Thread drill bit for hard rock ,The thread connecting drill bit is a kind of drill bit which is connected with the drill rod by the thread of pants, 

which can realize the impact and rotation transfer of the drill and break the rock. 

The STAROCKDRILL thread bit USES advanced hot insert technology and optimized product design with less than 3% broken teeth and less than 0.1% off. 

Cemented carbide adopts advanced high temperature reduction, high temperature carbonization process and good wear resistance. 

There are several models that match the connection impactor specifications. And can be customized as required.

Thread Button bits are made by alloy steel bar of quality and tungsten carbides.

Through heat treatment, our drilling tools are tough enough to meet rock drilling demands and have the least loss of energy while drilling the rocks.

Besides, we can design customized thread button drill bits according to different drilling application, and custom drill bits are applicable to drill soft rock, 

loose-medium rock and hard rock:

(1)Thread: R22, R25, R28, R32, R35, R38, T38, T45, T51, ST58, T60 

(2)Diameter: 38-127mm.

The combination of good design, excellent manufacturing techniques, exact heat treatments, high quality steels and special grade carbides, 

STAROCKDRILL yield optimum drill bits capable of performing well in all kind of drilling conditions from soft to the toughest.