:
    • IT7 dimensional tolerance (ISO 286-1) ensures a tight fit with API 7-1 drill rods, reducing thread wear and preventing rod slippage during high-torque drilling. The Ra 0.8μm surface finish minimizes friction, extending thread life by 30% compared to standard pins .
    • API 7-1 threaded ends allow compatibility with most rock drill jumbo models, simplifying replacement and maintenance .
  • Performance Under Load:
    • Rated for 8000N·m continuous torque, it handles the rotational forces generated during hard rock drilling. The 10⁶ cycle fatigue life (ISO 12044) ensures longevity in repetitive drilling operations .
    • Operating temperature range (-30°C to +100°C) ensures stability in both cold underground mines and high-friction drilling scenarios .

 

Applications
  • Rock Drill Jumbos: Essential for connecting drill rods in horizontal, vertical, and angled drilling operations.
  • Mining Equipment: Compatible with tunnel boring machines, quarry drills, and mineral exploration rigs.
  • Construction Machinery: Suitable for foundation drilling and rock excavation equipment.

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