125mm High Strength Hard Rock HDD Pilot Hammer System
Features
1. The drill bit has high-speed rock impact force, high rock
drilling speed and high rock breaking efficiency.
2. The drilling quality is high and the drilling speed is fast,
without grinding.
3. High-efficiency drill bits can be optimized and customized
according to the rock structure.
Advantages
1. The hard alloy tooth material adopts high wear-resistant
formula, and the tooth breaking rate is less than 2%.
2. The body of trousers is made of high-strength high-quality alloy
steel. After advanced heat treatment, the rate of broken trousers
is less than 1%.
3. Using advanced CNC machining and advanced alloy tooth assembly
technology, the tooth loss rate is less than 1%.
Product parameters
| Bit Diameter | 5 1/2” |
| Pneumatic DTH hammer | Ø125mm |
| Curved sub | 1° and 1.5° |
| Drill pipe threads | NC23 NC26(2 3/8IF) D50 D80 NC31(2 7/8IF) NC38(3 1/2IF) |
| Air consumption | 20-30m3/Min |
| Working pressure | 0.7-2.4Mpa |
| Strength | ≥2800N |
| Hardness (HRA) | ≥92 |
| Wind pressure | 0.5-0.7Mpa |
| Drilling depth | 500 m |
| Drilling angle | 38 (°) |
| Dimensions | 80-220 (mm) |
| Weight | 0.06 (t) |
Introduction
Use HDD Pilot Hammer with drilling rig and corresponding drilling
tools for percussion rotary drilling. The HDD pilot hammer is
connected to the bottom end of the drill pipe. The drill rig drives
the drill rod to rotate. Compressed air enters the HDD pilot hammer
through the drill pipe to generate a certain frequency of impact
force to break the rock. At the same time, the exhaust gas is used
to cool the hammer head. Drain the debris from the hole. Because
the outer diameter of the HDD pilot hammer is smaller than the
drill diameter, it can be lowered into the hole as the drill depth
increases. Compared with the pneumatic drill outside the impact
hole, the impact power loss is small, and it can drill deeper
holes.
Field of use
This method is suitable for drilling into hard rock formations, the
drilling is not easy to deviate, and it is more advantageous to use
in water-deficient areas. It is used to drill into hard rock and
pebble layers, and the drilling efficiency can be increased several
to ten times compared with conventional rotary drilling and
mechanical percussion drilling, and it has been promoted as an
advanced technology. Its application fields have been expanding. In
the past, it was mainly used for drilling blast holes in mines, but
it has been used in hydropower, railways, highways, water wells,
building foundation piles, and geological prospecting.
Pic Show
FAQ:
1. How to order the products?
A: Please send the inquiry with detail item description or with
Model number.
2. How about the common packing?
A: If there is no special packing demand, we will take it as our
normal packing. First in small carton, and then put in the bigger
carton together to make sure goods completed.
3. Can I expect a quality products?
A: Yes. mature production technology ensuring the quality satisfy
international request.
4. How to check the product are the exact one you want?
A: If possible, please attach one reference picture to avoid any
misunderstanding or any links from our website for a better
understanding.
5. How to control quality?
A: We have our own experienced QC team,there will be strict
inspection and testing for each order before shipping out.
6. Fast delivery time:
A: Usually it takes 25 days for production.only 3 or 5 days if we
have stock of your request size.
7. Competitive price:
A: Our factory can supply you the lowest price due to direct sale
to customers without distributor!
