JD Series High Air Pressure DTH Drill Bits

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.

Rock Abrasiveness

Technical Data