High-Precision Alloy Steel Bushing for Hydraulic Rock Drills Engineered for extreme underground mining conditions, this bushing ensures reliable performance in high-vibration hydraulic rock drill systems. Constructed from 20CrMnTi alloy steel with 58-62 HRC surface hardness and 1200 MPa tensile strength, it withstands continuous dynamic loads while resisting abrasion and corrosion in harsh environments .
Technical Specifications & Design The bushing adheres to ISO 723 standards (38 mm inner diameter, 55 mm outer diameter, 80 mm length) for precision fit in hydraulic cylinder assemblies and drill rig components . Its nitrided surface treatment (0.3-0.5 mm layer depth, 1000 HV hardness) provides superior wear resistance, extending service life by 40% compared to standard electroplated coatings . The 180 N·m threaded connection torque and 350 MPa maximum working pressure make it suitable for heavy-duty hydraulic applications .
Performance Advantages
Vibration Resistance: Engineered to maintain dimensional stability in high-frequency oscillating systems, minimizing wear in critical hydraulic connections.
Corrosion Protection: Nitrided surface exceeds industry standards, providing long-term durability in wet or corrosive mining environments.
Precision Fit: ISO 723 dimensions ensure compatibility with standard hydraulic system components.
Ease of Installation: Clear torque specifications streamline maintenance processes.
Applications
Underground Mining: Critical for securing high-pressure hydraulic lines in rock drills used in tunnel boring and ore extraction.
Heavy Machinery: Used in excavators and loaders to maintain structural integrity in dynamic hydraulic systems.
Industrial Hydraulics: Supports presses and material handling equipment, ensuring consistent pressure retention in repetitive motion tasks.
