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4 Inch High Air Pressure DTH Bits
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Description:

Brief introduction of our DTH drill bits:

We specialize in down-the-hole (DTH) hammers and DTH hammers for more than 20 years. Combined with a down-the-hole hammer, the drill bit is designed with a spline drive, which can rotate the bit underground. We have DTH, Mission, QL and SD series DTH hammers and drill bits. In addition, we can manufacture according to your requirements.

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Product Detail
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Our High air pressure DTH drill bits
Bits diameter Shank
Metric Inch
1" 64mm-70mm 2 1/2"-2 3/4" BR1
2" 70mm-95mm 2 3/4"-3 3/4" MACH20/BR2
3" 90mm-102mm 3 1/2"-4" COP32/COP34/MACH303
M30/DHD3.5/BR3
4" 105mm-152mm 4 1/8"-6" COP44/DHD340/MACH44
SD4/M40/QL40
5" 133mm-165mm 5 1/4"-6 1/2" COP54/DHD350R/MACH50
SD5/M50/QL50/BR5
6" 152mm-254mm 4 1/8"-10" COP64/DHD360/SD6
M60/QL60/Bulroc BR6
8" 203mm-330mm 8"-13" COP84/DHD380/SD8
QL80/M80
10" 254mm-380mm 10"-15" SD10
NUMA100
12" 305mm-508mm 12"-20" DHD1120/SD12
NUMA120/NUMA125
Specifications of 4 inch DTH drill bit
4 inch Middle Air Pressure DTH Bits
DHD340A (COP44) THE Drill Head Diameter(mm) NO.Air Holes Gauge Buttons Front Buttons Weight(KG)
105 2 6XØ14 5XØ13 8.5
110 2 7XØ14 6XØ13 8.8
115 2 7XØ14 7XØ13 9
120 2 8XØ14 7XØ13 9.8
127 2 8XØ14 7XØ14 11
SD4 105 2 6XØ14 5XØ13 9
110 2 7XØ14 6XØ13 9.5
115 2 7XØ14 7XØ13 9.8
120 2 8XØ14 7XØ13 11.5
127 2 8XØ14 7XØ14 12.3
QL40 105 2 6XØ14 5XØ13 9
110 2 7XØ14 6XØ13 9.2
115 2 7XØ14 7XØ13 9.5
120 2 8XØ14 7XØ14 10.3
127 2 8XØ14 7XØ14 11.5
Mission 40 105 2 6XØ14 5XØ13 6
110 2 7XØ14 6XØ13 6.2
115 2 7XØ14 7XØ13 6.6
120 2 8XØ14 7XØ13 7
127 2 8XØ14 7XØ14 7.4

Package

Picture of 4 inch DTH drill bit

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OUR SERVICE
☑ We will provide more precisely and efficiently manufacture and serve according to clients' drawings.
☑ We have professional QC team to ensure your product more better.
☑ Check the raw material before starting production.
☑ Have the random inspection during the processing.
☑ Make the 100% inspection before the shipments.
WHY ARE YOU CHOOSE US
☑ We have been engaged in tapered cross bit for more than 20 years.
☑ apered cross with conical pipe drilling perfect;
☑ Reliable work, high cost performance;
☑ Accurate the dimension of taper degree perfectly matches the rods;
☑ High grade tungsten carbide inserts;
☑ The drill bit is made of high quality steel and uses the most advanced CNC machinery and heat treatment process.
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