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76mm CIR Sereis Low Air Pressure DTH Rock Drill Bits

FOB Price:	US$25.00 / Piece
Min. Order:	1 Piece

Min. Order	FOB Price
1 Piece	US$25.00/ Piece

Port:	Shanghai, China
Production Capacity:	5000sets Per Year
Payment Terms:	L/C, T/T, D/P, Western Union, Paypal, Money Gram

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76mm CIR Sereis Low Air Pressure DTH Rock Drill Bits

Product Description

Company Info

Basic Info.

Model NO.

76mm drill bit

Type

Bearing

Application

Tunnel Boring Machine

Certification

Condition

New

Color

Yellow, Red, Blue,Orange, Green etc.

Depth of The Hole

10m-1000m

Diameter of The Hole

90mm-350mm

Trademark

CH DRILL

Transport Package

Wooden Case

Specification

CIR90/CIR100/CIR110/CIR130/CIR170/CIR300

Origin

Zhuzhou, Hunan, China

HS Code

8207199000

Product Description

76mm CIR sereis low air pressure DTH rock drill bits

Brief introduction of our DTH hammer:

Bit face shape selection:
1. Drop Center Bit
For high penetration rates in soft to medium hard and fissured rock formations. Low to medium air pressures. Maximum hole deviation control.
2. Concave Face
The all-round application bit face specifically for medium hard and homogenerous rock formations. Good hole deviation control and good flushing capacity.
3. Convex Face
For high penetration rates in soft to medium-hard with low to medium air pressures. It is the most resistance to steel wash, and may reduce the load and wear on the gauge buttons, but poor hole deviation control.
4. Double Gauge Face
This kind of face shape is suitable for fast penetration rates in medium to hard rock formations. Designed for high air pressures and good resistance to steel wash step gauge bit.
5. Flat Face Bit
This kind of face shape is suitable for hard to very hard and abrasive rock formations in applications with high air pressures. Good penetration rates an resistance to steel wash.

DTH bits specifications:

Hammer inch	Bits diameter		Shank
Hammer inch	Metric	Inch	Shank
1"	64mm-70mm	2 1/2"-2 3/4"	BR1
2"	70mm-95mm	2 3/4"-3 3/4"	MACH20/BR2
3"	90mm-102mm	3 1/2"-4"	COP32/COP34/MACH303 M30/DHD3.5/BR3
4"	105mm-152mm	4 1/8"-6"	COP44/DHD340/MACH44 SD4/M40/QL40
5"	133mm-165mm	5 1/4"-6 1/2"	COP54/DHD350R/MACH50 SD5/M50/QL50/BR5
6"	152mm-254mm	4 1/8"-10"	COP64/DHD360/SD6 M60/QL60/Bulroc BR6
8"	203mm-330mm	8"-13"	COP84/DHD380/SD8 QL80/M80
10"	254mm-380mm	10"-15"	SD10 NUMA100
12"	305mm-508mm	12"-20"	DHD1120/SD12 NUMA120/NUMA125

Picture of low air pressure DTH drill bit:

Picture of low air pressure DTH hammer:

Picture of our factory:

How to Chose the Right Products :
Choosing the right hammer is determined by drill machines (mainly compressor output), drilling 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 compressed air to flush cuttings and clean the hole.

The optimum range of hole size for blast-hole drilling with DTH method is 90~254 mm (3-1/2"~ 10") with 3.5 ~ 8" hammers. Smaller blast holes are generally drilled with top-hammer tools, while larger holes typically with rotary drilling tools. In other applications, like foundation drilling, DTH hammers can be used in hole size up to 1,000 mm (39-3/8").

Usually, the smallest hole diameter a DTH hammer can drill is its nominal size, for example, a 4"hammer would drill a 4" (100/102 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"for 5" and smaller hammers and plus 2 for 6" and bigger hammers, for example, for a 4" hammer the maximum hole size is 5" (127/130mm) while for a 8"hammer the maximum hole size is 10" (254mm).

Advantages:

1. Deliver maximum energy to drilling bit, fast drilling speed and low air consumption due to the special inner structure of HD series DTH hammer designed according to newest rock drilling theory.

2. Smooth performance and long service life of HD series DTH hammer 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 hammer.

4. Easy to depart bit from hammer due to multi-head thread connecting chuck and cylinder of hammer.

5. Interchangeable with DTH bit and drill pipe.

FAQ:
1.Are you a manufacturer or a trade company?
We are a manufacturer of rock drilling tools and tungsten carbide products in China over 16 years.

2.Where is your company?
We are located in Chinese largest production base of tungsten carbide, Zhuzhou city, Hunan province. Half an hour by car from Changsha airport, two and a half hours by CHR express from Guangzhou station to Zhuzhou city.

3.Why choose Chdrill?
1)We have more than 30years of researching, developing, manufacturing and exporting high quality rock drilling tools and tungsten carbide products to the global market.
2)High quality.
3)Competitive price.
4)Excellent customer service.

4.Which port do you shipping from?
We usually ship container from Shanghai port and Shenzhen, Guangzhou port are available too.

5.What is your minimum order quantity?
Our MOQ are 1pc or 1 set, the price may rely on the order quantity.

6.What is your payment term?
We accept T/T, L/C at sight, West union and PayPal.

7. How about the delivery time?
For general products, we have in stocks.
For others, it depends on the quantity, generally it takes about 15-25workdays.

8. Can I visit your factory?
Warmly welcome to our factory. We will pick you up at Changsha air port or Zhuzhou West Station or Zhuzhou station.

For more low and high air pressure DTH drill bit, please contact our customer service:

Address: No. 78, New Street Longtoupu, Shifeng District, Zhuzhou City, Hunan Province

Business Type: Manufacturer/Factory

Business Range: Computer Products, Industrial Equipment & Components, Manufacturing & Processing Machinery, Packaging & Printing, Tools & Hardware

Management System Certification: ISO 9001, ISO 14001, ISO 20000, OHSAS/ OHSMS 18001

Main Products: DTH Drill Bit, Rock Drilling Tools, Thread Drill Bit, Tungsten Carbide Buttons, Tungsten Carbide Mining Cutters, Drilling System, Tapered Drill Bits and Drill Rod, Tungsten Carbide Products, DTH Hammer, Double Casing Drilling System

Company Introduction: Zhuzhou Changhong Mining Machinery Co., Ltd. is located in Zhuzhou Hunan, which has rich and valuable experience in manufacturing mining & engineering products. The company is informed with the product, technology and latest development in mining & engineering industry. Our business philosophy is to "Develop on Quality and Win reputation on Integrity". To create a new brand "Changhong Drill" and meet overseas and domestic market in mining & engineering industry. <o: P>

Changhong Drill manufactures high, medium and low air-pressure DTH hammers and drill bits, concentric and eccentric drilling system, tunnel TBM cutter, various threaded drill bits and shank adapter, coupling sleeve, drill pipe and rock drilling accessories. All of our products are compatible with world famous brand products such as Atlas, Ingersoll Rand, Sandvik. They are widely used in construction sites of mining drilling, ground excavating, tunnel drivage, transportation, irrigation works and hydropower, water well, foundation treatment, exploration, applicable for rock drilling and cutting tools under various geological conditions. <o: P>

We have our own R&D team and more than 30 years experience in drilling industry. High quality raw material and advanced productive technology, rigorous testing method to make sure of high performance and quality products. Further more, we provide with reasonable price and integrity service. Welcome to Zhuzhou Changhong Mining Machinery Company. <o: P>

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76mm CIR Sereis Low Air Pressure DTH Rock Drill Bits

Product Description

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Basic Info.

Product Description

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