Top-hammer drill bits are critical tools in mining operations and tunnel excavation; their specifications directly impact drilling efficiency and service life. Key parameters include:

Diameter Range: Common specifications span φ64mm to φ127mm (referencing the industry standard for *Rock Drilling Machinery and Pneumatic Tools*). Among these, the φ89mm and φ102mm models are the mainstream choices, suitable for medium-hard rock formations.

Material Classification:

Carbide Inserts: Primarily composed of tungsten-cobalt alloys (e.g., YG8), featuring a hardness of ≥89 HRA and strong impact resistance.

Steel Body: Constructed from 42CrMo alloy steel; following quenching and tempering treatment, the material achieves a hardness of HRC 28–32, ensuring excellent toughness.

Thread Types: Available in two main types-R32 (light-duty) and T38 (heavy-duty)-with the latter predominantly utilized in large-scale hydraulic rock drills.