Changsha Tianhe Drilling Tools and Machinery Co.,Ltd.
| Supply Ability | 5000pcs/month |
| Delivery Time | Shipped in 25 days after payment |
| Packaging Details | dth bits are packed by Woodens outer side, and Cartons inner side. |
| Model | 11 7/8" Numa 120 Shank |
| Material | Alloy Steel |
| Processing type | Forging |
| Carbides Shape | Spherical, Ballistic, Parabolic and Conical |
| DTH BIT Colo | Gold,Other Color Like Red , Blue , Black , Yellow Are available |
| Bit Shank | SD12 , DHD112 , NUMA120 , NUMA125 |
| Interchangeable brand | Sandvik, Atlas Copco, Ingersoll-Rand, Halco, Bulroc etc. |
| Bit Diameter | 305mm to 445mm |
| Brand Name | Teamwhole |
| Model Number | 11 7/8" Numa 120 Shank DTH bit SD12 , DHD112 , NUMA120 , NUMA125 |
| Certification | ISO9001:2008 |
| Place of Origin | Changsha,Hunan,China |
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Product Specification
| Supply Ability | 5000pcs/month | Delivery Time | Shipped in 25 days after payment |
| Packaging Details | dth bits are packed by Woodens outer side, and Cartons inner side. | Model | 11 7/8" Numa 120 Shank |
| Material | Alloy Steel | Processing type | Forging |
| Carbides Shape | Spherical, Ballistic, Parabolic and Conical | DTH BIT Colo | Gold,Other Color Like Red , Blue , Black , Yellow Are available |
| Bit Shank | SD12 , DHD112 , NUMA120 , NUMA125 | Interchangeable brand | Sandvik, Atlas Copco, Ingersoll-Rand, Halco, Bulroc etc. |
| Bit Diameter | 305mm to 445mm | Brand Name | Teamwhole |
| Model Number | 11 7/8" Numa 120 Shank DTH bit SD12 , DHD112 , NUMA120 , NUMA125 | Certification | ISO9001:2008 |
| Place of Origin | Changsha,Hunan,China | ||
| High Light | water well bits ，rock boring bits | ||
11 7/8" Shank DTH bit SD12 , DHD112 , NUMA120 , NUMA125 For Water Well and Foundation Drilling
| 1.General Introduction |
Bit 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-around application bit face specifically for medium hard and homogeneous 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 theload and wear on the gauge buttons, but poor hole deviation control.
4. 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. Semi-Ballistic Buttons
2. Ballistic Button
3. Spherical Button
4. Two-step Button
| Raw Material |
Steel:
First class special alloy steel with high strength, heat resistance and wearable
Carbide
The best tungsten carbides from China are commonly applied.
Tungsten carbide from European is also available.
NUMA120-302MM.305MM,311MM,330MM,381MM,430MM with carbides 19mm,20mm,22mm
Can be drilled well in water well drilling,Foundation drilling,piling work etc.
| Specification |
1.Steel Carbide
2.12 years experience
3.Can match to the original bit shank
4.Atlas quality
Photds
Company Details
Business Type:
Manufacturer
Year Established:
2002
Total Annual:
10Million-50Million
Employee Number:
201~300
Ecer Certification：
Active Member
Changsha Tianhe Drilling Tools and Machinery Co., Ltd., is a professional geotechnical drilling tools manufacturer since 2002. We’re located in Jinzhou New District,Ningxiang County, Changsha,Hunan province.Our main products include DTH (down-the-hole) hammers and bits with capacity of drillin... Changsha Tianhe Drilling Tools and Machinery Co., Ltd., is a professional geotechnical drilling tools manufacturer since 2002. We’re located in Jinzhou New District,Ningxiang County, Changsha,Hunan province.Our main products include DTH (down-the-hole) hammers and bits with capacity of drillin...
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