311mm 12 Inch High Air Pressure DTH Drill Bit for Well Drilling

• Certification: ISO 9001:2000, SGS
• Standard: GB
• Surface Treatment: Spray-Paint
• Manufacturing Process: Forging
• Material: Carbon Steel
• Model: Mdhd1120-311
• Model NO.: MDHD1120-311
• Bit Dia: 311mm
• No. Air Holes: 4PCS
• Weight: 157kg
• Transport Package: Wooden Case
• Trademark: MING
• Origin: China
• HS Code: 8207199000
• Production Capacity: 20000PCS/Year

Product Description

311mm 12 Inch High Air Pressure DTH Drill Bit for Well Drilling

Product Description

DTH bit is our company main product. After many years search, we have rich experience in development and manufacture which adopted high-quality raw materials, advanced craft technology and passed through strictly inspection, manufacturing high quality products.

Shank types: DHD340,DHD350, DHD360, DHD380.

DTH hammer bits hole diameter: 3'', 4'', 5'', 6'', 8'',10",12"(85mm-305mm).

DTH Drill Bit - your ultimate solution for high-performance drilling operations. With its exceptional drilling efficiency, fast drilling and retrieval capabilities, long service life, and superior performance, this state-of-the-art tool is designed to meet the most demanding drilling needs in various industries.

 

Technical date

 

3 Inch High Air Pressure DTH bits
Model	Bit Dia.(mm)	NO. X Button Dia.		NO.Air    Holes(PCS)	Weight(KG)
		Gauge	Front
MDDHD3.5-85	85	6*Φ13	4*Φ12	2	4.5
MDDHD3.5-90	90	6*Φ14	4*Φ12	2	4.7
MDDHD3.5-95	95	6*Φ14	4*Φ13	2	4.9
MDDHD3.5-100	100	6*Φ14	5*Φ12	2	5.0
MDDHD3.5-105	105	6*Φ14	5*Φ13	2	5.5
4 inch high air pressure  DTH bits
MDDHD340-105	105	6*Φ14	5*Φ13	2	9.0
MDDHD340-110	110	7*Φ14	6*Φ13	2	9.5
MDDHD340-115	115	7*Φ14	6*Φ13	2	9.8
MDDHD340-120	120	8*Φ14	7*Φ13	2	11.5
MDDHD340-127	127	8*Φ14	7*Φ13	2	12.3
5 inch high air  pressure DTH bits
MDDHD350-135	135	7*Φ16	6*Φ14	2	15.5
MDDHD350-140	140	7*Φ18	7*Φ14	2	16.0
MDDHD350-146	146	8*Φ18	7*Φ14	2	16.5
MDDHD350-152	152	8*Φ18	8*Φ14	2	17.0
MDDHD350-165	165	8*Φ18	8*Φ16	2	18.0
6 inch high air  pressure DTH bits
MDDHD360-152	152	8*Φ18	7*Φ16	2	26.0
MDDHD360-165	165	8*Φ18	8*Φ16	2	27.0
MDDHD360-171	171	8*Φ18	8*Φ16	2	29.0
MDDHD360-190	190	9*Φ18	9*Φ16	3	32.0
MDDHD360-203	203	9*Φ18	11*Φ16	3	34.0
8 inch high air  pressure DTH bits
MDDHD380-203	203	10*Φ18	10*Φ16	2	37.0
MDDHD380-216	216	10*Φ18	12*Φ16	2	48.0
MDDHD380-241	241	12*Φ18	18*Φ16	2	63.0
MDDHD380-254	254	12*Φ18	21*Φ16	3	70.0
MDDHD380-305	305	12*Φ18	29*Φ16	4	94.0

 How to choose the suitable head face of the DTH drill bit?

1.  Concave:

Suitable for all kinds of formation, especially for deep well drilling, perpendicularity of the hole is wonderful.

1.  Convex: 

Suitable for the formation of moderate hardness stratum, drilling efficiency is good, borehole perpendicularity is moderate.

1.  Flat:        

Suitable for special hard formation stratum, especially for fracture, crack spacing and complex formation drilling effect is very good, has the good perpendicularity of the borehole.

Product Application

High air pressure DTH bits are used for blasting drilling and work with down-hole hammers, mainly for construction projects such as mining, marble quarries or drilling.

Company Profile

Wuhan Kingdrilling Diamond CO., LTD, one of the most professional private manufacturer specialized in researching and producing Overburden casing drilling system, DTH hammer, DTH drill bits, Core bits, Thread bits, Taper bits, Shank adapter, Drilling rods, Coal mining picks and related rock drilling tools.

Relying on the university resources and talent advantages in High-tech region, combining with multiple laboratories in universities, we have more power focused on developing the newest products system.

Our DTH drilling tools are produced with advanced technology from Britain. The company is equipped with advanced production facilities including electron-hydraulic forging hammer, multipurpose furnace heat treatment production line, high performance CNC machines, from raw materials prepared, forging, heat treatment, mechanical processing, a completed manufacturing system is finished in the factory. Strict quality control standards make sure stable quality. 

Whatever in construction, engineering, piling, water well drilling, tunneling, mining, quarrying or horizontal drilling industry, KINGDRILLING will do the best to satisfy your demands. "Kingdrilling, Keep On Striving", we'll always be in this line to serve our customers the most reliable products and the best support.

 

Our Advantages

1.Good resistance to steel wash step gauge bit
2.Reduce the load and wear on the gauge button
3.Can deal with all kinds of different stratum drilling work
4.Can design different diameter,holes number,carbide button shape to the customers' requirements.

After Sales Service

1.Pre-sale service:

Act as a good adviser and assistant of clients enable them to get rich and generous returns on their investments .
1.Select equipment model;
2.Design and manufacture products according to client's special requirement ;
3.Train technical personnel for clients .

2.Services during the sale:

1.Pre-check and accept products ahead of delivery .
2. Help clients to draft solving plans .

3.After-sale services:

Provide considerate services to minimize clients' worries.
1.Complete After-sales service,professional engineers available to service machinery at home or oversea.
2. 24 hours technical support by e-mail.
3.Other essential technological service.

Packaging & Shipping

Packed by Carton or Wooden cases.
Delivery:

1. Goods in stock can be delivered within 5 days.
2. DTH Bits production time is about 15 days.
3. DTH Hammer product time is about 30 days.

Transprotation: By air, By Express or By sea / By train , according to your requests.

FAQ

1. How to order the products?

A: Please send the inquiry with detail item description or with Model number.

 

2. Can I expect a quality products?

A: Yes. mature production technology ensuring the quality satisfy international request.

 

3. 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 ourwebsite for a better understanding.

 

4. How to make sure the quality?

A: More than 40 Years engineer to make sure the quality, 100% inspection.

 

5. What is the general delivery time?

A: 15 working days for DTH bits.

20-25 working days for DTH hammer

3-5 working days for ex stock items.

 

6. Methods of Payment

A: T/T (Telegraphic Transfer) or Western Union.

More products: