5

CASING PIPE ø177.8mm (7")

CASING PIPE ø190.7mm (7 1/2")

Casing Pipe

Ring Bit

Pilot Bit

Wall Max.

Thickness

Type

Model

Compatible

Part

System Part

Number

Outer

Dia.

Inner

Dia.

Hammer

Weight

(kg)

Weight

(kg)

Ri

n

g S

e

t

(R

in

g B

it &

Ca

sing

 Shoe

)

D

2

D

4

Outer

Dia.

D

1

Outer

Dia.

D

3

t

168.3

(6 5/8")

12.7

(0.50")

10.0

(0.39")

8.0

(0.31")

177.8

(7")

190.7

(7 1/2")

12.7

(0.50")

11.5

(0.45")

10.0

(0.39")

4.8

(0.19")

6.0

(0.24")

5.3

(0.21")

Single pass

Normal

Multi use

Single pass

Normal

Multi use

Single pass

Normal

8.9

9.0

8.0

7.5

7.6

7.1

7.8

7.9

118A Pilot bit

126A Pilot bit

118

4.65"

118

4.65"

118

4.65"

126

4.96"

126

4.96"

126

4.96"

126

4.96"

126

4.96"

178

7.01"

178

7.01"

175

6.89"

178

7.01"

178

7.01"

175

6.89"

178

7.01"

178

7.01"

140

5.51"

140

5.51"

140

5.51"

146

5.75"

146

5.75"

146

5.75"

146

5.75"

146

5.75"

118A

118A

118W

126A

126A

126W

126B

126B

US118A-05-R-041

UN118A-05-R-081

UM118W-05-R-377

US126A-05-R-053

UN126A-05-R-058

UM126W-05-R-379

US126B-05-R-380

UN126B-05-R-381

CASING PIPE ø168.3mm (6 5/8")

Unit: mm  (Upper)

inch (Bottom)

DHD350

QL50

SD5

DHD350

QL50

SD5

DHD350

QL50

SD5

DHD350

QL50

SD5

DHD350

QL50

SD5

DHD350

QL50

SD5

DHD350

QL50

SD5

DHD350

QL50

SD5

25.5
25.0
25.0
25.5
25.0
25.0
25.5
25.0
25.0
27.0
26.5
26.5
27.0
26.5
26.5
27.0
26.5
26.5
27.0
26.5
26.5
27.0
26.5
26.5

Single pass

Normal

Multi use

Single pass

Multi use

Normal

9.6

9.7

9.1

9.7

9.5

7.1

127

5.00"

127

5.00"

127

5.00"

127

5.00"

127

5.00"

142

5.59"

188

7.40"

188

7.40"

186

7.32"

188

7.40"

186

7.32"

188

7.40"

149

5.87"

149

5.87"

149

5.87"

149

5.87"

149

5.87"

164.5

6.48"

127A

127A

127W

127C

127X

142A

US127A-05-R-043

UN127A-05-R-079

UM127W-05-R-287

US127C-05-R-142

UM127X-05-R-382

UN142A-06-R-131

DHD350

QL50

SD5

DHD350

QL50

SD5

DHD350

QL50

SD5

DHD350

QL50

SD5

DHD350

QL50

SD5

DHD360

QL60

SD6

28.5
27.5
27.5
28.5
27.5
27.5
28.5
27.5
27.5
28.5
27.5
27.5
28.5
27.5
27.5
38.5
38.0
41.0

Single pass

Normal

Single pass

Normal

7.5

7.6

7.6

7.7

156

6.14"

156

6.14"

156

6.14"

156

6.14"

206

8.11"

206

8.11"

206

8.11"

206

8.11"

176.5

6.95"

176.5

6.95"

176.5

6.95"

176.5

6.95"

156A

156A

156B

156B

US156A-06-R-155

UN156A-06-R-383

US156B-06-R-384

UN156B-06-R-385

DHD360

QL60

SD6

DHD360

QL60

SD6

DHD360

QL60

SD6

DHD360

QL60

SD6

42.0
41.5
44.5
42.0
41.5
44.5
42.0
41.5
44.5
42.0
41.5
44.5

126A Pilot bit

126A Ring bit

126A Pilot bit

126A Ring bit

127A Pilot bit

127A Pilot bit

127A Ring bit

127A Pilot bit

156A Pilot bit

156A Ring bit

156A Pilot bit

156A Ring bit

Note 1) Normal model enables to be re-used in case of short hole drilling.
Note 2) To order, please advise the system type, casing size / hammer size and the ring bit models.
Note 3) Special types are also available according to costomer's request.

DIMENSIONS

y

 Standard Type ULTRA MAXBIT / DTH

165.2

(6 1/2")

6.0

(0.24")

5.0

(0.20")

Single pass

Normal

Normal

8.0 

6.5 

6.5 

128

5.04"

128

5.04"

128

5.04"

178

7.01"

178

7.01"

178

7.01"

149

5.87"

149

5.87"

149

5.87"

128A

128A

128B

US128A-05-R-378

UN128A-05-BB-026

UN128B-05-R-256

CASING PIPE ø165.2mm (6 1/2")

DHD350

QL50

SD5

DHD350

QL50

SD5

DHD350

QL50

SD5

30.0
29.5
29.5
30.0
29.5
29.5
30.0
29.5
29.5

128A Pilot bit

128A Ring bit