Brief introduction
These DTH bits (down the hole button bits) are hot pressed and
undergo a combination of heat treatments, thus guaranteeing the
good quality and longevity. The diameters range from 60mm to 700mm.
The shanks can be Cop series, like COP32, cop34, cop44, cop54,
cop64, COP84. DHD series, like DHD3.5, DHD350, DHD340, DHD360,
DHD380. QL series, like QL40, QL60.QL80. SD series, SD4, SD5, SD6,
SD8, CIR series, like CIR65, CIR70, CIR80, CIR 90, CIR110, CIR110W,
CIR150, CIR170, CIR200W etc.
DTH BITS
For each rock a special design
TYPES OF INSERT
SPHERICAL
Is an insert with a dome in the shape of a half sphere with D/2
radius. RANGE: 7/16" - 3/4" diameter. Recommended for hard and
abrasive ground.
BALLISTIC
Is an insert with a dome in a shape of a bullet. RANGE: 7/16" -
3/4" diameter. Recommended for soft and homogeneous ground where
high drilling speeds are achieved.
The most important component of drilling in limestone is
maintaining a high penetration rate of the drill string; due to
drilling and blasting being the first step in the production
process. Limestone is generally homogeneous, relatively soft, and
has low
abrasion characteristics, making total footage less sought after
when compared to high penetration rates. The characteristics of
limestone present problems to a DTH hammer over time. Excessive
wear on internal components will not necessarily prevent the hammer
from operating, but it will cause the penetration rate to reduce
considerably.
Model and Specifications:
| Specification | | | | | | | |
| DTH Bit | Bit Diameter | Buttons(mm) | Water Hole | Part No. |
| mm | in | Guage | Front | Angle |
Matched:CIR80,CIR90,QCIV-90
DTH Hammer | 80 | 3 3/20" | 6*12 | 4*12 | 40° | 3 | DSL-B11 |
| 90 | 3 35/64" | 6*14 | 4*12 | 40° | 3 | DSL-B12 |
| 90 | 3 35/64" | 6*14 | 4*12 | 40° | 3 | DSL-B13 |
| 90 | 3 35/64" | 6*14 | 4*12 | 40° | 3 | DSL-B14 |
| 95 | 3 45/64" | 6*14 | 4*12 | 40° | 3 | DSL-B15 |
Matched:CIR100,CIR110,J100
DTH Hammer | 105 | 4 9/64" | 6*14 | 6*12 | 40° | 2 | DSL-B16 |
| 110 | 4 21/64" | 6*14 | 6*12 | 40° | 2 | DSL-B17 |
| 115 | 4 17/32" | 6*14 | 7*14 | 40° | 2 | DSL-B18 |
| 125 | 5" | 6*16 | 7*14 | 40° | 2 | DSL-B19 |
Matched:CIR150,CIR170
DTH Hammer | 150 | 6" | 8*16 | 11*14 | 45° | 3 | DSL-B20 |
| 175 | 6 57/64" | 15*16 | 9*14 | 45° | 3 | DSL-B21 |
Matched:DHD340A
DTH Hammer | 105 | 4 9/64" | 7*14 | 6*13 | 40° | 2 | DSL-B22 |
| 105 | 4 9/64" | 8*14 | 7*12 | 40° | 2 | DSL-B23 |
| 115 | 4 31/64" | 8*14 | 6*14 | 40° | 2 | DSL-B24 |
Matched:DHD360
DTH Hammer | 165 | 6 1/2" | 8*16 | 10*16 | 40° | 2 |
