Changsha Sollroc Engineering Equipments Co., Ltd
| Supply Ability | 30000 sets per month |
| Delivery Time | 3-4 weeks |
| Packaging Details | Cartons + ply wood case (no plastic) |
| Product name | Numa120 dth bits |
| Diameter | 302mm, 311mm, 330mm, 356mm,381mm |
| Air pressure | 10-30 bar |
| Applications | waterwell drilling and rock drilling |
| Face shape | Flat, Convex, Concave |
| Keyword | Numa120 bit |
| Brand Name | SOLLROC |
| Model Number | Numa120 dth bits |
| Certification | SGS |
| Place of Origin | China |
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Product Specification
| Supply Ability | 30000 sets per month | Delivery Time | 3-4 weeks |
| Packaging Details | Cartons + ply wood case (no plastic) | Product name | Numa120 dth bits |
| Diameter | 302mm, 311mm, 330mm, 356mm,381mm | Air pressure | 10-30 bar |
| Applications | waterwell drilling and rock drilling | Face shape | Flat, Convex, Concave |
| Keyword | Numa120 bit | Brand Name | SOLLROC |
| Model Number | Numa120 dth bits | Certification | SGS |
| Place of Origin | China | ||
| High Light | oil well drilling tools ，water well drilling tools | ||
12" Numa Down The Hole Numa120 DTH Button Drill Bits For Rock Drilling
Product specifications: Numa120 dth bits
| For 12" hammer DTH bits shank | Bit Dia. | No Air Holes. | Gauge Buttons | Front Buttons | Weight (Kg) | Part No. | |
| mm | inch | ||||||
| DHD1120 | 305 | 12" | 4 | 12×φ18 | 36×φ16 | 152.0 | DHD1120-305 |
| 311 | 12 1/4" | 4 | 12×φ18 | 36×φ16 | 157.0 | DHD1120-311 | |
| 330 | 13" | 4 | 16×φ18 | 42×φ16 | 165.0 | DHD1120-330 | |
| 356 | 14" | 4 | 16×φ19 | 48×φ16 | 178.0 | DHD1120-356 | |
| 381 | 15" | 4 | 16×φ19 | 48×φ18 | 198.0 | DHD1120-381 | |
| SD12 | 305 | 12" | 4 | 12×φ18 | 36×φ16 | 156.0 | SD12-305 |
| 311 | 12 1/4" | 4 | 12×φ18 | 36×φ16 | 168.0 | SD12-311 | |
| 330 | 13" | 4 | 16×φ18 | 42×φ16 | 180.0 | SD12-330 | |
| 356 | 14" | 4 | 16×φ19 | 48×φ16 | 191.0 | SD12-356 | |
| 381 | 15" | 4 | 16×φ19 | 48×φ18 | 200.0 | SD12-381 | |
| NUMA120 | 305 | 12" | 4 | 12×φ18 | 36×φ16 | 152.0 | NUMA120-305 |
| 311 | 12 1/4" | 4 | 12×φ18 | 36×φ16 | 158.0 | NUMA120-311 | |
| 330 | 13" | 4 | 16×φ18 | 42×φ16 | 165.0 | NUMA120-330 | |
| 356 | 14" | 4 | 16×φ19 | 48×φ16 | 178.0 | NUMA120-356 | |
| 381 | 15" | 4 | 16×φ19 | 48×φ18 | 195.0 | NUMA120-381 | |
| NUMA125 | 305 | 12" | 4 | 12×φ18 | 36×φ16 | 170.0 | NUMA125-305 |
| 311 | 12 1/4" | 4 | 12×φ18 | 36×φ16 | 173.0 | NUMA125-311 | |
| 330 | 13" | 4 | 16×φ18 | 42×φ16 | 182.0 | NUMA125-330 | |
| 356 | 14" | 4 | 16×φ19 | 48×φ16 | 191.0 | NUMA125-356 | |
| 381 | 15" | 4 | 16×φ19 | 48×φ18 | 200.0 | NUMA125-381 | |
Product photos
it face shape selection:
1. Drop Center Bit
For high penetration rates in soft to medium hard and fissured rock formations. Low to medium air pressures. Maximum hole deviation control.
2. Concave Face
The all-round application bit face specifically for medium hard and homogenerous rock formations. Good hole deviation control and good flushing capacity.
3. 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.
4. 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.
5. 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.
Carbide button shape selection:
1. Domed/Round Button
2. Parabolic/Semi-Ballistic Buttons
3. Ballistic Button
4. Sharp Button
5. Flat Button
| Shank style | Diameter in mm | Flushing holes No. | Gauge buttons | Face buttons | Approx.weight |
NUMA120 | 305 | 4 | 12*18mm | 36*16mm | 152.0kg |
| 311 | 4 | 12*18mm | 36*16mm | 158.0kg | |
| 330 | 4 | 16*18mm | 42*16mm | 165.0kg | |
| 356 | 4 | 16*19mm | 48*16mm | 178.0kg | |
| 381 | 4 | 16*19mm | 48*18mm | 195.0kg |
We are a leading manufacturer of rock drilling tools, like DTH hammers and bits, DTH drill pipes, RC hammers and bits, tophammer button bits, coupling, cross bits, drill rods located in Changsha, Hunan, China.
We have rich experience in this field of DTH hammers and bits for 20 years.
Owing to high quality, professional serivce and competitive price, we have gotten good reputation from our customers from all over the world, such as France, Spain, Italy, South Africa, Iran, Malaysia, Australia ad etc.
Company Details
Business Type:
Manufacturer,Exporter
Year Established:
2006
Total Annual:
10000000-50000000
Employee Number:
600~700
Ecer Certification：
Verified Supplier
Sollroc, with more than 10 years of experience, is one of the prefessional manufacturer and supplier of high performance rock drilling tools like, DTH hammers and bits, RC hammers and bits, ODEX system, symmetrix system, DTH drill rods and top hammer drilling tools, our tools are widely used in di... Sollroc, with more than 10 years of experience, is one of the prefessional manufacturer and supplier of high performance rock drilling tools like, DTH hammers and bits, RC hammers and bits, ODEX system, symmetrix system, DTH drill rods and top hammer drilling tools, our tools are widely used in di...
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