High-Load Chrome Alloy Steel Needle Bearing for Hydraulic Rock Drills Engineered for extreme underground mining conditions, this needle bearing ensures reliable performance in high-vibration hydraulic rock drill applications. Constructed from 1.2067 quenched & tempered chrome alloy steel with 1080 MPa tensile strength and HRC 58-62 hardness, it withstands continuous dynamic loads while resisting abrasion and corrosion in harsh environments 2.
Technical Specifications & Design The bearing features an 85 mm inner diameter, 92 mm outer diameter, and 35 mm width, adhering to ISO 1204:2016 P6 class dimensional tolerances for precision fit in hydraulic cylinder assemblies and drill rig components. Its hot-dip galvanized coating (54 μm thickness) passes 500+ hours of salt spray testing (ISO 9227 standard), ensuring long-term performance in wet or corrosive mining environments 27. The 1200 N·m axial load capacity and 3000 RPM rotational speed make it suitable for heavy-duty hydraulic systems.
Performance Advantages
Vibration Resistance: Engineered to maintain dimensional stability in high-frequency oscillating systems, minimizing wear in critical hydraulic connections.
Corrosion Protection: Hot-dip galvanized coating exceeds industry standards, extending service life by 40% compared to standard electroplated coatings 7.
Precision Fit: Dimensions adhere to ISO 1204:2016 P6 class tolerances, ensuring compatibility with standard hydraulic system components.
Ease of Installation: Clear load capacity specifications streamline maintenance processes.
Applications
Underground Mining: Critical for supporting high-load pivots in rock drills used in tunnel boring and ore extraction.
Heavy Machinery: Used in excavators and loaders to reduce friction in high-pressure hydraulic lines.
Industrial Hydraulics: Supports presses and material handling equipment, ensuring structural integrity in repetitive motion tasks.
