2

OVERVIEW  MAP

Model

Pilot Bit

Casing

Type

Casing Outer

ø mm (in.)

Application

Pile Type Example

• Piling

construction

89.1–1016

(3 1/2"–40")

...Fig.1

• Piling

construction

...Fig.1

Permanent

114.3–457.2

(4 1/2"–8")

...Fig.2

...Fig.2

Permanent

or

Retrievable

• Anchor

construction

• Foundation

construction

• Water well
• Geothermal

...Fig.2

...Fig.2

• Water well
• Geothermal

89.1–1016

(3 1/2"–40")

...Fig.3

...Fig.3

Retrievable

• Foundation

construction

• RD Pile

114.3–355.6

(4 1/2"–14")

...Fig.1
...Fig.1

...Fig.4

...Fig.4

Permanent

Single Pass Model

St

andard

-D

TH

Sy

st

em

Big

 Bore

-D

TH

Sy

st

em

To

p H

am

m

e

r

Sy

st

em

• Suitable for relatively soft ground and 

 short hole depth.

• Leaving a casing pipe in the ground.

• Thread connection ring set.

For DTH Hammer

• Pilot Bit is manufactured in 

  Single, Normal and Multi pass 

  modelas long as casing size 

  is same.

For DTH Hammer

For Top Hammer

Normal Model

• Suitable for heavy duty single pass and 

 longer hole depth.

• Leaving a casing pipe in the ground.

• Thread connection ring set.

Multi Use Model

• Pulling force to remove casing is reduced. 

• This enables the casing pipe to be re-used.

• Interlinked ring set.

Big Bore Model

• Suitable for large bore drilling. 

• Interlinked ring set.

• Suitable for small hole tunneling.

• Thread connection ring set.

• Pipe roof

• Piling

construction

76.3–139.7

(3"–5 1/2")

Permanent

Top Hammer Model

So

ft

 grou

nd

Ro

ck

Drilling

Pull out a

pilot bit

Insert

structural

object

Pull out a

casing pipe

*

1

*

2

*

1 Limited to shallow hole drilling only.

*

2 Refer to page 19.

So

ft

 grou

nd

Ro

ck

Drilling

Pull out a

pilot bit

Re-drilling

into rock

Single DTH bit

*

3 If hard ground is encountered, the ULTRA MAXBIT can be removed 

and drilling can be switched to a small diameter DTH BIT.

*

3

Support

Face Bolting

Fore Pilling

Pilling

Water well and Geothermal

Fig.2

Foundation construction

(Temporary casing)

Fig.3

Tunneling

(Permanent casing)

Fig.4