DTH Hammer Bit DHD350-152mm
Shank types: DHD3.5, DHD340A, DHD350R, DHD360, DHD380.
DTH rock drill bits hole diameter: 3', 4', ', 6, 8 (85mm-305mm)
DHD shank DTH drill bit with flat face, 8 dome & 8 semi-ballistic carbide buttons for blasting bore holes, water well drilling.
CODE NO. DHD350R-152
Shank type DHD
Diameter 152mm
Air Holes Number 2
gauge buttons 8 17
Face buttons 8 14
Bit face type Flat
carbide design Dome/semi-ballistic
RS is rock drilling tools manufacturer, we produce a various range of DTH hammer bits with DHD shanks type for a wide range of hole sizes, which have been designed to match all conceivable applications for water well industries, mining and construction
Flat Face
An universal design, especially for hard and abrasive rock formation. Typically, flat face with hemispherical buttons design is the most popular choice. This kind of face shape is suitable for hard to very hard and abrasive rock formations in application with high air pressure. Good penetration rates an resistance to steel wash.
Dome/Hemispherical Buttons
Universal buttons for all rock formation, best suited to hardest and very abrasive rock formation.
Semi-Ballistic/Parabolic Buttons
Excellent penetration rate, but only suited to medium hard and not so very abrasive rock formation.
RS DTH Bit features
1. Deliver maximum energy to drilling bit, fast drilling speed and low air consumption due to inner structure of HD series DTH hammer designed according to newest rock drilling theory.
2.Smooth performance and long service life of DTH bits due to high quality alloy steel materials and advanced processing technology adapted.
3.Low problem rate and easy to maintenance due to simple , reliable and easy assemble and disassemble inner structure of DTH bits.
4.Easy to depart bit from hammer due to multi-head thread connection chuck and cylinder of hammer.
5. Can connect well with DTH bit and dill pipe manufactured by Atlas Copco and Sandvik.
We can also provide related products DTH hammers, ODEX system, symmetrix systems, slide block drilling systems, etc and DTH drilling pipes for various thread API REG, API IF, BECO, etc
Quality warranty:
Our products are made of high quality steel and all spares parts are inspected strictly before shipping. We have quickly responses for your complaint and suggestion.
Package:
Using ply-wooden cases and pallet for package to protect the products and avoid the damagement during transportation. Also we can customize package according to your special requests.
Production time:
Generally need 15-25 days
Transportation:
By air, By Express or By sea according to your requests.
A rotation drill rig, air compressor and the "DTH drill string" are the essential unit for DTH drilling while the "DTH drill string" is always made up of DTH drill rods, DTH hammer and DTH bits. As one of key component, the DTH hammer acts as a role of converting the air pressure to the impact energy, simultaneously transferring impact energy and rotation force to DTH bits.
The optimum range of hole size for blast hole drilling with DTH is 90 mm to 254 mm (3 -10). Smaller blast holes are generally drilled using tophammer, and larger holes generally use rotary machines.
In other applications, like foundation drilling, DTH hammers can be used with single bit in hole sizes up to . 750 mm (30). With multiple hammer units CD (Cluster drills) drill holes up to 70 or 1778 mm.
As a rule of thumb, the smallest hole diameter a DTH hammer can drill is its nominal size. A 4 inch hammer will drill a 4 inch (102 mm) hole. The limiting factor is the outside diameter of the hammer, because, as hole diameter reduces, airflow is restricted. Maximum hole size for production drilling is the nominal hammer size plus 1 inch, so for a 4 inch hammer the maximum hole size is 5 inch (127-130 mm).
Choosing the right hammer is largely determined by hole size and type of rock formation. Ideally, the size of the hammer should match the required hole dimension as closely as possible, leaving just enough space for cuttings to evacuate the hole.
