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Hammer Bit

Specification

Hammer
Model
BIT Sizes
in. (mm)
BIT Weight
Kg (Lb.)
Front Design
DH 275 13' (330mm) 185 (407)
Concave, Flat
15' (381mm)
218 (480)
17 1/2' (445mm)
240(528)
DH 330

15' (381mm) 230 (506)
Concave, Flat

17 1/2' (435mm)   255 (561)
17 1/2' (445mm)   268 (590)
19' (483mm)
280 (616)
21' (533)mm 300 (569)
DH 350  17 1/2' (445mm)   290 (640)
 Concave, Flat
21' (533)mm 413 (909)
25' (635mm)
560 (1232)
DH 430 20' (508mm) 530 (1166)
Concave, Flat
25' (635mm)
585 (1287)
32' (810mm)
702 (1584)

* Bit Weights are approximate.

 

Application of D.T.H Hammer Bit

Type
Typical shape
Application
Flat face
These bits are designed to drill the hard formations faster.
They have high resistance to abrasive wear and accept heavy compressive
loads to achieve greater penetration rates
Concave These bits are used in all formatins from medium to very hard.
Concaved relief grooves provide greater efficiency in the larger sizes.
Convex These bits are designed to drill the soft formations faster.
Grooves in the face allow for fast removal of cuttings.

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