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Netbit supplies one of the most robust and state of the art down the hole hammers. Our hammers have been tested in some of the world’s toughest formations and have shown some significant results. Our latest test was done on our NET-DMS6.5 QL60 MH577 at Assmang’s Khumani Mine, and it managed to drill up to 9 200m on ore without being serviced. This particular hammer was modified for the tough iron ore formation found in the Northern Cape South Africa.
| Part Name | Weight kg | Part,# |
|---|---|---|
| 1. Chunk Nut | 7,5 NET | 557.01 |
| 2. Bit Retainer | 0,6 NET | 557.03 |
| 3. Seal | 104-110-36-2-2 ГОСТ | |
| 4.Inner Bush | 5,3 NET | 557.04 |
| 5. Cylinder | 42,8 NET | 557.02 |
| 6. Stroke | 24,3 NET | 557.05 |
| 7. Inner Sleeve | 5,4 NET | 557.06 |
| 8. O-ring | O-ring 95×3,5 | |
| 9. Air Distributor | 4,2 NET | 557.07 |
| 10. Spring | 0,05 NET | 533.11 |
| 11. Water valve | 0,5 NET | 557.09 |
| 12. O-ring | O-ring 34,3×5,33 | |
| 13. Seal | 118-124-36-2-2 ГОСТ 18829-73 | |
| 14. Top Adapter | 19,8 NET | 557.40 |
Netbit also stocks 8 Inch hammers for drilling larger diameter holes. Some of our hammers are working on Catoca in Angola, as well as other sites in Africa. These hammers are also as robust as our 6 Inch hammers, and they are manufactured and modified to customer specifications.
| Part Name | Weight kg | Part,# |
|---|---|---|
| 1. Chunk Nut | 7,5 NET | 557.01 |
| 2. Bit Retainer | 0,6 NET | 557.03 |
| 3. Seal | 104-110-36-2-2 ГОСТ | |
| 4.Inner Bush | 5,3 NET | 557.04 |
| 5. Cylinder | 42,8 NET | 557.02 |
| 6. Stroke | 24,3 NET | 557.05 |
| 7. Inner Sleeve | 5,4 NET | 557.06 |
| 8. O-ring | O-ring 95×3,5 | |
| 9. Air Distributor | 4,2 NET | 557.07 |
| 10. Spring | 0,05 NET | 533.11 |
| 11. Water valve | 0,5 NET | 557.09 |
| 12. O-ring | O-ring 34,3×5,33 | |
| 13. Seal | 118-124-36-2-2 ГОСТ 18829-73 | |
| 14. Top Adapter | 19,8 NET | 557.40 |
Top Hammer Drill bits and reamers are intended for drilling operations on rotary percussion drilling machines, such as Solo, Simba, Pantera, Ranger, Roc, with a surface hydraulic or pneumatic hammer drill.
These bits allow drilling of holes with diameters from 28 to 200 mm, and depths of up to 40 m, for various purposes, primarily explosive, in open pits and underground mines.
| Thread type | Diameter, мм
Drill bit |
Reamer |
Application |
|---|---|---|---|
| R32 | 41, 43, 45, 48, 51, 57, 64,76 | 89; 102; 127 | Drilling through holes in mines; drilling depth up to 6m. Well drilling up to 50 m. |
| R35 | 43, 45, 48, 51, 54, 57, 64 | 89; 102; 127 | Drilling through holes in mines; drilling depth up to 6m. |
| T35 | 48, 51, 54, 57, 64 | - | Drilling through holes in mines; drilling depth up to 6m. |
| T38 | 64, 70, 76, 89, 102, 127 | 102; 127 | Drilling technological wells in open cast mining; drilling depth up to 10 m. On underground mining, drilling depth up to 20m. |
| T45 | 70, 76, 89, 102, 127 | 127; 152 | Drilling technological wells in open cast mining; drilling depth up to 15 m. On underground mining; drilling depth up to 25m. |
| T51 | 89, 102, 115, 127 | 152; 200 | Drilling technological wells in open and underground mining; drilling depth up to 40m. |
| ST58 | 89, 102, 152 | 152 | Drilling technological wells in underground mining; drilling depth up to 40m. |
| T60 | 92, 96, 102, 115, 127, 140 | - | Drilling technological wells in open cast mining; drilling depth up to 20 m. |
Nsimbi Equipment Traders can supply all these top hammer bits manufactured in Russia for our rock tool brand Netbit.
Our approach to these tools is to understand our customer’s challenges by performing rigorous tests on-site, and then custom make tools suitable for the site. Continuous research and development have to carry on to improve our customer experience with regard to our drilling tools. We also supply accessories including shanks and couplings.
Flat
For rocks of medium and hard strength, as well as abrasive rocks.
Lowered Center
It is recommended to be used for drilling in medium abrasive formations from soft to medium strength. Lowered center reduces well curvature. The flash holes are more protected from “sticking”, which ensures effective well purging, better sludge removal, that is, a longer drill bit life and a higher drilling speed
Convex
For rocks of medium strength. High-speed drilling in soft rock.
Smooth
cylindrical body
Suitable for homogeneous rocks with medium and high strength.
Retrak
Special slots with cutting edges on the Drill bit “skirt” exclude this type of well curvature, calibrate diameter wells to prevent jamming drill stave as well increase speed drifting and fractured rocks.
Sectional
Ø89 … Ø127 mm.
They are used to expand compensation (hole) wells in sinking drilling; complemented by pilot drill bits Ø43 mm, Ø45 mm.
Solid
Ø89 … Ø127 mm.
They are used to expand compensation (hole) wells in sinking drilling.
Entire
Ø152 … Ø200 mm.
They are used to expand compensation wells in clean-up drilling, as well as to expand wells for technological needs
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Outer hammer diamter, mm
Shank type
Lengt, mm
Weight, kg
Connecting thread
116
MR116
1187
72
Metzke 4”
The spare parts kits for our RC Hammers are always readily available and can be delivered anywhere in Africa within a limited time.
Netbit also carries a wide range of RC bits and careful selection for our customers is always done according to formation. We have a range of 124-222mm in diameter.
Drill bits for high-pressure down-the-hole hammer with reverse circulation:
| Image | Denomination | Bit nomial diamter, mm | Periphery inclination angle, degree | Hard Alloy | Number blow-off holes | Length, mm | Weight, kg | ||
|---|---|---|---|---|---|---|---|---|---|
| Peripheral | Frontal | ||||||||
 |
KNSH-124 RCI01 MH 899.00 | 124 | 35 | Semisphere | 2 | 301 | 11.4 | ||
| 8 x 014 | 4 x 012 4 x 014 | ||||||||
| KNSH-127 MR116 MH 865.00 | 124 | 35 | Semi sphere | Semi sphere | Semi ballistic | 2 | 317 | 14.0 | |
| 8 x 016 | 6 x 014 | 3 x 012 | |||||||
| KNSH-127 MR116 MH 865.00 | 127 | 8 x 016 | 6 x 014 | 3 x 012 | 14.1 | ||||