High air pressure down hole drill is a kind of high efficient rock drilling tool which combines high pressure pneumatic impact and hard alloy wear-resisting design.
Structural characteristics
High-pressure pneumatic systems integrated with impactors
The drill bit has an integrated high-pressure pneumatic impactor, the working air pressure is usually ≥1.0 MPa, through the compressed air-driven piston high-frequency impact (up to thousands of times per minute), generating shock waves to break the rock. The impactor is connected to the drill body by splines or threads to ensure the stability of power transmission and torsional strength.
Diversified face design
We accept customization
The shape of the drill bit face directly affects the drilling efficiency and straightness of the drill hole, which is mainly categorized into four types:
Convex type
the end face is convex, suitable for medium-hard to hard rock, high drilling rate but poor drilling straightness;
concave type
the end face has a conical depression in the center, which improves alignment through nucleation, good drilling straightness, high powder discharge efficiency, and is the mainstream design in the market
flat end face, robust, suitable for hard rock but requires auxiliary guidance;
deep concave center type
end face with deep concave center, suitable for deep hole soft rock, but with lower strength
Carbide teeth and tooth cloth way
We accept customization
Tooth shape selection
tungsten carbide teeth mostly use ball teeth, elastic teeth or mixed cloth teeth, ball teeth are suitable for highly abrasive rocks, elastic teeth are suitable for brittle rocks;
Material and process
the material of tooth body is super hard alloy (e.g. WC-Co matrix), the surface is treated by carburizing, nitriding or laser cladding, the hardness can be up to 50-55 HRC, and the abrasion resistance is improved by more than 30%.
Impact resistance and guiding structure
Tail-end impact end face: withstands the periodic impact of the piston and requires a combination of high hardness and toughness to avoid chipping and spalling;
· Spline connection: the drill and impactor are mated by splines, which both transmit the rotational torque and serve as the drill's movement track, requiring precision machining to minimize wear.
Powder discharge system optimization
The internal design of spiral or straight channel ensures the rapid discharge of debris and reduces the risk of drilling jam. Some models adopt multi-layer channel structure to meet the powder discharge requirements of different rock formations.
High air pressure down hole drilling bits realize high efficiency and long service life through the synergy of high-pressure pneumatic system, diversified end face design, carbide teeth and precise connecting structure. The structural features need to be chosen flexibly according to the rock type, drilling depth and engineering requirements, for example, concave face or deep concave center type drill bits are preferred for deep hole operation, while hard rock environment needs to strengthen the wear resistance of the impact face and tooth body.
The company was established in 2001, It is a manufacturer mainly engaged in Low pressure hammer,Medium pressure hammer ,High pressure DTH hammer, as well as down the hole drilling rig accessories and drill rods.
Adhering to the concept of "win-win cooperation", we have formed strategic partnerships with numerous domestic peers, committed to becoming a one-stop service center, promoting global drilling and production needs, and becoming a technology-based, sharing and mutual assistance company. Thus, D-MININGWELL Supply Chain Co., Ltd. was born. MININGWELL's supply chain covers all excellent rock drilling products in China, from underground drilling to open-pit and deep well drilling, providing one-stop services for global rock drilling companies.
Our products are exported to all parts of the country and highly praised by domestic and foreign users.
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Our address
No. 18 Gaotang Road, Qujiang District, Quzhou City, Zhejiang Province
Phone Number
+8615857099988
seo@dminingwell.com
6-inch high wind pressure down hole drill bit
| Drill head diameter(mm) | Number of air vents | edge tooth | middle teeth | weights(kg) | |
| ND65(DHD360,COP64) | 152 | 2 | 8XΦ18 | 7XΦ16 | 22.0 |
| 165 | 2 | 8XΦ18 | 8XΦ16 | 26.0 | |
| 175 | 2 | 8XΦ18 | 10XΦ16 | 27.0 | |
| 190 | 2 | 10XΦ18 | 12XΦ16 | 28.5 | |
|
203 |
2 | 10XΦ18 | 13XΦ16 | 29.5 | |
| NSD6 | 152 | 2 | 8XΦ16 | 7XΦ16 | 26.0 |
| 165 | 2 | 8XΦ18 | 8XΦ16 | 27.0 | |
| 175 | 2 | 8XΦ18 | 10XΦ16 | 29.0 | |
| 190 | 2 | 10XΦ18 | 12XΦ16 | 32.0 | |
| 203 | 2 | 10XΦ18 | 14XΦ16 | 34.0 | |
| NQL60 | 152 | 2 | 8XΦ18 | 7XΦ16 | 24.0 |
| 165 | 2 | 8XΦ18 | 8XΦ16 | 25.0 | |
|
175 |
2 | 8XΦ18 | 8XΦ16 | 27.0 | |
| 190 | 2 | 10XΦ18 | 12XΦ16 | 29.0 | |
| 203 | 3 | 10XΦ18 | 13XΦ16 | 33.0 | |
| NM6 | 152 | 2 | 8XΦ18 | 8XΦ16 | 22.0 |
| 165 | 2 | 8XΦ18 | 10XΦ16 | 23.0 | |
| 171 | 2 | 8XΦ18 | 10XΦ16 | 24.0 | |
| 190 | 2 | 10XΦ18 | 12XΦ16 | 25.0 | |
| 203 | 2 | 10XΦ18 | 14XΦ16 | 28.0 |
We can design and manufacture the drill according to the customer's different requirements on the diameter size, the number of air holes, the shape of the alloy teeth and the shape of the head of the drill.
