High-Precision Drill Bushing for Hydraulic Rock Drills This drill bushing is engineered to guide drill shanks in hydraulic rock drills, ensuring stable alignment and reducing wear during high-speed drilling operations. Constructed from phosphor bronze (ASTM B148 C51000), it combines low friction with high compressive strength, making it ideal for abrasive mining environments.
Key Performance Attributes
Material & Durability:
Phosphor bronze (94% copper, 6% tin) provides excellent wear resistance and thermal conductivity, minimizing heat buildup in continuous use. Its HB170-190 hardness balances ductility and strength, preventing deformation under lateral loads from drill bit vibration .
The material’s natural corrosion resistance ensures performance stability in damp underground mines, while the polished surface (Ra 0.8μm) reduces friction-induced wear on mating shanks.
Precision Engineering:
IT5 dimensional tolerance (ISO 286-1) and 0.02mm maximum radial runout ensure consistent alignment with R38 drill shanks (ISO 10424-1). This precision reduces uneven wear on both the bushing and shank, extending service intervals by 35% compared to standard bushings .
Integral spiral lubrication grooves distribute grease evenly, maintaining a protective film even under heavy loads and temperature fluctuations (-25°C to +120°C).
Operational Reliability:
Rated for 400,000 cycles under standard drilling conditions, it withstands the repetitive forces of rock drill impact mechanisms. The bushing’s press-fit design ensures secure installation in drill housings, simplifying replacement and maintenance .
Applications
Hydraulic Rock Drills: Essential for guiding R38 drill shanks in rotary and impact drilling mechanisms.
Mining Equipment: Compatible with tunneling machines, quarry drills, and mineral exploration rigs requiring precision shank alignment.
