Full Diameter Range DTH Button Bits 64mm - 445mm

The ROSCHEN Full Range DTH Button Bits cover the most comprehensive diameter spectrum in down-the-hole drilling, from compact 64mm (2-1/2") bits to large-diameter 445mm (17-1/2") bits. This complete range enables a single-supplier solution for drilling contractors working across diverse projects at every scale.

Diameter Range Coverage

Key Advantages

• Complete Range: 64mm to 445mm covers quarry, mining, water well, geothermal, construction foundation and tunneling applications with a single trusted source
• Premium Alloy Steel Body: Forged nickel-alloy steel undergoes precise heat treatment including carburizing, quenching and tempering for maximum fatigue resistance under high-frequency piston impact
• Top-Grade Carbide Inserts: YG8 and YG11 tungsten carbide buttons engineered for specific rock hardness, with spherical, ballistic and parabolic profiles available
• Multiple Face Designs: Flat face for hard rock, concave face for all-round drilling, convex face for high penetration rates, and drop center for soft to medium formations
• Universal Shank Compatibility: Precision-machined splines match DHD, COP, QL, SD, Mission, BR, CIR and NUMA hammer shanks for seamless integration

Quality Assurance

Every bit undergoes CNC machining tolerance inspection, carbide button brazing integrity testing, and dimensional verification against original equipment specifications. ISO 9001:2015 certified manufacturing ensures consistent quality across all diameter ranges.