China Zhongtai Holding Co. Ltd

Short augers are mainly divided into the following types:1- Conical Rock Auger2- Flat or Butterfly Rock Auger3- Flat or Butterfly Clay Auger 1) Conical Rock AugerThere are two categories of conical rock augers:a) Single Cut Augerb) Double Cut Auger Drilling Diameter Range: 5002500mm Main Applications: i) Single Cut and Double Cut Augers are suitable for drilling in medium to strong rock (1560 MPa)ii) Double Cut are recommended in bigger diameters uncased boreholes Features:1- Rock Pilot2- Hard facing strips on flights for wear protection3- Kelly box size as per customer demand 2) Flat or Butterfly Rock Auger:There are three categories of Flat or Butterfly Rock Auger:a) Single Cut Augerb) Double Cut Augerc) Double Cut Auger without Rock Pilot Drilling Diameter Range: 5002500mm 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 pilesiii) Double Cut Auger without rock pilot are recommended for fractured rock or moderately weak to moderately strong rock (550 MPa) Features:1- Rock Pilot2- Hard facing strips on flights for wear protection3- Kelly box size as per customer demand 3) Flat or Butterfly Clay AugerThere are two categories of Flat or Butterfly Rock Auger:a) Single Cut Augerb) Double Cut Auger Drilling Diameter Range: 5002500mm Main Applications:i) The Single Cut and Double Cut Augers are suitable for drilling in clay, silt and loose to medium dense sand and gravelii) The Single Cut and Double Cut Augers with side cutters are suitable for drilling in hard clay, silt and medium to high dense sand and graveliii) Single Cut Augers are recommended up to coarse gravel Features:1- Fish-tail Pilot2- Hard facing strips on flights for wear protection3- Kelly box size as per customer demand

Short augers are mainly divided into the following types:1- Conical Rock Auger2- Flat or Butterfly Rock Auger3- Flat or Butterfly Clay Auger 1) Conical Rock AugerThere are two categories of conical rock augers:a) Single Cut Augerb) Double Cut Auger Drilling Diameter Range: 5002500mm Main Applications: i) Single Cut and Double Cut Augers are suitable for drilling in medium to strong rock (1560 MPa)ii) Double Cut are recommended in bigger diameters uncased boreholes Features:1- Rock Pilot2- Hard facing strips on flights for wear protection3- Kelly box size as per customer demand 2) Flat or Butterfly Rock Auger:There are three categories of Flat or Butterfly Rock Auger:a) Single Cut Augerb) Double Cut Augerc) Double Cut Auger without Rock Pilot Drilling Diameter Range: 5002500mm 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 pilesiii) Double Cut Auger without rock pilot are recommended for fractured rock or moderately weak to moderately strong rock (550 MPa) Features:1- Rock Pilot2- Hard facing strips on flights for wear protection3- Kelly box size as per customer demand 3) Flat or Butterfly Clay AugerThere are two categories of Flat or Butterfly Rock Auger:a) Single Cut Augerb) Double Cut Auger Drilling Diameter Range: 5002500mm Main Applications:i) The Single Cut and Double Cut Augers are suitable for drilling in clay, silt and loose to medium dense sand and gravelii) The Single Cut and Double Cut Augers with side cutters are suitable for drilling in hard clay, silt and medium to high dense sand and graveliii) Single Cut Augers are recommended up to coarse gravel Features:1- Fish-tail Pilot2- Hard facing strips on flights for wear protection3- Kelly box size as per customer demand

Continuous Flight Augers or CFA is also manufactured by Unimate for different drilling conditions i.e., soft soil or hard rock. CFA is equipped with different types of hexagonal coupling depending on the type of soil being drilled, drilling method being used and also the drilling diameter. Besides the production of single wall and double wall casings for any diameter, Unimate also manufactures other accessories used when drilling with casing e.g., Casing drive adapter, casing joints and casing shoes/blocks, etc.

Short augers are mainly divided into the following types:1- Conical Rock Auger2- Flat or Butterfly Rock Auger3- Flat or Butterfly Clay Auger 1) Conical Rock AugerThere are two categories of conical rock augers:a) Single Cut Augerb) Double Cut Auger Drilling Diameter Range: 5002500mm Main Applications: i) Single Cut and Double Cut Augers are suitable for drilling in medium to strong rock (1560 MPa)ii) Double Cut are recommended in bigger diameters uncased boreholes Features:1- Rock Pilot2- Hard facing strips on flights for wear protection3- Kelly box size as per customer demand 2) Flat or Butterfly Rock Auger:There are three categories of Flat or Butterfly Rock Auger:a) Single Cut Augerb) Double Cut Augerc) Double Cut Auger without Rock Pilot Drilling Diameter Range: 5002500mm 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 pilesiii) Double Cut Auger without rock pilot are recommended for fractured rock or moderately weak to moderately strong rock (550 MPa) Features:1- Rock Pilot2- Hard facing strips on flights for wear protection3- Kelly box size as per customer demand 3) Flat or Butterfly Clay AugerThere are two categories of Flat or Butterfly Rock Auger:a) Single Cut Augerb) Double Cut Auger Drilling Diameter Range: 5002500mm Main Applications:i) The Single Cut and Double Cut Augers are suitable for drilling in clay, silt and loose to medium dense sand and gravelii) The Single Cut and Double Cut Augers with side cutters are suitable for drilling in hard clay, silt and medium to high dense sand and graveliii) Single Cut Augers are recommended up to coarse gravel Features:1- Fish-tail Pilot2- Hard facing strips on flights for wear protection3- Kelly box size as per customer demand