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English Views: 1 Author: Site Editor Publish Time: 2020-09-23 Origin: Site
DTH bit is our main product. After many years searched, we have rich experience in development and manufacturing high quality products, which adopted high-quality raw materials, advanced technology and passed through strictly inspection.
1.high and low air pressure down-the-hole drill bits
2.Low air pressure hole Dia.:65-220mm
3.Face type: drop center / concave / convex / double gauge / flat
Technical Data:
CIR series low air pressure DTH bits:
| Type | Dia. | Spline No. | Weight (Kg) |
| CIR65 | 68 | 6 | 2.5 |
| CIR70 | 76 | 6 | 3.4 |
| CIR80 | 83 | 6 | 3.45 |
| CIR80X | 83 | 6 | 3.5 |
| CIR90 | 90 | 6 | 3.5 |
| CIR90 | 100 | 6 | 4.5 |
| CIR90 | 130 | 6 | 9.5 |
| CIR110 | 110 | 6 | 6.4 |
| CIR110 | 123 | 6 | 8.5 |
| CIR110W | 110 | 6 | 6.5 |
| CIR110W | 123 | 6 | 8.8 |
| CIR150 | 155 | 6 | 12 |
| CIR150A | 155 | 6 | 12.5 |
| CIR150A | 165 | 6 | 14 |
| CIR170 | 175 | 6 | 15.5 |
| CIR170A | 185 | 6 | 16 |
| CIR200W | 200 | 6 | 48 |
J series low air pressure DTH bits:
| Type | Dia. | Spline No. | Weight (Kg) |
| J60C | 65 | 4 | 2.26 |
| J70C | 75 | 4 | 2.8 |
| J80B | 85 | 4 | 3.2 |
| J80B | 90 | 4 | 4.8 |
| J100B | 110 | 4 | 5.04 |
| J100B | 115 | 4 | 5.5 |
| J100B | 120 | 4 | 6.25 |
| J150B | 155 | 4 | 14 |
| J150B | 160 | 4 | 15.5 |
| J150B | 165 | 4 | 22 |
| J170B | 170 | 4 | 24.5 |
| J170B | 180 | 4 | 28.6 |
| J200B | 210 | 4 | 43.5 |
| J200B | 220 | 4 | 45 |
----Selection of DTH BIT FACE SHAPE AND CARBIDE BUTTON SHAPE----
A: Bit face shape selection
DropCenter Bit
For high penetration rates in soft to medium-hard and fissured rock formations. Low to medium air pressures. Maximum hole deviation control.
Concave face
The all-round 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 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.
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.
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.
