Ever tried hammering a nail through concrete? That's roughly what top-hammer drilling feels like – inefficient and exhausting. How can we rock drill efficiently? Put the hammer right where the work happens: down the hole. That’s the heart of our Down-the-Hole (DTH) drilling rigs. We slam the bit directly into the rock, no energy wasted travelling down long rods.

How does DTH drilling work?
 

Compressed air drives a piston inside the hammer body, smashing the drill bit into the rock face – 800 to 2,200 times a minute. Picture a relentless jackhammer, but sealed tight and working underground. Every blow packs a punch because it travels mere inches. That’s why we chew through granite like others drill through clay.

Keeping Things Moving & Clean
 

While the hammer pounds, the drill string steadily rotates – 15 to 60 turns per minute. This isn’t just spinning for fun. It ensures each fresh blow hits a new spot on the rock, preventing the bit from getting stuck and carving a clean, straight hole. Simultaneously, that same compressed air blasts down the drill rods. It exits through ports in the bit, violently flushing the shattered rock chips (cuttings) back up the hole and out. No debris means smooth drilling.

Why This Beats the Old Way (Top Hammer)
 

Top-hammer rigs waste energy sending shockwaves down flimsy rods – energy fades before it hits bottom. How about our DTH hammer? It’s right there with the bit, hammering away efficiently as the hole gets deeper. No rod extensions stealing power. You get straighter holes, deeper penetration, and way less fuss in hard rock.

Built for Real Work
 

My DTH rigs aren't lab experiments. They're workhorses. Need to anchor a skyscraper into bedrock? Drill precise blast holes in a granite quarry? Secure a tunnel roof with rock bolts? Lay utilities under a crowded city street? That's our daily grind. The design – hammer at the bottom, rotation, and forced air cleaning – handles tough geology where others stall. It’s reliable power where you need it most.

DTH drilling works because it’s brutally direct. Place the hammer on the rock. Hit it hard. Turn it slightly. Blast the mess away. It cuts out the inefficiency of force traveling down rods. That’s engineering simplicity solving a tough problem: conquering deep, hard rock efficiently and cleanly.

If you encounter problems such as drilling efficiency and equipment adaptability in mining, tunnel engineering or geological exploration, please contact us. As a manufacturer with 15 years of experience in the field of down-the-hole drilling rigs, we can customize down-the-hole drilling rig solutions for you based on rock hardness, operating environment, hole diameter, depth and other requirements.