HAMMERS

6 Inch Hammers

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.

  1. Center chuck
  2. Stop ring
  3. O-ring
  4. Cylinder
  5. Sticker
  6. Sleeve
  7. Release valve
  8. Damp ring
  9. Spring
  10. Back valve
  11. O-ring
  12. Top Adapter
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

8 Inch Hammers

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 TOOLS

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.

BIT FACE AND SHAPE

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

REAMERS

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RC HAMMER

Technical data

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.

RC DRILL BITS

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