Bit Body: The main structure of the entire drill bit, used to withstand impact energy and connect to the drill string. Commonly made of high-strength alloy steel.
Carbide Buttons: Carbide teeth mounted on the drill bit head, key components for direct rock breaking. They crush rock under impact. Shapes include ball teeth, horseshoe teeth, and cylindrical teeth.
Striking Surface: The area in direct contact with the rock, containing multiple carbide teeth. Different structures (planar, concave, convex, etc.) are suitable for different formations.
Fluid Channel: Used to eject compressed air or flushing fluid to cool the drill bit and expel rock cuttings, preventing blockage.
Thread Connection: Used to connect to the DTH hammer or drill pipe, transmitting impact and rotational forces. Common thread types include API Reg, DHD, QL, COP, etc.
Gauge Surface:Located on the outer edge of the drill bit, it ensures the borehole diameter and protects the drill bit’s shape from wear by inlaying carbide.
| Impact Drill Bits | ||||
| Specification | Head Shape | Head Diameter (mm) | Shank Length(mm) | Weight (Kg) |
| DHD340 | Convex Face | 108/115/ 127/130 | 209 | 8 |
| DHD350 | Convex Face | 140/146/ 152/165/178 | 260 | 16-20 |
| DHD360 | Convex Face | 154/165/171/ 178/190/203 | 309 | 22-30 |
| DHD380 | Convex Face | 203/216/229/ 235/254/275/305 | 350 | 48-77 |
The impact drill bit operates on a synergistic combination of high-frequency impact and precision coordination, designed to tackle hard rock and complex strata efficiently. Here’s its core working process:
A DTH hammer or percussion drilling rig generates powerful, high-frequency reciprocating impact force— the driving energy for rock breaking.
This impact force is efficiently transmitted to the percussion drill bit via high-strength drill rods, ensuring minimal energy loss during transfer.
The wear-resistant alloy teeth at the drill bit’s front end repeatedly strike the rock surface, leveraging concentrated pressure to fracture hard/brittle rock or gravel layers.
Simultaneously, high-pressure compressed air or specialized flushing fluid is ejected through internal channels, swiftly carrying drilling debris out of the hole to prevent blockages.
The drill bit rotates slightly while impacting, ensuring a uniform fracture surface, maintaining stable hole diameter, and optimizing drilling smoothness.
This integrated design makes UNIQUEMAC impact drill bits ideal for water well drilling, mining, and foundation engineering, delivering superior efficiency and durability across global geological conditions.
