DTH Drill Bit

At Enttu Mining Euipment. we offer a complete range of high-performance DTH (Down-the-Hole) drill bits (also known as hammer bits) to meet diverse drilling needs across mining, quarrying, water well drilling, and geothermal projects. Our product lineup covers all mainstream industry series, engineered for durability, efficiency, and compatibility with global drill rig/hammer systems.

Our Full DTH Drill Bit Series

We supply drill bits across all core industry series, each optimized for specific pressure, diameter, and rock formation requirements:

CIR Series (Low Air Pressure)
Ideal for small-scale mining, shallow drilling, and loose formations. Available in sizes 65mm–130mm, featuring a flat face design for stable penetration in soft-to-medium rock.
DHD Series (Medium/High Air Pressure)
A versatile series (90mm–305mm) with concave/flat/convex head shapes, suitable for large-scale mining, water well drilling, and abrasive rock conditions. Compatible with most standard DTH hammers.
QL/SD/SP/WK Series (High Air Pressure)
Engineered for hard rock and deep drilling (108mm–305mm). These high-pressure bits feature convex-concave/ballistic button types for extended service life in demanding quarrying and mining operations.

Key Features of Our DTH Drill Bits

Durable Button Types: Spherical/ballistic buttons made from premium tungsten carbide for maximum wear resistance.
Precision Engineering: Optimized head shapes (flat/convex/concave) and clearance designs to reduce friction and improve drilling speed.
Universal Compatibility: Matches global DTH hammer systems (e.g., Ingersoll Rand, Atlas Copco) for seamless integration.
Customizable Options: Tailored diameters, button configurations, and shank lengths to fit your specific rig/hammer model.

Specifications

Head Shape	Diameter (mm)	Shank Length (mm)	Spline	Port Holes	Button Type	Gauge Buttons
Flat Face	65 / 68	105	4	2	Spherical	4 x Ø12
Flat/Convex	76 / 85	111	4	2	Spherical	6 x Ø12 / Ø13
Convex/Concave	90/110	130	6	2	Spherical / Ballistic	6 x Ø14
Concave/Flat Face	110 / 140	140	6	2	Ballistic	6 x Ø14 / 8 x Ø14
Convex	155 / 178	170	6	3	Ballistic	9 x Ø16
Convex	195 / 203	170	6	3	Ballistic	9 x Ø16

Full Series Specification Table

Series	Air Pressure Rating	Sub-models	Diameter Range (mm)	Head Design Types	Core Application Scenarios
CIR	Low Air Pressure (LAP)	CIR110/CIR90/CIR70/CIR65	65, 76/85, 90, 110/130	Flat Face	Small-scale mining, quarrying, shallow drilling
DHD	Medium/High Air Pressure	DHD380A/360A/350A/340A/35A	90~305	Concave Face, Flat Face, Convex Face	Mining, water/geothermal well drilling, large-scale quarrying
QL	High Air Pressure (HAP)	QL80A/60A/50/40	108~305	Concave Face, Flat Face, Convex-Concave Face	Hard rock drilling, deep mining operations
SD	High Air Pressure (HAP)	No sub-models marked	108~305	Concave Face, Flat Face, Convex-Concave Face	High wind pressure hard rock conditions, engineering drilling
SP	High Air Pressure (HAP)	SP780/680/580/480	108~203	Concave Face, Flat Face, Convex Face	Medium and large-scale mining, infrastructure engineering drilling
WK	High Air Pressure (HAP)	WK50/40	108~178	Convex Face, Flat Face, Concave Face	Medium-diameter hard rock drilling, quarrying
BR2	Medium Air Pressure (MAP)		115~152		Medium

Partner With Us for Your Drilling Needs

We prioritize fast delivery, competitive pricing, and personalized support:

Full series availability (no minimum order for standard models).
Customization services (diameter, button type, shank design) for unique project requirements.
Responsive technical support to help you select the right bit for your rock formation and rig specifications.

Contact our sales team today to get a quote or discuss your DTH drill bit requirements – we’ll ensure you get the right tool to maximize your drilling efficiency.