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DTH Bit Carbide Button Shape Selection
Oct 24, 2018

DTH Bit Carbide Button Shape Selection



Button type

 

Applications

 

 

Spherical button

1

 

 

·Universal  button

 

·Wearing  resistance good

 

·Best  suited to hard  ground

 

·27,000-48,000  PSI  (180  to 320  MPa)

 

·Abrasive  to very  abrasive

 

 

Hemispherical button

2

 

 

·Universal  button

 

·Wearing  resistance good

 

·Best  suited to hard  ground

 

·25,000-45,000  PSI  (170  to 300  MPa)

 

·Abrasive  to very  abrasive

 

 

Parabolic button

3

 

 

 ·Universal  button

 

·Fast  penetration

 

·Best  suited to medium to hard  rock

 

·15,000-25,000  PSI  (100  to 170  MPa)

 

·Mildly  abrasive  ground

 

 

Conical button

4

 

 

 

 ·Fast  penetration

 

·Best  suited for smaller diameter bits

 

·Suited  for all  non-abrasive ground  types

 

 

Ballistic  button

5

 

 

 ·Fast  penetration

 

·Best  suited to soft  rock

 

·10,000-20,000  PSI  (70  to 140  MPa)

 

·Non  abrasive  ground


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