Changsha Sollroc Engineering Equipments Co., Ltd
FOCUS IN MANUFACTURING OF HIGH QUALITY DTH AND RC DRILLING TOOLS.
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4'' DTH Hammer without Foot Valve for Water Well Drilling with Bit Shank HD45A
Product description:
A down-the-hole hammer provides a solution to the problem of removing hard rock barriers encountered in a bore. The DTH hammer resembles a small jack hammer. It screws onto the end of a drill string like a section of drill pipe. Like the jack hammers used above ground, it's air-powered with a high cyclic rate; unlike jack hammers above ground, it combines its fast-action hammer with a rotary, drilling action. This combined action rotates its chisel-like tip as it drives into the rock, breaking it into chips and dust. Because the DTH hammer is pneumatically powered, it has an air exhaust, which blows the chips and dust from the bore.
Product Advantages:
1. Better borehole quality and accuracy
2. High performance drilling
3. Safer drilling in sensitive formations
4. cost-efficient and environmentally friendly drilling
DTH Hammer specification:
HD45A hammer
| shank | HD45A |
| Length(less bit) | 1011mm |
| External diameter | 92mm/99mm (optional) |
| Top sub thread | API 2 3/8”REG |
| Weight(less bit) | 39kg |
| Hole range | 110mm-130mm |
| Working pressure | 1.0-2. 5Mpa(145-362.5psi) |
| Impact rate at 1.7Mpa | 30Hz |
| Recommended rotation speed | 22-35rpm |
HD45A bit specification
| For 4" hammer DTH bits shank | Bit Dia. | No. Air Holes | Gauge Buttons | Front Buttons | Weight (Kg) | Part No. | |
| mm | inch | ||||||
| HD45A | 105 | 4 1/8" | 2 | 6×φ14 | 5×φ13 | 9.0 | DHD340-105 |
| 110 | 4 1/4" | 2 | 7×φ13 | 6×φ13 | 9.3 | DHD340-110 | |
| 115 | 4 1/2" | 2 | 7×φ14 | 6×φ13 | 10.0 | DHD340-115 | |
| 120 | 4 3/4" | 2 | 8×φ14 | 6×φ14 | 11.0 | DHD340-120 | |
| 127 | 5 | 2 | 8×φ14 | 7×φ14 | 12.0 | DHD340-127 | |
Face shape Features:
Concave face is suitable for all-round rock formation, especially for medium hard and homogeneous rock formations,excellent control over hole deviation.
Convex face is suitable for medium hard rock formation.Non abrasive rock formations. High peneration rate.
Flat face is suitable for hard and abrasive rock formation.High peneration rates and resistance to steel wash.
Detailed photos:
Application: