High-Strength Shaft for Hydraulic Rock Drills This shaft is engineered to transmit torque and axial loads in hydraulic rock drill gearboxes, ensuring reliable power transfer in heavy-duty 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 absorb impact loads, critical for durability in abrasive environments.
Key Performance Attributes
Material & Durability:
42CrMo4 alloy steel achieves 1100MPa tensile strength, making it suitable for 500Nm continuous torque applications. The induction-hardened surface (5mm depth) resists galling and wear, extending service life by 60% compared to carbon steel shafts .
Nitrided surface treatment (0.1mm case depth) enhances corrosion resistance, validated through 200-hour salt spray testing (ASTM B117) to withstand damp underground conditions .
Precision & Compatibility:
IT6 dimensional tolerance (ISO 286-1) and 0.01mm roundness ensure smooth operation in gearbox assemblies. The 24-tooth spline (DIN 5480, module 2.5) provides secure torque transmission with minimal backlash, reducing vibration-induced wear .
Operational Reliability:
Rated for 10⁶ fatigue cycles under rated load (ISO 12044), it handles repetitive torque fluctuations from rock drill impact mechanisms. The -30°C to +120°C operating range maintains performance stability in cold mines and high-friction gear systems .
Applications
Hydraulic Rock Drills: Critical for torque transmission in gearboxes and drive mechanisms.
Mining Equipment: Compatible with tunneling machines, quarry drills, and mineral exploration rigs requiring high-strength rotating components.
