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Bit face designs and carbide button shape selection
Center Drop Face:
For high penetration rates in soft to medium hard and fissured rock formations, Low to medium air pressure,
Maximum hole deviation control.
The all-around application bit face specifically for medium hard and homogeneous rock formations, Good hole
deviation control and good flushing capacity.
For high penetration rates in soft to medium-hard with low to medium air pressure, It is the most resistance to
steel wash, and may reduce the load and wear on gauge buttons, but poor hole deviation control.
This kind of face shape is suitable for hard to very hard and abrasive rock formations in applications with high
air pressures, Good penetration rates an resistance to steel wash.
Domed/round buttons are usually used as gauge buttons of DTH bits, suitable for very abrasive and very
Parabolic buttons are usually used as gauge buttons and front buttons of DTH bits, suitable for medium
abrasive and hard formations.
Ballistic buttons are usually used as front buttons of DTH bits, suitable for medium abrasive and medium
hard formations, They can also be used as gauge buttons if the
rock is soft.
Sharp buttons are usually used as front buttons of DTH bits for soft formations, suitable for high rotation
speed and low bit broken rate soft rock.
For more informations about carbide button bits, drill bits, please contact:
Ms Canny Tang
Tel: 0731-28821498 Fax: 0731-22332243
Skype: ojinxin-18 Email: firstname.lastname@example.org