High-Torque Driver for Hydraulic Rock Drills This driver is engineered to transmit rotational force in hydraulic rock drill mechanisms, ensuring efficient power transfer in heavy-duty mining operations. Constructed from 42CrMo4 alloy steel with induction hardening, it combines high surface hardness (HRC55-60) 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 800Nm continuous torque applications. The induction-hardened surface (4mm depth) resists galling and wear, extending service life by 50% compared to carbon steel drivers .
Nitrided surface treatment (0.15mm case depth) enhances corrosion resistance, validated through 200-hour salt spray testing (ASTM B117) to withstand damp underground conditions .
Precision Engineering:
18-spline design (DIN 5480, module 3.0) with IT6 tolerance ensures seamless meshing with drive shafts, minimizing backlash and vibration. The Ra 0.8μm surface finish reduces friction, maintaining torque transmission efficiency in high-speed operations .
Operational Reliability:
Rated for 1.2×10⁶ 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 drive systems .
Applications
Hydraulic Rock Drills: Critical for torque transmission in R38 drill rotary mechanisms and impact systems.
Mining Equipment: Compatible with tunneling machines, quarry drills, and mineral exploration rigs requiring high-torque drive components.
