Needle Bearing 81503519 | High-Load Chrome Alloy Steel Needle Bearing for Hydraulic Rock Drills

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.