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New Design DTH Drill Bits For NUMA Series High Air Pressure DTH Hammer
We can design and manufacture the personalized products to meet your specical apllication, such as changing the tungsten carbide insert profile (spherical, ballistic, etc.), face profile (flat face, concave, convex, etc.), and flushing holes.
Color: Green,Blue or Based on Customer requirements
NUMA Series DTH Bit Specification:
| NUMA Series DTH Button Bit | ||||||
| DTH Button Bit | Diameter | Buttons and Size (mm) | Flushing hole | Weight | ||
| mm | inch | Front | Gauge | kg | ||
| Numa100 | 254 | 10 | 21x16 | 12x18 | 2 | 90.0 |
| 305 | 12 | 36x16 | 12x18 | 4 | 102.0 | |
| 311 | 12 1/4 | 36x16 | 12x18 | 4 | 104.0 | |
| 318 | 12 1/2 | 38x16 | 12x18 | 4 | 106.0 | |
| 330 | 13 | 42x16 | 14x18 | 4 | 112.0 | |
| NUMA120 | 305 | 12 | 12x18 | 36x16 | 4 | 152.0 |
| 311 | 12 1/4 | 12x18 | 36x16 | 4 | 158.0 | |
| 330 | 13 | 16x18 | 42x16 | 4 | 165.0 | |
| 346 | 13 5/8 | 16x19 | 48x16 | 4 | 178.0 | |
| 381 | 15 | 16x19 | 48x16 | 4 | 195.0 | |
| NUMA125 | 305 | 12 | 12x18 | 36x16 | 4 | 170.0 |
| 311 | 12 1/4 | 12x18 | 36x16 | 4 | 173.0 | |
| 330 | 13 | 16x18 | 42x16 | 4 | 182.0 | |
| 346 | 13 5/8 | 16x19 | 48x16 | 4 | 191.0 | |
| 381 | 15 | 16x19 | 48x16 | 4 | 200.0 | |
Competitive Advantage
Applications
• Underground mining
• Down the hole rock drilling
Bit Face Shape Selection:
Center Drop Face
For high penetration rates in soft to medium hard and fissured rock formations. Low to medium air pressure.
Maximum hole deviation control.
Concave Face
The all-around application bit face specifically for medium hard and homogenerous rock formations.
Good hole deviation control and good flushing capacity.
Convex Face
For high penetration rates in soft to medium-hard with low to medium air pressure. It is the most resistance to steel wash, any may reduce the load and wear on gauge buttons, but poor hole deviation control.
Double Gauge Face
This kind of face shape is suitable for fast penetration rates in medium to hard rock formations. Designed for high air pressure and good resistance to steel wash step gauge bit.
Flat Face Bit
This kind of face shape is suitable for hard to very hard and abrasive rock formation is applications with high air pressure. Good penetration rates and resistance to steel wash.
Contact Information:
Alice Zhang
Mobile/Whatsapp: +86 182 0101 1129
SKYPE: alice.zhang1106
