HOW TO CHOOSE A STYLE
Normal drill bit
Suitable for ordinary rock, hardness 8-14, abrasive rock. The main appearance is flat type, tooth diameter is moderate, alloy impact resistance and wear resistance balance, multi-choice high-ball teeth and semi-ballistic teeth, generally adapted to a variety of rocks, for the general rock and unclear rock type of the case is recommended.
Hard rock drill bit
Mainly used in F14 and above, non-abrasive rocks. The main performance is a large profile, tooth-shaped multi-choice ball teeth and high-ball teeth, alloy wear resistance and impact resistance is better, powder inger effect is slightly lower than ordinary drill bit. Because the amount of alloy is more, the price is higher than that of the normal type.
Soft rock drill bit
Mainly applicable to non-breaking, hardness of 8 or less, non-abrasive rock. The main appearance is concave, tooth diameter is small, alloy impact resistance and wear resistance is better, more selection of semi-ballistic teeth, ballistic teeth, powder ingerifying effect is better than ordinary type, in order to improve work efficiency.
Retrac drill bit
Mainly used in the rock relatively broken, rock layer changes in the construction, the main appearance of concave band tail design, conducive to unexpected situations in the back of the brazing, front-end style can be selected by reference to the above product design.
HOW TO CHOOSE TOOTH PROFILE
Parabolic button
Parabolic Button are usually used as gauge buttonsand front buttons of DTH Bits,suitable for medium abrasive and hard formations.
Ballistic button
The high tooth height, mainly used in soft rock and ordinary rock F12 below, the speed of entry is fast, but the hard rock, very hard rock is prone to the phenomenon of broken teeth.
Hemispherical button
The tooth height is low, mainly used in extremely hard rock F14 or above, improve wear resistance, prevent the appearance of broken teeth, the speed is lower.
BIT FACE SHAPE SELECTION (DTH drill bit)
Drop center bit
For high penetration rates in soft to medium hard and fissured rock formations.Low to medium air pressures. Maximum hole deviation control.
Convex face
For high penetration rates in soft tomedium-hard with low to medium air pressures.It isthe most resistance to steel wash. And may reduce the Load and wear on the gauge buttons，but poor hole Deviation control.
Concave face
The all-round application bit face specifically for medium hard and homogenerous rock formations. Good hole deviation control and good Flushing capacity.
Double gauge face
This kind of face shape issuitable for fast penetration rates in medium to hardrock formations.Designed for high air pressures andGood resistance to steel wash step gauge bit.
Flat face bit
This kind of face shape is suitable for hardto very hard and abrasive rock formations inApplications With high air pressures.Good penetration Rates an resistance to steel wash.
