Bit shank: TK12/Numa120/Numa125/SD12/DHD112/QL120
Matched Hammer:JH12/JS12
Bit face: Concave, Drop center
Hole Range: 305-350mm
Drillsphere provides a comprehensive range of drill bits designed for all major DTH shank configurations, characterized by precision engineering,
superior heat-treatment, and high-quality tungsten carbide inserts.
Our advanced manufacturing processes and proprietary heat-treatment techniques guarantee consistent and reliable performance in our drilling
consumables. Each drill bit is equipped with rigorously tested tungsten carbide inserts, ensuring durability and efficiency.
Bits are available with or without a foot valve.
| DTH BIT Face design | ||
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Flat Face | Suitable for general purpose drilling,including hard and abrasive rock formations. |
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Concave Face | Recommended for drilling in soft to hard formations, the concave face design improves stability and reduces vibration, resulting in straighter holes. |
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Convex Face | Suitable for various drilling applications, including soft, medium-hard, and abrasive rock, providing both speed and durability. |
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Drop Center Face | Especially used in large diameter bits to ensure straight holes in piling and foundation drilling. |
| Carbides Shape Option | |
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Spherical |
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Parabolic |
| Drillsphere BITS FOR 12” HAMMER | ||||||
| Bit shank | Diameter | Qty*Button Diameter.mm | Flushing Holes |
Weight (kg) |
||
| mm | inch | Gauge | Front | |||
| DHD112 NUMA120 QL120 SD12 |
305 | 12 | 15*19mm+15*19mm | 12*16mm+Side 30*12mm | 3 | 150 |
| 311 | 12 1/4 | 18*19mm+24*18mm | 9*16mm+Side 15*14mm | 3 | 158 | |
| 330 | 13 | 24*19mm+12*20mm | 15*18mm+Side 15*14mm | 3 | 170 | |
| 350 | 13 3/4 | 24*19mm+15*18mm | 15*16mm+Side 18*14mm | 3 | 179 | |
| 381 | 15 | 30*19mm+15*18mm | 21*16mm+Side 18*14mm | 3 | 205 | |
| 400 | 15 3/4 | 30*19mm+18*19mm | 22*16mm+Side 30*12mm | 3 | 205 | |
