| QL Series |
Nominal Dia. (mm) |
Side Teeth
QTY*Dia. |
Middle Teeth
QTY*Dia. |
Connection with
DTH Hammer |
Weight (kg) |
Specification |
 |
φ115 |
7×φ16 |
2xφ14+4×φ14 |
QL40 |
9.6 |
KQZG115T |
| φ125 |
8×φ14 |
3xφ13+4×φ14 |
QL40 |
10.2 |
KQZG125T |
| φ127 |
8×φ14 |
7×φ13 |
QL40 |
10.3 |
KQZG127P |
| φ130 |
8×φ14 |
7×φ14 |
QL40 |
10.5 |
KQZG130P |
| φ140 |
7×φ18 |
3xφ14+4×φ15 |
QL50 |
15.1 |
KQZG140T |
| φ140 |
8×φ16 |
8×φ14 |
QL50 |
15.3 |
KQZG140P |
| φ146 |
8×φ18 |
8×φ15 |
QL50 |
15.9 |
KQZG146P |
| φ146 |
8×φ18 |
4xφ15+3×φ14 |
QL50 |
15.8 |
KQZG146A |
| φ152 |
8×φ18 |
8×φ15 |
QL50 |
16.4 |
KQZG152P |
| φ152 |
8×φ18 |
4xφ16+4×φ14 |
QL50 |
16.2 |
KQZG152A |
| φ165 |
8×φ18 |
8×φ16 |
QL60 |
23.8 |
KQZG165P |
| φ165 |
8×φ18 |
4xφ16+4×φ16 |
QL60 |
23.6 |
KQZG165T |
| φ165 |
8×φ18 |
4xφ16+4×φ15 |
QL60 |
23.3 |
KQZG165A |
| φ171 |
8×φ18 |
6xφ16+4×φ16 |
QL60 |
24 |
KQZG171A |
| φ178 |
8×φ18 |
6xφ16+4×φ16 |
QL60 |
24.6 |
KQZG178A |
| φ190 |
10×φ18 |
8xφ16+5×φ16 |
QL60 |
26.1 |
KQZG190A |
| φ203 |
10×φ18 |
8×φ18+5×φ16 |
QL80 |
50.1 |
KQZG203A |
| φ216 |
10×φ18 |
8×φ18+6×416 |
QL80 |
54.3 |
KQZG216A |
| φ219 |
10×φ18 |
8×φ18+6×φ16 |
QL80 |
54.8 |
KQZG219A |
| φ229 |
12×φ18 |
12×φ16+7×φ16 |
QL80 |
56.4 |
KQZG229A |
| φ235 |
12×φ18 |
12×φ16+7×φ16 |
QL80 |
57.4 |
KQZG235A |
| φ245 |
12×φ19 |
12×φ16+8×φ16 |
QL80 |
61.5 |
KQZG245A |
| Item |
Specification |
| Shank Series |
QL Series |
| Hole Diameter |
115 – 254 mm |
| Button Material |
Premium Tungsten Carbide |
| Bit Body Material |
Heat-treated Alloy Steel |
| Suitable Rock |
Medium to Hard Rock |
| Air Pressure Range |
Medium to High Pressure |
| Application Depth |
Shallow to Deep Hole Drilling |
Custom Options Available
- Custom diameter design
- Different carbide button shapes
- Face design optimization
- OEM / private label production
QL DTH bits are manufactured using strict production standards to ensure consistent quality and performance.
Quality Control Process
- High-grade alloy steel forging
- CNC precision machining
- Controlled heat treatment process
- Carbide button quality inspection
- Dimensional accuracy testing
These processes ensure each bit delivers long service life and stable drilling performance in extreme conditions.
Reliable Supply for Worldwide Projects
We provide stable production capacity and global delivery support for QL DTH drill bits.
Supply Advantages
- Fast production lead time
- OEM & private labeling available
- Bulk order capacity support
- Consistent quality control system
- Global shipping capability
