254mm - 381mm DTH Drill Bits High Penetration DTH Hard Stone Drilling Bits
Brand Name:MIROC DTH Rock Drilling Tools
Certification:API
Model Number:NUMA 100 Series DTH Button Bit
Minimum Order Quantity:1 Pieces DTH Button Bit
Delivery Time:20-25 days
Payment Terms:L/C, T/T
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Location:
Beijing Beijing China
Address:
Room9-616, No. 10 Zhenxing Road (MDW Plaza), Changping District, 102200 Beijing, China
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Product Details
New Design DTH Drill Bits For NUMA Series High Air Pressure DTH Hammer
Our tools are widelyused in different drilling applications
including mining,quarrying, water well drilling, geotechnical
industries and etc.
In DTH drilling, the rock drilling bit is a continuation of the
shank, which the rock drill piston strikes directly. Since the
piston is in direct contact with the drill bit, little energy is
lost. This gives DTH drilling a nearly constant penetration rate
regardless of hole length.
Competitive Advantage:
• High grade tungsten carbide inserts
• Bit bodies manufactured from high grade steel and processed using
state-of-the-art CNC machinery and heat treatment
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.
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.
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 | |
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254mm - 381mm DTH Drill Bits High Penetration DTH Hard Stone Drilling Bits
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