Roschen  Global
English

PRODUCTS

Home / Products / DTH Drill Bit / DTH drill bits 5inch

NEWS

Share to:

DTH drill bits 5inch

How to choose the right DTH button bits?
ROSCHEN has a comprehensive range of DTH drill bits to match all conceivable applications. Each bit is made from quality alloy steel, and has been precision machined to produce a perfect body, heat treated to the required hardness, given surface compression for fatigue resistance, and fitted with precision buttons manufactured in-house.

Quantity:
  • ROS55-130
  • ROSCHEN
  • BIT 55-130

Product Description

 DTH button bits 5” 


How to choose the right button bits?

ROSCHEN has a comprehensive range of DTH drill bits to match all conceivable applications. Each bit is made from quality alloy steel, and has been precision machined to produce a perfect body, heat treated to the required hardness, given surface compression for fatigue resistance, and fitted with precision buttons manufactured in-house. These are designed for specific applications for all rock types, hardness's and condition. Bit life and rate of penetration are the most important criteria in selecting the right bit for a particular application. 


Specifications:


Diameter

No X Button diameter, mm

Button angle

Flushing holes

Weight(kg)

Part NO.

mm

inch

Gauge Buttons

Front Buttons

130

5    1/8

8 X 16

8 X 14

38

2

15

ROS55-130

135

5    1/4

8 X 16

8 X 14

38

2

15.2

ROS55-135

138

5    1/2

8 X 16

10 X 14

38

2

15.6

ROS55-138

140

5    1/2

8 X 16

10 X 14

38

2

15.8

ROS55-140

146

5    3/4

8 X 18

8 X 15

38

2

16.1

ROS55-146

150

5    7/8

8 X 18

8 X 15

38

2

16.5

ROS55-150

152

6

8 X 18

8 X 15

38

2

17

ROS55-152

156

6    1/8

8 X 18

8 X 16

38

2

17.5

ROS55-156



5" BIT Data Referenced By DHD350R Flat Face Bit

DTH bits 5inch

Carbide Button Shape Selection

DTH button shape


How to select Bit Face Shape?

NO.1  Concave Face

The all-round application bit face specifically for medium hard and homogeneous rock formations.

Good hole deviation control and good flushing capacity.

 

NO.2 Convex Face

For high penetration rates in soft to medium-hard with low to medium air pressures.  It is the most resistance to steel washand may reduce the load and wear on

the gauge buttonsbut poor hole deviation control.

NO.3 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.

 

NO.4 Flat Face

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 can resistance to steel wash.

 

 

NO. 5 Drop Center

For high penetration rates in soft to medium hard and fissured rock formations.  Low

 to medium air pressures. Maximum hole deviation control.

 

NO.6 Pineapple Face

The Pineapple Bit can be dressed with ballistic buttons for use in soft to medium hard formations where fractured rock can be expected, or can be supplied with spherical buttons for hard and abrasive formations. 


DTH BITS FACE

dth bits technical data


QUICK LINKS

CONTACT US

Add: 65 EAST XINHUAN ROAD, SHANGHAI, CHINA
Tel: +86-21-54994419
Fax: +86-21-54380177
Whatsapp/WeChat: +86-13764195009

SALES TEAM LEADERS

Dr.Robert Roschen  /  Bill / Phiger  /  Rebecca

KEEP IN TOUCH
Copyright © 2019 Roschen Group Limited. All Rights Reserved