Produce high-quality products and provide high-quality services
Zhuzhou Changhong Mining Machinery Offer Best In Class Drilling Machines
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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 |
| Picture of other products |
| 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. |
| about uS |
| FAQ |
To work with us is your best choice !
