Ql60 203mm Hard Rock Drilling DTH Bit Down The Hole Drilling Tools

Ql60 203mm Hard Rock Drilling DTH Bit Down The Hole Drilling Tools. Advanced DTH Design: No foot valve design eliminates fracture risks and improves reliability. Higher Drilling Speed: Drilling speed is 15%-30% higher than traditional foot valve hammers. Energy Efficiency: Lower air and oil consumption, with oil usage reduced by about 10%. Durable Material: Made from carefully selected high-quality alloy steels with HRC58-HRC63 hardness. Long Service Life: Multiple heat treatments ensure longest life under rough working conditions. Easy Maintenance: Simple structure allows easy assembly, disassembly, and cheap maintenance. Customizable Color: Available in Gold or customized colors to meet specific requirements. High Precision: Precisely machined to tight tolerance by CNC machines for optimal performance.