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Bit face designs and carbide button shape selection

Bit face designs and carbide button shape selection

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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.
 
Concave Face:
The all-around application bit face specifically for medium hard and homogeneous rock formations, Good hole
deviation control and good flushing capacity.
 
Convex Face:
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.
 
Flat Face:
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.
 
Zhuzhou Jinxin Studs Co., Ltd.
 
Domed/Round Button:
Domed/round buttons are usually used as gauge buttons of DTH bits, suitable for very abrasive and very
hard formations.
 
Parabolic/Semi-Ballistic Button:
Parabolic buttons are usually used as gauge buttons and front buttons of DTH bits, suitable for medium
abrasive and hard formations.
 
Ballistic Button:
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:
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.
 
Zhuzhou Jinxin Studs Co., Ltd.
 
For more informations about carbide button bits, drill bits, please contact:
Ms Canny Tang
Tel: 0731-28821498      Fax: 0731-22332243
Mob/WhatsApp: 86-18907331470
Skype: ojinxin-18            Email: sales1@jxcarbide.com