Bushing 86747979 | High-Precision Alloy Steel Bushing for Hydraulic Rock Drills

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 .