เกลียวลำเลียง

There are three categories of conical rock augers:
A) Single-cut Single-spiral
B) Double-cut Single-spiral
C) Double-cut Double-spiral

Drilling Diameter Range: 500~2500mm

Main Applications:
I) Single Cut and Double Cut Augers are suitable for drilling in medium to strong rock (15~60 MPa)
Ii) Double Cut are recommended in bigger diameters uncased boreholes.
Iii)Single Spiral provides high drilling speed, easy cleaning and low rotary resistance
Iiii)Double spiral has better guiding property and efficient carrying-soil capability

There are three categories of Flat or Butterfly Rock Auger:
A) Single-cut Single-spiral Auger
B) Double-cut Single-spiral Auger
C) Double-cut Double-spiral Auger

Drilling Diameter Range: 500~2500mm

Main Applications:
I) The Single Cut and Double Cut Augers are suitable for drilling in weak fractured rock and very dense sand and gravel (Less than 5 MPa)
Ii) Double Cut Augers are mainly used for bigger diameter uncased boreholes and secant piles
Iii) Double Cut Auger without rock pilot are recommended for fractured rock or moderately weak to moderately strong rock (5~50 MPa)
Iii)Single Spiral provides high drilling speed, easy cleaning and low rotary resistance
Iiii)Double spiral has better guiding property and efficient carrying-soil capability, but high rotary resistance

Compared with conical auger, flat auger has better guiding property, better carrying-soil capability, but higher rotary resistance