Drilling buckets for Kelly drilling

No. of cutters - reamer bar

reamer bar

Pilot - none

none

Range of application - Cleaning the bottom of the borehole

Cleaning the bottom of the borehole

No. of cutters - reamer bar

reamer bar

Pilot - none

none

Range of application - Cleaning the bottom of the borehole

Cleaning the bottom of the borehole

No. of cutters - single-start

single-start

Pilot - Fishtail pilot bit

Fishtail pilot bit

Range of application - Firm to very stiff cohesive soils as well as in loosely to densely consolidated non-cohesive soils.

Firm to very stiff cohesive soils as well as in loosely to densely consolidated non-cohesive soils.

No. of cutters - single-start

single-start

Pilot - Round shank chisel

Round shank chisel

Range of application - Very densely consolidated non-cohesive soils and low strength rock up to approx. 50 Mpa.

Very densely consolidated non-cohesive soils and low strength rock up to approx. 50 Mpa.

No. of cutters - double-start

double-start

Pilot - Round shank chisel

Round shank chisel

Range of application - Very densely consolidated non-cohesive soils, low strength rock up to approx. 50 Mpa and secant bored piled walls.

Very densely consolidated non-cohesive soils, low strength rock up to approx. 50 Mpa and secant bored piled walls.

No. of cutters - single-start

single-start

Pilot - Fishtail pilot bit

Fishtail pilot bit

Range of application - Firm to very stiff cohesive soils as well as in loosely to densely consolidated non-cohesive soils.

Firm to very stiff cohesive soils as well as in loosely to densely consolidated non-cohesive soils.

No. of cutters - single-start

single-start

Pilot - Round shank chisel

Round shank chisel

Range of application - Very densely consolidated non-cohesive soils and low strength rock up to approx. 50 Mpa.

Very densely consolidated non-cohesive soils and low strength rock up to approx. 50 Mpa.

No. of cutters - double-start

double-start

Pilot - Round shank chisel

Round shank chisel

Range of application - Very densely consolidated non-cohesive soils, low strength rock up to approx. 50 Mpa and secant bored piled walls.

Very densely consolidated non-cohesive soils, low strength rock up to approx. 50 Mpa and secant bored piled walls.

No. of cutters - double-start

double-start

Pilot - Round shank chisel

Round shank chisel

Range of application - Firm to very stiff cohesive soils as well as in loosely to densely consolidated non-cohesive soils.

Firm to very stiff cohesive soils as well as in loosely to densely consolidated non-cohesive soils.

No. of cutters - double-start

double-start

Pilot - Round shank chisel

Round shank chisel

Range of application - Firm to very stiff cohesive soils as well as in loosely to densely consolidated non-cohesive soils.

Firm to very stiff cohesive soils as well as in loosely to densely consolidated non-cohesive soils.