DTH bit is our company main product. After many years search, we have rich experience in development and manufacture which adopted high-quality raw materials, advanced craft technology and passed through strictly inspection, manufacturing high quality products.

We can supply you with drill DTH drilling tools with high, medium and low air pressure, symmetric drilling tools, eccentric drilling tools, standardized API system casing tube, button bit, bit shank & adaptor of which are fit for hydraulic drilling equipment.

Our DTH High pressure drill bit has passed the ISO9001 quality management system and are widely used in open pit mining, tunnels, quarrying, transportation construction, engineering, earthwork excavation, water wells, pile foundations, civil engineering and other fields. We are one of the companies with the most complete product lines, the most abundant varieties and the most widely used products in the drilling industry.

Wide range of DTH High pressure drill bit uses:
The drill bit is suitable for soft and hard carbonate rock, limestone, chalk, claystone, siltstone, sandstone, etc. Each drill is made from high quality alloy steel and is precision machined to produce a perfect body, heat treated to the desired hardness and given surface compression for fatigue resistance. These are designed for specific applications for all rock types, hardness and conditions.

1. High and low air pressure down-the-hole drill bits.
2. Low air pressure hole Dia.: 65-220mm.
3. High air pressure hole Dia.: 85-305mm.
4. Face type: concave/convex/flat.
5. Bit Shank Series: COP, DHD, QL, SD, Mission, TD, BR etc.
6. Button Shape: Dome/Spherical, Ballistic

Bit head design and selection:

Bit Head Face Type		Application
	Flat Front Spherical	For drilling in hard and abrasive rock
	Flat Front Spherical + Ballistic	For drilling in medium-hard to hard and moderately abrasive rock
	Convex Front Spherical + Ballistic	For drilling in medium-hard to hard and moderately abrasive rock
	Convex Front Ballistic	For drilling at high penetration rates in nonabrasive rock
	Concave Front Spherical	For drilling in medium-hard, minimum hole deviation control

Bit Shank Series	Bit Size (mm)	Splines Quantity	Matchable Hammer Model
DHD3.5	90; 110;105	8	TND-IR3.5
DHD340A	108; 115; 121; 127; 130	8	TND-IR340
DHD350R	140; 148; 152	8	TND-IR350
DHD360	155; 159; 165; 178; 190; 203	8	TND-IR360
DHD380	194; 203; 216; 219; 222; 254; 270; 305	10	TND-IR380
QL40	108; 115; 121; 127; 130	10	TND-QL40
QL50	140; 148; 152	12	TND-QL50
QL60	155; 159; 165; 178; 190; 203	12	TND-QL60
QL80	194; 203; 216; 219; 222; 254; 270; 305	16	TND-QL80
SD4	108; 115; 121; 127; 130	8	TND-SD4
SD5	140; 148; 152	8	TND-SD5
SD6	155; 159; 165; 178; 190; 203	8	TND-SD6
SD8	194; 203; 216; 219; 222; 254; 270; 305	8	TND-SD8