Ingersoll-Rand 

Hammer model

Gauge diameter

Gauge angle

[°]

Button × Button dia. [mm]

Flushing hole

Weight

[Kg]

Part number

[mm]

[in]

Gauge

Face

DHD3.5

90

3 1/2"

30

8×12

5×12

2

4.7 DH3.5P90R25

95

3 3/4"

30

8×12

6×12

2

4.8 DH3.5P95R25

100

3 15/16"

35

8×14

7×12

2

4.9 DH3.5P100R25

102

4"

35

8×14

7×12

2

4.9 DH3.5P102R25

90

3 1/2"

 20 - 40

6×12

6×12

2

4.7 

DH3.5P90BB81

95

3 3/4"

20 - 40

6×12

6×12

2

4.8 

DH3.5P95BB81

100

3 15/16"

20 - 40

6×12

6×12

2

4.9 

DH3.5P100BB81

102

4"

20 - 40

6×12

6×12

2

4.9 

DH3.5P102BB81

Foot valve

-

FV-DH3.5

DHD340

105

4 1/8"

35

8×14

7×12

2

8.6 DH340P105R25

110

4 5/16"

35

8×14

7×12

2

8.7 DH340P110R25

115

4 1/2"

35

8×14

8×12

2

9.0 DH340P115R25

120

4 3/4"

35

8×14

8×12

2

9.7 DH340P120R25

127

5"

35

8×16

7×14

2

10.6 DH340P127R25

105

4 1/8"

 20 - 40

8×12

8×12

2

8.6 

DH340P105BB81

110

4 5/16"

20 - 40

8×12

8×12

2

8.7 

DH340P110BB81

115

4 1/2"

20 - 40

8×12

8×12

2

9.0 

DH340P115BB81

120

4 3/4"

20 - 40

8×14

8×14

2

9.7 

DH340P120BB81

127

5"

20 - 40

8×14

8×14

2

10.6 

DH340P127BB81

Foot valve

-

FV-DHD340

DHD350

133

5 1/4"

35

8×16

8×14

2

16.0 DH350P133R25

140

5 1/2"

35

8×16

9×14

2

16.4 DH350P140R25

146

5 3/4"

35

8×19

8×16

2

16.8 DH350P146R25

152

6"

35

8×19

10×16

2

18.1 DH350P152R25

133

5 1/4"

20 - 40

8×14

8×14

2

16.0 

DH350P133BB81

140

5 1/2"

20 - 40

8×14

10×14

2

16.4 

DH350P140BB81

146

5 3/4"

20 - 40

8×14

10×14

2

16.8 

DH350P146BB81

152

6"

20 - 40

8×14

10×16

2

18.1 

DH350P152BB81

Foot valve

-

FV-DHD350

 Face angle 20°,Gauge angle 40°

Flat face design R25

Concave design R65

Convex design BB81

For drilling in a medium-hard to hard and 

abrasive rock.

The all-round application bit specifi cally 

designed for medium hard and homogeneous 

rock formations.

Excellent hole deviation control and fl ushing 

volume.

Bit design with excellent fl ushing volume. For 

drilling at high penetration rates in non-abrasive 

rock.

76  

DOWN THE HOLE BIT

DOWN THE HOLE BIT

Foot valve