Foot Valve Free QL40 DTH Bit
Shank compatible: QL40 DTH hammer
Bit size: 4inch
Bit diameter: 115mm,125mm, 127mm, 130mm
Bit face design: convex, flat
Colour: Gold / Customization
Country of Origion: China
General Introduction
The QL40 DTH bit is one of down the hole drill bit designed to match QL40 hammers. With a outer diameter range of 115mm to 130mm, it is well-suited for medium-deep boreholes in mining, quarrying, geothermal and construction applications. Crafted from high-strength alloy steel and equipped with top-grade tungsten carbide buttons, QL40 bits are built to deliver high penetration rates, straight hole drilling, and long service life-even in medium to hard and abrasive rock formations. Their optimized air flushing and button layouts ensure efficient rock fragmentation and smooth cuttings evacuation.
Specification
| Face | Diameter | Part No. | T.C Buttons(mm) | Angle |
Flushing Holes Dia. (mm) |
Weight (kg) |
||||
| Gauge | Front | |||||||||
| mm | inch | Flat | Convex | Concave | ||||||
| Convex | 115 | 4.53 | GD-QL40-115-B(S)-CV | 7×14 | 2×14 | 4×14 | / | 38° | 2×18 | 9.6 |
| Convex | 115 | 4.53 | GD-QL40-115-B(S)-CV | 7×16 | 2×14 | 4×14 | / | 38° | 2×18 | 9.6 |
| Convex | 115 | 4.53 | GD-QL40-115-B(S)-CV | 8×16 | 2×14 | 4×14 | / | 38° | 2×18 | 9.6 |
| Convex | 125 | 4.92 | GD-QL40-125-B(S)-CV | 8×14 | 3×14 | 4×14 | / | 38° | 2×18 | 10.2 |
| Flat | 127 | 5 | GD-QL40-127-B(S)-FF | 8×14 | 7×13 | / | / | 38° | 2×18 | 10.3 |
| Flat | 130 | 5.12 | GD-QL40-130-B(S)-FF | 8×14 | 7×14 | / | / | 38° | 2×18 | 10.5 |
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