254mm Cop84 HD85 DHD380r High Air Pressure Bits for Ground Hole Drilling

• Certification: ISO 9001:2000, SGS
• Standard: GB
• Surface Treatment: Spray-Paint
• Shipping Cost: Estimated freight per unit.: about shipping cost and estimated delivery time.
• Currency: US$
• Return&refunds: You can apply for a refund up to 30 days after receipt of the products.
• Model NO.: MDCOP84-254
• Manufacturing Process: Forging
• Material: Carbon Steel
• Model: Mdcop84-254
• Bit Dia.: 254mm
• Bit Shank: HD85(DHD380r, Cop84)
• Weight: 71kg
• Transport Package: Wooden Case
• Trademark: MING
• Origin: China
• HS Code: 8207199000
• Production Capacity: 20000PCS/Year
• Package Size: 41.00cm * 27.00cm * 27.00cm
• Package Gross Weight: 74.000kg

Product Description

254mm COP84 HD85 DHD380R High Air Pressure Bits for Ground Hole Drilling

Product Description

Down the hole(DTH) tools manufacturer KINGDRILLING supply DTH Drill Bits are available in a wide range of sizes and with a number of custom design features for optimum performance in a rock formation, which are designed to match all conceivable applications for water well industries, mining and construction.

Function of Down The Hole Drill Bits

Down The Hole drill bits play a crucial role in the drilling process by effectively breaking and removing rock material to create boreholes of varying depths and diameters. The function of DTH drill bits can be summarized as follows:

1. Rock Breaking: The primary function of a DTH drill bit is to break and fracture rock formations encountered during drilling. The high-velocity impact energy generated by the Down The Hole hammer is transferred to the drill bit, causing the tungsten carbide inserts to exert pressure on the rock surface, leading to its fragmentation.

2. Cutting and Clearance: As the DTH drill bit rotates and advances into the rock, the tungsten carbide inserts on the bit face cut into the material, creating rock chips and cuttings. Simultaneously, the flushing action of water or air through the nozzles helps clear these cuttings from the borehole, preventing bit clogging and maintaining drilling efficiency.

3. Hole Formation: Through a combination of impact force, rotation, and flushing, DTH drill bits facilitate the creation of precise and well-defined boreholes in various rock formations. The design features of the bit ensure optimal contact with the rock surface, allowing for controlled drilling and hole formation.

 

Technical Date

 

1-2 inch Middle air pressure DTH bits
Model	Bit Dia. (mm)	NO. X Button Dia.		NO.Air Holes (PCS)	Weight (KG)
		Gauge	Front
MDHD25-76	76	6*Φ13	5*Φ10	2	3.6
MDHD25-82	82	6*Φ14	4*Φ11	2	4.0
MDHD25-90	90	8*Φ12	5*Φ12	2	4.2
3 inch hight air pressure DTH bits
MDDHD32-85	85	6*Φ13	4*Φ12	2	4.2
MDDHD32-90	90	6*Φ14	4*Φ12	2	4.5
MDDHD32-95	95	6*Φ14	4*Φ13	2	4.7
MDDHD32-100	100	6*Φ14	5*Φ12	2	5.0
MDDHD32-105	105	6*Φ14	5*Φ13	2	5.3
MDDHD34-85	85	6*Φ13	4*Φ12	2	4.2
MDDHD34-90	90	6*Φ14	4*Φ12	2	4.5
MDDHD34-95	95	6*Φ14	4*Φ13	2	4.8
MDDHD34-100	100	6*Φ14	5*Φ12	2	5.0
MDDHD34-105	105	6*Φ14	5*Φ13	2	5.5
MDDHD44-105	105	6*Φ14	5*Φ13	2	8.5
MDDHD44-110	110	7*Φ14	6*Φ13	2	8.8
MDDHD44-115	115	7*Φ14	6*Φ13	2	9.0
MDDHD44-120	120	8*Φ14	7*Φ13	2	9.8
MDDHD44-127	127	8*Φ14	7*Φ13	2	11.0
5 inch high air pressure DTH bits
MDDHD54-135	135	7*Φ18	6*Φ14	2	15.0
MDDHD54-140	140	7*Φ18	7*Φ14	2	16.0
MDDHD54-146	146	7*Φ18	7*Φ14	02	17.0
MDDHD54-152	152	8*Φ18	8*Φ14	2	17.5
MDDHD54-165	165	8*Φ18	8*Φ16	2	18.5
6 inch high air pressure DTH bits
MDDHD64-152	152	8*Φ18	7*Φ16	2	22.0
MDDHD64-165	165	8*Φ18	8*Φ16	2	26.0
MDDHD64-171	171	8*Φ18	8*Φ16	2	27.0
MDDHD64-190	190	9*Φ18	9*Φ16	3	28.5
MDDHD64-203	203	9*Φ18	11*Φ16	3	29.5
8 inch high air pressure DTH bits
MDDHD84-203	203	10*Φ18	10*Φ16	2	40.0
MDDHD84-216	216	10*Φ18	12*Φ16	2	49.0
MDDHD84-241	241	12*Φ18	18*Φ16	2	64.0
MDDHD84-254	254	12*Φ18	21*Φ16	3	71.0
MDDHD84-305	305	12*Φ18	29*Φ16	4	95.0
10 inch high air pressure DTH bits
MDDHD10-254	254	12*Φ18	20*Φ16	3	108.0
MDDHD10-305	305	12*Φ18	36*Φ16	4	125.0
MDDHD10-311	311	12*Φ18	36*Φ16	4	130.0
MDDHD10-318	318	12*Φ18	38*Φ16	4	142.0
MDDHD10-330	330	16*Φ18	42*Φ16	4	155.0
12 inch high air pressure DTH bits
MDHD1120-305	305	12*Φ18	36*Φ16	4	152.0
MDHD1120-311	311	12*Φ18	36*Φ16	4	157.0
MDHD1120-330	330	16*Φ18	42*Φ16	4	165.0
MDHD1120-356	356	16*Φ19	48*Φ16	4	178.0
MDHD1120-381	381	16*Φ19	48*Φ18	4	198.0
Big size bits using in Waterwells, Oil, Gas and Construction Drilling.
MDHD275-311	311	15*Φ18	36*Φ16	3	205.0
MDHD275-334	334	18*Φ19	44*Φ18	3	216.0
MDHD275-356	356	18*Φ19	48*Φ18	3	225.0
MDHD275-368	368	20*Φ19	50*Φ18	4	230.0
MDHD275-381	381	20*Φ19	54*Φ19	4	236.0
MDHD330-381	381	20*Φ19	54*Φ18	4	297.0
MDHD330-406	406	20*Φ19	58*Φ18	4	311.0
MDHD330-431	431	20*Φ19	64*Φ18	4	324.0
MDHD330-445	445	24*Φ20	72*Φ18	4	334.0
MDHD330-470	470	24*Φ20	80*Φ18	4	347.0
MDHD475-495	495	24*Φ20	88*Φ18	4	710.0
MDHD475-525	525	24*Φ20	100*Φ18	4	760.0
MDHD475-580	580	24*Φ20	116*Φ18	4	855.0
MDHD475-660	660	28*Φ20	140*Φ19	4	950.0
MDHD475-680	680	28*Φ20	144*Φ19	4	968.0
MDHD525-711	711	28*Φ20	154*Φ19	4	1455.0
MDHD525-762	762	32*Φ20	172*Φ19	4	1539.0
MDHD525-780	780	32*Φ20	180*Φ19	4	1564.0
MDHD525-825	825	36*Φ20	216*Φ19	4	1625.0
MDHD525-998	998	40*Φ20	348*Φ19	4	1980.0

Kindly Note: We can also design and manufacture the different diameter, holes number, carbide button shape and face shape according to the customers' requirement.

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.
2. Convex: 
Suitable for the formation of moderate hardness stratum, drilling efficiency is good, borehole perpendicularity is moderate.
3. 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

Geothermal well drilling, Water well drilling, Coal mining drilling, Construction, Quarry, Rock Drilling, Exploration drilling, Oil well 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. High quality: We are the partners with a lot of big factories in China. We can provide the best quality products to you. 
2. Competitive price: Competitive price because of direct factory price. 
3. Fast delivery time: It usually takes 20 days for production.only 3 or 5 days if we have stock of your request size.
4. Best quality control: We have our own experienced QC team,there will be strict inspection and testing for each order before shipping out.
5. Problems solve ability: This ability comes from rich experiences of drill bits industry and reliable sales..
6. OEM,ODM service: Your own request about product will be served well.
7. Best after service: We will go to your place to check and solve the problems if you need.

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.

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. Methods of Payment:
T/T (Telegraphic Transfer) or Western Union or L/C at sight

2. Handling time for an order
Based on order quantity, normally it takes 25 days for production.
Only 3 or 5 days if we have stock on your request size.

3. Shipping way
Sample order: We suggest Courier express like DHL/UPS/TNT/FEDEX or by air
Bulk order: We suggest by air or by sea.

4. Quality Control
We have our own experienced QC.
There will be strict inspection and testing for each order before shipping out.

5. After Services:
1. Our sales team will response for your question within 24 hours (Holidays Excluded)
2. Technical Support will be available in any time


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