Type: | Drilling Hole |
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Material: | Tungsten Carbide |
Usage: | Metal Drilling |
Brand: | Prodrill |
Application: | Blasting Hole Drilling |
Condition: | New |
Customization: |
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Rock drilling tools factory ProDrill manufactures rock drill bits: T38 Threaded Button Bits is the most important size for benching and long-hole drilling underground.
Code No.: Q12-T38-76
Diameter: 76mm
Length: 155mm
Gauge Buttons: 12mm*12
Front Buttons: 11mm*2
Skirt Design:retrac
Carbide Design: Dome
Face Design: Flat
Water Holes: 2 on front
Diameter 64mm 76mm, 89mm,
Skirt body: retrac, and normal,
Face type: flat, uniface, drop center
Carbide shape: Dome, ballistic, semi-ballistic
Used in bench drilling, underground long hole drilling to match extension MF rod, MM rod heavy duty top hammer.
12 Dome carbide inserts T38 threaded drill bits with flat face design,
76mm diameter and retrac for bench drilling and underground long hole drilling.
Flat-face design detail of T38-76 threaded button bit with dome buttons, retrac, to match with
extension drill steels.
Thread | Diameter range | Skirt Design | Face Design | Button Design | ||||
Normal | Retrac | Flat Face | Drop Centre | Hemispherical | Ballistic | Conical | ||
R22 | yes | no | yes | no | yes | no | no | |
R25 | 35-57mm | yes | no | yes | no | yes | yes | no |
R28 | 36-57mm | yes | no | yes | no | yes | no | no |
R32 | 41-76mm | yes | yes | yes | yes | yes | yes | no |
R35 | 48-51mm | yes | yes | yes | yes | yes | yes | no |
R38 | 57-127mm | yes | yes | yes | yes | yes | yes | yes |
T38 | 64-102mm | yes | yes | yes | yes | yes | yes | yes |
T45 | 76-127mm | yes | yes | yes | yes | yes | yes | yes |
T51 | 89-140mm | yes | yes | yes | yes | yes | yes | yes |
T60 | 102-152mm | yes | yes | yes | yes | yes | yes | yes |
ST58 | 89-140mm | yes | yes | yes | yes | yes | yes | yes |
GT60 | 93-140mm | yes | yes | yes | yes | yes | yes | yes |
ST68 | 102-152mm | yes | yes | yes | yes | yes | yes | no |
Bit Face Shape Selection | Brief introduction |
Drop Center Bit | For high penetration rates in soft to medium hard and fissured rock formations, Low to medium air pressures. Maximum hole deviation control. |
Concave Face | The all-round application bit face specifically for medium hard and homogeneous rock formations. Good hole deviation control and good fishing capacity. |
Convex Face | For high penetration rates m soft to medium-hard with low to medium air pressures. It is the most resistance to steel wash. And many reduce the load and wear on the gauge buttons. But poor hole deviation control. |
Double Gauge Face | This kind face shape is suitable for fast penetration rates in medium to hard rock formations. Designed for high air pressures and good resistance to steel wash step gauge bit. |
Flat Face Bit | This kind of face shape is suitable for hard to very hard and abrasive rock formations in applications with high air pressure. Good penetration rates are resistance to steel wash. |
Carbide button shape selection | Brief introduction |
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 Buttons | 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 Button | Sharp Buttons are usually used as front buttons of DTH bits for soft formations where fast penetration rates are possible. |
Flat Button | Flat buttons are usually used as protection buttons to reduce Near on rubbing surfaces of DTH Bits. |
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