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12" Numa Down The Hole Numa120 DTH Button Drill Bits For Rock Drilling

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12" Numa Down The Hole Numa120 DTH Button Drill Bits For Rock Drilling

Brand Name : SOLLROC

Model Number : Numa120 dth bits

Certification : SGS

Place of Origin : China

MOQ : 1 set

Supply Ability : 30000 sets per month

Delivery Time : 3-4 weeks

Packaging Details : Cartons + ply wood case (no plastic)

Product name : Numa120 dth bits

Diameter : 302mm, 311mm, 330mm, 356mm,381mm

Air pressure : 10-30 bar

Applications : waterwell drilling and rock drilling

Face shape : Flat, Convex, Concave

Keyword : Numa120 bit

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12" Numa Down The Hole Numa120 DTH Button Drill Bits For Rock Drilling

Product specifications: Numa120 dth bits

For 12" hammer
DTH bits shank
Bit Dia. No
Air
Holes.
Gauge
Buttons
Front
Buttons
Weight
(Kg)
Part No.
mm inch
DHD1120 305 12" 4 12×φ18 36×φ16 152.0 DHD1120-305
311 12 1/4" 4 12×φ18 36×φ16 157.0 DHD1120-311
330 13" 4 16×φ18 42×φ16 165.0 DHD1120-330
356 14" 4 16×φ19 48×φ16 178.0 DHD1120-356
381 15" 4 16×φ19 48×φ18 198.0 DHD1120-381
SD12 305 12" 4 12×φ18 36×φ16 156.0 SD12-305
311 12 1/4" 4 12×φ18 36×φ16 168.0 SD12-311
330 13" 4 16×φ18 42×φ16 180.0 SD12-330
356 14" 4 16×φ19 48×φ16 191.0 SD12-356
381 15" 4 16×φ19 48×φ18 200.0 SD12-381
NUMA120 305 12" 4 12×φ18 36×φ16 152.0 NUMA120-305
311 12 1/4" 4 12×φ18 36×φ16 158.0 NUMA120-311
330 13" 4 16×φ18 42×φ16 165.0 NUMA120-330
356 14" 4 16×φ19 48×φ16 178.0 NUMA120-356
381 15" 4 16×φ19 48×φ18 195.0 NUMA120-381
NUMA125 305 12" 4 12×φ18 36×φ16 170.0 NUMA125-305
311 12 1/4" 4 12×φ18 36×φ16 173.0 NUMA125-311
330 13" 4 16×φ18 42×φ16 182.0 NUMA125-330
356 14" 4 16×φ19 48×φ16 191.0 NUMA125-356
381 15" 4 16×φ19 48×φ18 200.0 NUMA125-381


Product photos


12" Numa Down The Hole Numa120 DTH Button Drill Bits For Rock Drilling

it 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

Shank style Diameter in mm Flushing holes No. Gauge buttons Face buttons Approx.weight


NUMA120
305 4 12*18mm 36*16mm 152.0kg
311 4 12*18mm 36*16mm 158.0kg
330 4 16*18mm 42*16mm 165.0kg
356 4 16*19mm 48*16mm 178.0kg
381 4 16*19mm 48*18mm 195.0kg

We are a leading manufacturer of rock drilling tools, like DTH hammers and bits, DTH drill pipes, RC hammers and bits, tophammer button bits, coupling, cross bits, drill rods located in Changsha, Hunan, China.
We have rich experience in this field of DTH hammers and bits for 20 years.
Owing to high quality, professional serivce and competitive price, we have gotten good reputation from our customers from all over the world, such as France, Spain, Italy, South Africa, Iran, Malaysia, Australia ad etc.


Product Tags:

oil well drilling tools

      

water well drilling tools

      
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