High-Strength Disc-Lock Washer for Hydraulic Rock Drills Engineered for extreme underground mining environments, this disc-lock washer ensures reliable fastening in high-pressure hydraulic systems. Constructed from 1045 alloy steel with a zinc-plated surface (48-hour salt spray test compliance), it withstands continuous dynamic loads while resisting corrosion in harsh conditions.
Technical Specifications & Design The washer adheres to ISO 7090 standards for heavy series washers, with a disc-spring geometry that provides 3 mm thickness for optimal load distribution. Its M20 nominal size (20.83 mm ID × 36 mm OD) ensures compatibility with standard hydraulic cylinder bolts. The concave-convex design creates a mechanical wedge effect, preventing loosening under vibration without requiring additional torque tools.
Performance Advantages
Vibration Resistance: Disc-spring design outperforms conventional washers in high-vibration applications, tested to remain secure under extreme conditions.
Corrosion Protection: Zinc plating exceeds industry standards, providing long-term durability in wet or corrosive mining environments.
Easy Installation: No specialized tools required; install with concave side facing the nut to achieve recommended torque ranges (240–676 N·m).
High Strength: 900 MPa tensile strength ensures structural integrity in heavy-duty hydraulic systems.
Applications
Underground Mining: Critical for securing hydraulic cylinders in rock drills used in tunnel boring and ore extraction.
Construction Equipment: Supports excavators and loaders to maintain pressure retention in dynamic hydraulic systems.
Industrial Machinery: Used in presses and material handling equipment to prevent bolt loosening in repetitive motion tasks.
