D80 NC31 Down The Hole Hammer Eccentric DTH Button Bits

Basic Information
Place of Origin: Hebei China
Brand Name: Pangolin
Price: Negotiable
Packaging Details: According to customer needs
Delivery Time: 5-15work days
Payment Terms: T/T
Detail Information
Working Pressure: 0.7-2.4Mpa Curved Sub: 1° And 1.5°
Air Consumption: 20-30m3/Min Bit Diameter: 5 1/2”
Pneumatic DTH Hammer: Ø125mm Drill Pipe Threads: NC23 NC26(2 3/8IF) D50 D80 NC31(2 7/8IF) NC38(3 1/2IF)
High Light:

NC31 Down The Hole Hammer


D80 Down The Hole Hammer


Eccentric Dth Button Bits

Product Description

Eccentric DTH Pilot Reamer Bit For Mining Drilling

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, waste gas is used to cool the hammer head. Drain the cuttings out of the cave. Since the outside diameter of the HDD pilot hammer is smaller than the bit diameter, the pilot hammer can be lowered into the hole as the bit depth increases. Compared with the pneumatic drill outside the impact hole, the impact power loss is small, and it can drill deeper holes.
1. The drill bit has high-speed rock impact, high rock drilling speed and high rock breaking efficiency.
2. The drilling quality is high, the drilling speed is fast, and no grinding is required.
3. The high-efficiency drill bit can be optimized and customized according to the rock structure.

1. 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%.
2. Using advanced CNC machining and advanced alloy tooth assembly technology, the tooth loss rate is less than 1%.

Product parameters

Bit Diameter5 1/2”
Pneumatic DTH hammerØ125mm
Curved sub1° and 1.5°
Drill pipe threadsNC23 NC26(2 3/8IF) D50 D80 NC31(2 7/8IF) NC38(3 1/2IF)
Air consumption20-30m3/Min
Working pressure0.7-2.4Mpa
Hardness (HRA)≥92
Wind pressure0.5-0.7Mpa
Drilling depth500 m
Drilling angle38 (°)
Dimensions80-220 (mm)
Weight0.06 (t)

Field of use
The method is suitable for drilling hard rock strata, which is not easy to deviate, and it is more advantageous to be used in the area of water shortage. It is an advanced technology for the drilling of hard rock and pebble layer. Compared with conventional rotary drilling and mechanical percussion drilling, the drilling efficiency can be increased several to ten times. Its application field expands ceaselessly. 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
D80 NC31 Down The Hole Hammer Eccentric DTH Button Bits 0

Drill bit hole opener HDD drilling reamer positioning drilling tool 1


Pangolin (China) Construction Machinery Co., Ltd. is a drill manufacturer with complete testing equipment and strong technical force. Our products have a wide range, high quality, reasonable price, and timely delivery, which are widely used in oilfields, drilling, non-excavation fields and other industries. Our products are widely recognized and trusted by users, and can meet the ever-changing economic and social needs. To
We welcome new and old customers from all walks of life to contact us for future business relations and mutual success!


Drill bit hole opener HDD drilling reamer positioning drilling tool 2



Contact Details
Sophie Zhang

Phone Number : +86-13231687581

WhatsApp : +8613231687581