This Henglong 50mm × 66mm tapered ball-tooth drill bit is engineered for demanding, high-impact applications in mine tunnel construction and underground reinforcement projects. Combining exceptional durability with precision drilling performance, it delivers reliable operation in medium-hard to hard rock formations.

• Essential tool for underground mine tunnel support systems
• Ideal for anchor bolt drilling and excavation operations
• Constructed from high-quality heat-treated steel for maximum strength
• Features wear-resistant tungsten carbide ball teeth for extended service life
• Reinforced drill rod and integrated button welding withstand repeated impact loads
• Minimizes equipment downtime during high-intensity drilling operations
• 50mm drilling diameter with 66mm working length for consistent, uniform holes
• Critical for maintaining tunnel wall stability and preventing collapses
• Tapered drill rod ensures seamless compatibility with most underground rock drilling machines