Specifications

Crown Hole Opener Bits
1.Produce as your requirement
2.Bit diameter, face shape
3.Carbide button shape
4.Number of air hole

Crown Hole Opener Bits and Inner Hole Opener Bit:

1. 10 years manufacturing experience;

2. Certificate: ISO9001:2008

3. Material: Carbide

 

Bit Face Shape Selection:

  

1. Drop Center Bit

For high penetration rates in soft to medium hard and fissured rock formations. Low to medium air prssures. Maximum hole deviation control.

 

2. Concave Face

The all-round application bit face specifically for medium hard and homogenerous rock formations. Good hole deviation control and good flushing capacity.

 

3. Convex Face

For high penetration rates in soft to medium-hard with low to medium air pressures. It is the most resistance to steel wash, and may reduce the load and wear on the gauge buttons, but poor hole deviation controls.

 

4. 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.

 

5. Flat Face Bit

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 an resistance to steel wash.

Carbide Button Shape Selection:

1. Domed/Round Button

Domed/Round Buttons are usually used as gauge buttons of dth bits, suitable for very abrasive and very hard formations.

 

2. Parabolic/Semi-Ballistic Buttons

Parabolic Buttons are usually used as gauge buttons and front buttons of dth bits, suitable for medium abrasive and hard formations.

 

3. Ballistic Button

Ballistic Buttons are usually used as front buttons of dth bits, suitable for medium abrasive and medium hard formations. They can also be used as gauge buttons if the rock is soft.

 

4. Sharp Button

Sharp Buttons are usually used as front button of dth bits for soft formations where fast penetration rates are possible.

 

5. Flat Button

Flat Buttons are usually used as protection buttons to reduce wear on rubbing surfaces of dth bits.

Our advantages:

 

We have advanced production equipments & talented researchers & technicians & rich experiences in R & D and production.
We use the best quality raw materials.
We adopt advanced production technology & strict testing procedure.
We passed ISO9001 quality management system certification.
We accept OEM manufacturing and produce on your design.