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Diamond Core Drill Bit For Core Drilling

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US$ 100 - 200 MOQ: 1 Set
Key Specifications
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Place of Origin:
Shandong, China
Brand Name:
China Coal
Model Number:
77.8mm
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Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
Payment & Shipping
Payment Methods:
Port of Shipment:
Qingdao Shanghai Ningbo Shenzhen
Delivery Detail:
Delivery time depends on order quantity.

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Place of Origin Shandong, China
Brand Name China Coal
Model Number 77.8mm
Type Core Drill Bit
Material Diamond
Use Other, rock drill
Product Description

Diamond Core Drill Bit For core drilling Introduction

1.1 Heat treatment control:

Heat treatment will greatly improve the material strength and increase the thread wear life

of the rods and casings. We conduct either tru-wall or both ends heat treatment to the

tube body. After heat treatment, strength, hardness, straightness and concentricity of the

treated tubes will be tested in our lab.

1.2 Thread opening process:    

Accuracy of threads will determine the use effects and life time of drill rod and casings.   

CNC latches and form cutter are used in thread opening processing to minimize error 

made by anthropic factors. 

1.3 Additional thread treatment: 

Surface of the threads will be cleaned to remove burr adhered after threads are opened. 

Afterwards, the tread surface will be phosphated to improve surface conditions.  

Diamond Core Drill Bit For core drilling Main Parameter

Std

OD(mm)

ID(mm)

Thickness

(mm)

Thread pitch

(mm)

Pin thread

 length

Weight

(kg/m)

Depth capacity

(m)

AQ

44.50

34.90

4.80

6.35

41.50

4.8

500

BQ

55.60

46.10

4.75

8.47

44.45

6.0

1000

NQ

69.90

60.30

4.80

8.47

44.45

7.8

1000

HQ

88.90

77.8

5.55

8.47

44.45

11.50

1000

PQ

114.30

102.1

6.10

10.16

63.50

16.30

1000

BTW

56.7

48.7

4

5.5

39.7

5.2

600

NTW

73.2

64.1

4.55

6.35

44.45

8

600

HTW

91

81

5

8.47

44.45

10.7

300

Diamond Core Drill Bit For core drilling Figure Photos

Company Information

Diamond Core Drill Bit For core drilling 

Certifications

Diamond Core Drill Bit For core drilling 

Canton Fair

Diamond Core Drill Bit For core drilling 

Why Us

 

   Diamond Core Drill Bit For core drillingDiamond Core Drill Bit For core drilling

Diamond Core Drill Bit For core drilling 

Succesful Cases

Diamond Core Drill Bit For core drilling 

Packaging & Shipping

Diamond Core Drill Bit For core drilling 

Payment Termes

Diamond Core Drill Bit For core drilling 

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Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
Business Type
Manufacturer, Trading Company
Year Established
2001
Factory Size
1,000-3,000 square meters
Total Employees
Above 1000 People
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