Product Description
High Penetration Rate TD40 COP44G DTH Hammer Drilling Bits for Mining
Description:
DTH Drill Bits are produced from premium quality nickel-alloy steel for increased durability and
wear characteristics. Specific heat treatment standards and special "stress relief" processes ensure
consistent performance.
DTH hammer bits are designed for maximum performance and hole cleaning ability and high penetration rate.
Our bits are interchangeable with Atlas Copco's COP32 34 44 54 64 84, Ingersoll-Rand 's DHD3.5,DHD3.5HD,
DHD 340A , DHD350R, DHD 360, DHD380 QL40, QL50 , QL60, QL80.NUMA100, NUMA120, MISSION60,ects
The down-the-hole hammer is a percussion hammer drill. As the name implies, the hammer works down the hole at the end of the drill string, where the impact piston strikes the drill bit directly. Compressed air is led to the hammer via the rotation spindle and drill pipes. Exhaust air from the hammer is discharged through holes in the drill bit and used to flush clean the drill hole. Rotation is provided by a rotation unit on the feed beam and transmitted to the hammer via the drill pipes. The drill pipes are threaded so that the drill string can be extended as drilling progresses and the hole becomes deeper. Feed force is also transmitted to the hammer via the rotation unit and drill pipes. One of the main advantages of DTH hammers is that the drilling rate is not affected very much by the length or depth of the drill hole. DTH hammers are very productive and have many applications in the mining, quarrying, civil-engineering and water-well drilling industries.
| Specification of dth hammer button bits: |
Diameter: (mm) |
| 1-2 inch low pressure DTH bits |
64/70/76/80/82/90 |
| 3 inch high Air pressure DHT bits |
85 / 90 / 95 / 100 / 105 |
| 4 inch high Air pressure DHT bits |
105 / 110 / 115 / 120 / 127 |
| 5 inch high Air pressure DHT bits |
133 / 140 / 146 / 152 / 165 |
| 6 inch high Air pressure DHT bits |
152 / 165 / 178 / 190 / 203 |
| 8 inch high Air pressure DHT bits |
195 / 203 / 216 / 254 / 305 |
| 10, 12 inch high Air pressure DTH bits |
254/305/318/330/356/381 |
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