JM Series High Pressure DTH Drill Bits

Carbide button shape selection

Domed/Round Button

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

Parabolic /Semi-Ballistic Button

Parabolic/Semi-Ballistic buttons are usually used as gauge buttons and front buttons of DTHbits,suitable for medium abrasive and hard formations

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.

Sharp Button

Sharp buttons are usually used as front buttons of DTH bits for soft formations,suitable for soft rock with high rotation speed and low bit broken rate soft rock.

Bit Face Design

1). Center Drop Face

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

2). Concave Face

The all-round application bit face specifically for medium hard and homogeneous 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 pressure.It is the most resistance to steel wash,and may reduce the load and wear on the gauge buttons,but poor hole deviation control.

4). 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.

Technical Data

Pictures