Product Description

Blast Hole Mission Drop Center Face DTH Hammer Bits Rock Drill Bit 

Product Description

KINGDRILLING hammer bits are used with Down-the-hole hammers for drilling holes through a wide range of rocks types. In conjunction with DTH hammers, drill hammer bits are designed with a spline drive for rotating the bit in the ground. Drill bits are available in different sizes and different styles so they can drill a wide range of hole sizes.

Rock drill bits Shank type:M3,M4,M5,M6,M8,M1,M12

DTH hammer bits hole diameter: 3”, 4”, 5”, 6”, 8”(85mm-350mm).

 

Product features: 
DTH Drill Bits are produced from premium quality nickel-alloy steel for increased durability and wear characteristics. Specific heat treatment standards and special “stress relief” processes ensure consistent performance. 

Technical Date 

3 Inch Hight Air Pressure DTH bits

Model

Bit Dia.(mm)

NO. X    Button Dia.

NO.Air    Holes(PCS)

Weight(KG)

Gauge

Front

MDHM3-85

85

6*Φ13

4*Φ12

2

4.5

MDHM3-90

90

6*Φ14

4*Φ12

2

4.7

MDHM3-95

95

6*Φ14

4*Φ13

2

4.9

MDHM3-100

100

6*Φ14

5*Φ12

2

5.0

MDHM3-105

105

6*Φ14

5*Φ13

2

5.5

4 inch high air  pressure DTH bits

MDHM4-105

105

6*Φ14

5*Φ13

2

6.0

MDHM4-110

110

7*Φ14

6*Φ13

2

6.2

MDHM4-115

115

7*Φ14

6*Φ13

2

6.6

MDHM4-120

120

8*Φ14

7*Φ13

2

7.0

MDHM4-127

127

8*Φ14

7*Φ13

2

7.4

5 inch high air pressure DTH bits

MDHM5-135

135

7*Φ18

6*Φ14

2

12.5

MDHM5-140

140

7*Φ18

7*Φ14

2

13.5

MDHM5-146

146

7*Φ18

7*Φ14

2

14.0

MDHM5-152

152

8*Φ18

8*Φ14

2

14.4

MDHM5-165

165

8*Φ18

8*Φ16

2

15.0

6 inch high air pressure DTH bits

MDHM6-152

152

8*Φ18

7*Φ16

2

22.0

MDHM6-165

165

8*Φ18

8*Φ16

2

23.0

MDHM6-171

171

8*Φ18

8*Φ16

2

24.0

MDHM6-190

190

9*Φ18

9*Φ16

3

25.0

MDHM6-203

203

9*Φ18

11*Φ16

3

28.0

8 inch high air pressure DTH bits

MDHM8-305

305

12*Φ18

29*Φ16

4

95.0

MDHM8-203

203

10*Φ18

10*Φ16

2

35.0

MDHM8-216

216

10*Φ18

12*Φ16

2

40.0

MDHM8-241

241

12*Φ18

18*Φ16

2

54.0

MDHM8-254

254

12*Φ18

21*Φ16

3

57.0

MDHM8-305

305

12*Φ18

29*Φ16

4

77.0

10 inch high air pressure DTH bits

MDHM10-254

254

12*Φ18

20*Φ16

3

90.0

MDHM10-305

305

12*Φ18

36*Φ16

4

102.0

MDHM10-311

311

12*Φ18

36*Φ16

4

104.0

MDHM10-318

318

12*Φ18

38*Φ16

4

106.0

MDHM10-330

330

14*Φ18

42*Φ16

4

112.0

12 inch high air pressure DTH bits

MDHM12-305

305

12*Φ18

36*Φ16

4

152.0

MDHM12-311

311

12*Φ18

36*Φ16

4

158.0

MDHM12-330

330

16*Φ18

42*Φ16

4

165.0

MDHM12-356

356

16*Φ19

48*Φ16

4

178.0

MDHM12-381

381

16*Φ19

48*Φ18

4

195.0

MDHM125-305

305

12*Φ18

36*Φ16

4

170.0

MDHM125-311

311

12*Φ18

36*Φ16

4

173.0

MDHM125-330

330

16*Φ18

42*Φ16

4

182.0

MDHM125-356

356

16*Φ19

48*Φ16

4

191.0

MDHM125-381

381

16*Φ19

48*Φ18

4

200.0

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

Our Advantages as below:

1. High quality steels materials. Steel is from CZPT and Tungsten carbide are YK05, or T6 from Element Six in Germany

2. Kingdrilling DTH tools are forged by advanced electron-hydraulic forging hammer.

3.Advanced heat-treatment equipment: multipurpose CZPT heat treatment.

4. Completed moulding (tooling ) departments with many molds available.

5.Professional R&D team,completed quality system.

6.Strict Quality-Check Systems.

 

How to order:

Shank Type + Head Diameter + Face Design + Button Shape

 

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 control quality?

A: We have our own experienced QC team,there will be strict inspection and testing for each order before shipping out.

 

4. Competitive price:

A: KINGDRILLING factory can supply you the lowest price due to direct sale to customers without distributor.

 

5. What is the Application?

Mining, Quarrying, Tunneling, Construction, Geological Exploration, Water-well Drilling, Oilfield & Gas Industries.

 

6. Product feature

Kingdrilling DTH tools are forged by advanced electron-hydraulic forging hammer, and harness process is managed by multipurpose CZPT heat treatment.

 

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

a. Concave:

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

b. Convex: 

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

c. 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:

About our Company 
Kingdrilling Machinery Co. , Ltd is established in 2005 years. Located in HangZhou East Lake High-tech Development Zone, is 1 of the most important manufacturers specialized in researching and producing Casing drilling system, DTH hammer, DTH bit, thread DTH bits, taper DTH bits, coupling sleeve, Anchor, Shank adapter, coal picks and so on.

Relying on the university resources and talent advantages in Optical Valley region, combining with multiple laboratories in universities, we focused on developing the newest products system.

Transport:

Package and Delivery:
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.

More products:

 

Standard Length Splined Shafts

Standard Length Splined Shafts are made from Mild Steel and are perfect for most repair jobs, custom machinery building, and many other applications. All stock splined shafts are 2-3/4 inches in length, and full splines are available in any length, with additional materials and working lengths available upon request and quotation. CZPT Manufacturing Company is proud to offer these standard length shafts.
splineshaft

Disc brake mounting interfaces that are splined

There are 2 common disc brake mounting interfaces, splined and center lock. Disc brakes with splined interfaces are more common. They are usually easier to install. The center lock system requires a tool to remove the locking ring on the disc hub. Six-bolt rotors are easier to install and require only 6 bolts. The center lock system is commonly used with performance road bikes.
Post mount disc brakes require a post mount adapter, while flat mount disc brakes do not. Post mount adapters are more common and are used for carbon mountain bikes, while flat mount interfaces are becoming the norm on road and gravel bikes. All disc brake adapters are adjustable for rotor size, though. Road bikes usually use 160mm rotors while mountain bikes use rotors that are 180mm or 200mm.
splineshaft

Disc brake mounting interfaces that are helical splined

A helical splined disc brake mounting interface is designed with a splined connection between the hub and brake disc. This splined connection allows for a relatively large amount of radial and rotational displacement between the disc and hub. A loosely splined interface can cause a rattling noise due to the movement of the disc in relation to the hub.
The splines on the brake disc and hub are connected via an air gap. The air gap helps reduce heat conduction from the brake disc to the hub. The present invention addresses problems of noise, heat, and retraction of brake discs at the release of the brake. It also addresses issues with skewing and dragging. If you’re unsure whether this type of mounting interface is right for you, consult your mechanic.
Disc brake mounting interfaces that are helix-splined may be used in conjunction with other components of a wheel. They are particularly useful in disc brake mounting interfaces for hub-to-hub assemblies. The spacer elements, which are preferably located circumferentially, provide substantially the same function no matter how the brake disc rotates. Preferably, 3 spacer elements are located around the brake disc. Each of these spacer elements has equal clearance between the splines of the brake disc and the hub.
Spacer elements 6 include a helical spring portion 6.1 and extensions in tangential directions that terminate in hooks 6.4. These hooks abut against the brake disc 1 in both directions. The helical spring portion 5.1 and 6.1 have stiffness enough to absorb radial impacts. The spacer elements are arranged around the circumference of the intermeshing zone.
A helical splined disc mount includes a stabilizing element formed as a helical spring. The helical spring extends to the disc’s splines and teeth. The ends of the extension extend in opposite directions, while brackets at each end engage with the disc’s splines and teeth. This stabilizing element is positioned axially over the disc’s width.
Helical splined disc brake mounting interfaces are popular in bicycles and road bicycles. They’re a reliable, durable way to mount your brakes. Splines are widely used in aerospace, and have a higher fatigue life and reliability. The interfaces between the splined disc brake and BB spindle are made from aluminum and acetate.
As the splined hub mounts the disc in a helical fashion, the spring wire and disc 2 will be positioned in close contact. As the spring wire contacts the disc, it creates friction forces that are evenly distributed throughout the disc. This allows for a wide range of axial motion. Disc brake mounting interfaces that are helical splined have higher strength and stiffness than their counterparts.
Disc brake mounting interfaces that are helically splined can have a wide range of splined surfaces. The splined surfaces are the most common type of disc brake mounting interfaces. They are typically made of stainless steel or aluminum and can be used for a variety of applications. However, a splined disc mount will not support a disc with an oversized brake caliper.

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