China High Quality QL50 140mm DTH Drill Bits Water Well Drilling
Bits
Down The Hole Bits
Advantages of new diamond dive drilling:
The longer life of the drill: the alloy material, with longer using
life which better than the similar products
High Drilling Efficiency: the drill buttons is wear-resistant, so
that the drill can always keep sharp, thus greatly improving the
speed of the drilling
The drilling speed is stable: the bit is scraped and cut to break
the rock.
Good Performance: the New Diamond bit has strong wear resistance,
good diameter protection and can make
the cutting teeth be used efficiently.
The use of a wide range: the practice proves that the bit is
suitable for carbonate rock, limestone, chalk,
clay rock, siltstone, sandstone and other soft and hard (9- grade
drillability of rock, hard rock drilling), compared with normal
bit, especially drilling in 6-8 grade rock the effect is
particularly significant.
Different face style makes DTH bits suitable for various rock
conditions.
Flat face: This is an universal design, especially for hard and
abrasive rock formation. So typically, flat face with
hemi-spherical buttons design is the most popular choice.
Convex face: A classic design for soft to medium hard rock
formation which is not so abrasive. This design have very excellent
penetration rate but poor in hole deviation if rocks are hard.
Concave face: Medium hard to hard rock formations which is less
abrasive and fractured. Especially for deep hole drilling,
excellent control over hole deviation.
QL50 High Air Pressure DTH Bit Specification:
| QL50 Spherical button/Concave face |
| 130 | 5 1/8 | 4×14,3×14 | 8×16 | 2 | 14 | 4148301331 |
| 133 | 5 1/4 | 4×14,3×14 | 8×16 | 2 | 14 | 4148301332 |
| 140 | 5 1/2 | 4×14,4×14 | 8×16 | 2 | 15 | 4148301333 |
| 146 | 5 3/4 | 4×14,4×14 | 8×16 | 2 | 15.8 | 4148301334 |
| 152 | 6 | 4×16,4×16 | 8×18 | 2 | 18 | 4148301335 |
| QL50 Ballistic button/Convex face |
| 130 | 4 3/8 | 3×14,4×14 | 9×16 | 3 | 14 | 4148301336 |
| 133 | 4 1/2 | 3×14,4×14 | 9×16 | 3 | 14 | 4148301337 |
| 140 | 4 3/4 | 3×16,4×16 | 9×16 | 3 | 15 | 4148301338 |
| 146 | 5 | 3×16,4×16 | 9×16 | 3 | 15.8 | 4148301339 |
| 152 | 5 1/8 | 3×16,5×16 | 9×18 | 3 | 18 | 4148301340 |
| QL50 Spherical button/Flat face |
| 130 | 4 3/8 | 7×14 | 8×16 | 2 | 14 | 4148301341 |
| 133 | 4 1/2 | 7×14 | 8×16 | 2 | 14 | 4148301342 |
| 140 | 4 3/4 | 7×14 | 7×18 | 2 | 15 | 4148301343 |
| 140 | 5 | 8×14 | 9×16 | 3 | 15 | 4148301344 |
| 146 | 5 1/8 | 8×14 | 9×16 | 3 | 15.8 | 4148301345 |
| 152 | 5 1/4 | 8×16 | 9×18 | 3 | 18 | 4148301346 |
