What are the common types of coal drill bits?

Coal drill is divided into dry type and wet type two,specifications : 28mm / 30mm / 32mm / 42mm / 43mm, etc. : drilling speed , drilling range is wide , saving time , labor , simple connection , durable and other advantages.The wind drill , also known as the drill head , has a font , column teeth , cross , horseshoe type. Ø20Ø28, Ø30, Ø32Ø36Ø38 , Ø40mm , Ø42mm , Ø50mm , Ø60mm. Mainly used in mining , coal mining , iron ore , gold , roadway , tunnel , excavation , quarrying and transportation water conservancy , municipal construction.

Anchor bit , there are 27mm , 28mm , 30mm , 32mm four specifications.On the basis of the three small products according to user requirements can be customized 36mm , 40mm , 42mm type bolt drill bit , with a variety of 26mm - 40mm twist drill pipe and bolt drill supporting B19 , B22 hollow hexagonal drill pipe used. Type I is suitable for soft rock and Type II is suitable for hard and hard rock drilling.

Diamond bit (PDC) composite bit , anchor bit and geological bit types : normal , type , natural type , human shape , surface insert , impregnated type , core type , coreless type , expansion / hole type , scraper type : Specifications (mm) Ф 27 Ф 28 Ф 29 Ф 30 Ф 32 Ф 36 Ф 38 Ф 42 Ф 60 Ф Ф Ф Ф 89 75 65 94 Ф Ф Ф Ф 133 113 153 98. The product comes in half pieces and whole pieces.

Diamond bit (PDC) Composite bit , anchor bit and geological bit Type Ordinary type Natural type Human shape Table Insert type Insert type Coring type Coreless expansion / pass type Scraper type : Specifications (mm) Ф 25 Ф Ф 26 and 27 Ф 28 Ф 29 Ф 30 Ф 32 Ф 36 Ф 38 Ф 42 Ф 60 Ф Ф Ф Ф 89 75 65 94 Ф Ф Ф Ф 133 113 153 98. The product comes in half pieces and whole pieces. Quality assurance price reasonable.

Anti-surge drill bit , square combination drill bit , Katou connection , convenient , the product is made of tungsten cobalt alloy and diamond composite sheet. Specifications are: (mm) 32 , 42 , 45 , 70 , 76 , 94 , 110 and so on. 

There are two ways to connect the drill shank , namely four and six sides.