DTH Hammer Bits 330mm Numa100 DTH Bit Rock Drill Bits For Drilling
Product specifications: Numa100 DTH bits
| Item | Bit Dia
(mm) | No. Of
Air Holes | Gauge
Buttons | Front
Buttons | Weight
(Kg) |
| Numa100 | 254 | 3 | 12×Φ18 | 20×Φ16 | 90.0 |
| 305 | 4 | 12×Φ18 | 36×Φ16 | 102.0 |
| 311 | 4 | 12×Φ18 | 36×Φ16 | 104.0 |
| 318 | 4 | 12×Φ18 | 38×Φ16 | 106.0 |
| 330 | 4 | 16×Φ18 | 42×Φ16 | 112.0 |
For 10" hammer
DTH bits shank | Bit Dia. | Air Holes
No. | Gauge
Buttons | Front
Buttons | Weight
(Kg) | Part No. |
| mm | inch |
| SD10 | 254 | 10" | 3 | 12×φ18 | 20×φ16 | 108.0 | SD10-254 |
| 305 | 12" | 4 | 12×φ18 | 36×φ18 | 125.0 | SD10-305 |
| 311 | 12 1/4" | 4 | 12×φ18 | 36×φ16 | 130.0 | SD10-311 |
| 318 | 12 1/2" | 4 | 12×φ18 | 38×φ16 | 142.0 | SD10-318 |
| 330 | 13" | 4 | 16×φ18 | 42×φ16 | 155.0 | SD10-330 |
| NUMA100 | 254 | 10" | 3 | 12×φ18 | 20×φ16 | 90.0 | Numa100-254 |
| 305 | 12" | 4 | 12×φ18 | 36×φ18 | 102.0 | Numa100-305 |
| 311 | 12 1/4" | 4 | 12×φ18 | 36×φ16 | 104.0 | Numa100-311 |
| 318 | 12 1/2" | 4 | 12×φ18 | 38×φ16 | 106.0 | Numa100-318 |
| 330 | 13" | 4 | 14×φ18 | 42×φ16 | 112.0 | Numa100-330 |
The characteristics of high air pressure DTH Button Bit:
1. Deliver maximum energy to drilling bit, fast drilling speed and
low air consumption due to inner structure of HD series DTH hammer
designed according to newest rock drilling theory.
2. Smooth performance and long service life of HD series DTH hammer
due to high quality alloy steel materials and advanced processing
technology adapted.
3. Low problem rate and easy to maintenance due to simple ,
reliable and easy assemble and disassemble inner structure of
hammer.
4. Easy to depart bit from hammer due to multi-head thread
connecting chuck and cylinder of hammer.
5. Interchangeable with DTH bit and dill pipe manufactured by Atlas
copco and Ingersoll-rand.
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-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
Product photos
