DTH bit is also our main product. After mang years search, we have rich experience in development and manufacturing high quality products, which adopted high-quality raw materials, advanced technology and passed through strictly inspection.
1.Various 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: drop center / concave / convex / double gauge / flat
Technical Data:
| Drill Bits | Bit Dia. (mm) | NO.Air Holes | Gauge Buttons | Front Buttons | Weight (KGS) | Part No. |
| BR1 | 64 | 2 | 6×φ10 | 3×φ10 | 2.6 | HBR1-64 |
| 70 | 2 | 6×φ12 | 4×φ9 | 2.8 | HBR1-70 | |
| 76 | 2 | 6×φ12 | 5×φ10 | 3.2 | HBR1-76 | |
| BR2 | 76 | 2 | 6×φ12 | 5×φ10 | 3.6 | HBR2-76 |
| 80 | 2 | 6×φ13 | 5×φ10 | 4 | HBR2-80 | |
| 90 | 2 | 6×φ13 | 6×φ10 | 4.2 | HBR2-90 | |
| HD25 | 76 | 2 | 6×φ13 | 5×φ10 | 3.6 | HD25-76 |
| 82 | 2 | 6×φ14 | 4×φ11 | 4 | HD25-82 | |
| 90 | 2 | 8×φ12 | 5×φ12 | 4.2 | HD25-90 |
We can design and manufacture according to customer's requirement of the bit dia, no.of air holes, carbide button shape and face shape.
How to choose a DTH bits for your demand:
How to Select DTH BITS FACE SHAPE AND CARBIDE BUTTON SHAPE
A: Bit face shape selection
DropCenter Bit
For high penetration rates in soft to medium-hard and fissured rock formations. Low to medium air pressures. Maximum hole deviation control.
Concave face
The all-round application bit face specifically for medium hard and homogenerous rock formations. Good hole deviation control and good flushing capacity.
Convex face
For high penetration rates in soft to medium-hard with low to medium air pressures. It is the most resistance to steel wash, and may reduce the load and wear on the gauge buttons, but poor hole deviation control.
Double Gauge face
This kind of face shape is suitable for fast penetration rates in medium to hard rock formations. Designed for high air pressures and good resistance to steel wash step gauge bit.
Flat Face Bit
This kind of face shape is suitable for hard to very hard and abrasive rock formations in applications with high air pressures. Good penetration rates an resistance to steel wash.
B: Insert Carbide Button Shape Selection
Matching the insert to the job requirements is essential in achieving the desired results.
Different buttons is ideal for different ground conditions, abrasion levels, PSIs and penetration levels. In general, the larger the number of gauge buttons the better overall performance, especially in hard rock.
Hemispherical
• Height 0.5 Ø
• Application Strength - multipurpose
• Best suited to hard ground
• 25,000 to 45,000 PSI (170 to 300 MPa)
• Abrasive to very abrasive
Ballistic Button
• Height 0.75 Ø
• Application Strength - fast penetration
• Best suited to soft ground
• 10,000 to 20,000 PSI (70 to 140 MPa)
• Non abrasive ground
Parabolic Button (semi ballistic)
• Height 0.6 Ø
• Application Strength - fast penetration
• Best suited to medium ground
• 15,000 to 25,000 PSI (100 to 170 MPa)
• Mildly abrasive ground
Conical Button
• Height 0.65 Ø
• Application Strength – fast penetration
• Suited for all non-abrasive ground types
• Smaller contact area
• Best suited for smaller diameter bits
This Middle air pressure DTH hammer can be used in such industies as energy, transportation, building, quarrying etc.
Packing details can be customized as per your requirement (it could be plywood case, plastic box or carton...)
Timely shipment can be made upon our negotiation
Xiamen Bestlink Factory Co., Ltd. is committed to providing the best drilling and cutting machines, tools and accessories products in marble and granite stone quarrying, as well as in civil engineering application, especial demolition project. Our company is now a leading manufacturer of cutting and drilling equipment for the extraction of marble, granite and ornamental stones in China.
1. Our factory has been specialized in manufacturing drilling and cutting machine and spare parts since 1980.
2. We have advanced technology and equipment.
3. Our technician has more than 36 year’s professional working experience.
4. Main Market: Brazil, Chile, Colombia, Uruguay, Australia, Ukraine, Ruassia, Norway, Turkey, USA, Canada, Iran, Malaysia, Thailand, India, etc.
The information you may like to know before order:
1. Methods of Payment
T/T (Telegraphic Transfer) or Western Union or L/C at sight.
2. Delivery Time
Based on order quantity, normally it takes 25 days for production.
Only 2 or 3 days if we have stock on your request model and size.
3. Shipping way
Sample order: we suggest Courier express like DHL/UPS/TNT/FEDEX or by air
Bulk order: we suggest by air or by sea.
4. Quality Control
We have our own experienced QC.
There will be strict inspection and testing for every order before shipping out.
5. After Services:
1) Our sales team will response for your question within 24 hours (Holidays Excluded)
2) Technical Support will be available in any time.