5 1/2 Inch 500m HDD Pilot Hammer For Impact Rotary Drilling
Introduction
Use HDD pilot hammer to cooperate with drilling rig and
corresponding drilling tools for impact rotary drilling. The HDD
guide hammer is connected to the bottom end of the drill rod. The
drill rig drives the drill rod to rotate. Compressed air enters the
HDD pilot hammer through the drill pipe, generating 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. Since the outer diameter of the HDD pilot hammer is
smaller than the drill bit diameter, the pilot hammer can be
lowered into the hole as the depth of the drill bit increases.
Compared with the pneumatic drill that impacts outside the hole,
its impact power loss is small and it can drill deeper holes.
Features
1. The drill bit impacts the rock fast, the rock drilling speed is
fast, and the rock breaking efficiency is high.
2. The drill bit has high wear resistance and can hit more meters.
3. The drilling quality is high and the drilling speed is fast,
without grinding.
4. High-efficiency drill bits can be optimized and customized
according to rock structure.
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) |
Field of use
This method is suitable for drilling into hard rock formations, and
the drilling is not easy to shift, and it is more advantageous to
use in water-deficient areas. Used for drilling hard rock and
pebble layers. Compared with traditional rotary drilling rigs and
mechanical impact drilling rigs, its drilling efficiency can be
increased several to ten times, which is an advanced technology.
Its application areas are expanding. In the past, it was mainly
used for blasting and drilling in mines, but has now been used in
hydropower, railways, highways, water wells, construction pile
foundations, and geological prospecting.
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%.
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!
