4

90

115

140

165

187

215

240

280

315

365

410

460

510

560

600

125

152

185

215

237

272

290

340

373

425

478

530

580

630

685

92

115

141

167

187

218

240

283

316

365

414

463

511

561

603

4.92

5.98

7.28

8.46

9.33

10.71

11.42

13.39

14.69

16.73

18.82

20.87

22.83

24.80

26.97

91

114

140

166

186

217

232

281

314

363

412

461

509

559

600

3.58

4.49

5.51

6.54

7.32

8.54

9.13

11.06

12.36

14.29

16.22

18.15

20.04

22.01

23.62

114.3

141.3

165.2

190.7

216.3

254.0

273.1

318.5

355.6

406.4

457.2

508.0

558.8

609.6

660.4

102.3

126.6

153.2

178.7

202.3

241.0

254.5

301.7

336.6

387.4

435.0

482.6

533.4

584.2

631.8

4"

5"

6"

7"

8"

9"

10"

12"

14"

16"

18"

20"

22"

24"

26"

*

1

*

2

*

3

*

4

*

5

mm

in.

mm

in.

mm

mm

in.

mm

3"

4"

5"

6"

6"

8"

8"

10"

12"

12"

15"

15"
18"

15"
18"

18"

20"

in.

a

a

a

a

a

aa

a

a

a

a

a

a

a

a

a

Casing Shoe

Two

Wing

Three

Wing

Type

Bit Gauge

Extended

D

1

Retracted

Max. O.D.

D

2

Min. I.D.

D

3

Nominal

Size

Applicable Casing Pipe

Device

O. D.

D

4

Hammer

Size

Casing Pipe

Ca

sing

 O

. D

.

Ca

sing

 I.

 D

.

B

it G

a

u

g

e (

E

xt

e

n

d

e

d)

De

vic

e

D

4

D

1

D

3

D

2

*

1 : Water Well

*

2 : Piling, Foundation

*

3 : Pipe Roof, Water Service, Water Remove, Anchoring

*

4 : Geothermal, Oil Well

*

5 : Fore Piling

*

 When ordering, information about casing diameters

 (O.D. and I.D.) is necessary.

*

 Order made bits can be manufactured upon request.

APPROPRIATE CASING AND HAMMER SIZE