Threaded Button Bit
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General Introduction:
With the top quality of alloy steels and the best carbides made in China, we produce all threaded button bits by hot press technology.
A comprehensive range of various button bits shown as below:
Thread sizes: R22, R25, H25, R28, R32, R35, R38, T38, T45, T51, ST68, GT60
Head diameters: 32mm ~ 152mm;
Face designs; flat face, drop center, uni-face.
Specification Overview:
Button Bits:
| Skirt Shape | Straight (Normal) | Retract | Straightrac |
| Bit Diameter | 35~152mm (1 3/8 ~ 6") | 45~127mm (1 25/32" ~ 5") | 64~102mm (2 1/2" ~ 4") |
| Thread | R22, R25, R28, R32, R35, R38, T38, T45, T51, T60, ST58, ST68. | R25, R28, R32, R35, R38, T38, T45, T51, T60, ST58, ST68. | R38, T38, T45, T51, T60, ST58, ST68. |
| Face Design | Flat, Convex or Drop Center; | Flat, Convex or Drop Center; | Flat, Convex or Drop Center; |
| Inserts Configuration | Domed (Spherical), Hemi-spherical, Ballistic, Parabolic or Conical; | Domed (Spherical), Hemi-spherical, Ballistic, Parabolic or Conical; | Domed (Spherical), Hemi-spherical, Ballistic, Parabolic or Conical; |
Cross Bits & X-Type Bits:
| Bits Type | Cross Bits | X-Type Bits | ||
| Skirt Shape | Straight (Normal) | Retract | Straight (Normal) | Retract |
| Bits Diameter | 35~127 mm | 64~102 mm | 64~127 mm | 64~102 mm |
| (1 3/8” ~ 127”) | (2 1/2” ~ 4”) | (2 1/2” ~ 5”) | (2 1/2” ~ 4”) | |
| Thread | R22, R25, R28, R32, R38, T38, T45, T51, | T38, T45, T51 | T38, T45, T51 | T38, T45, T51 |
How to order?
Button Bit: Diameter + Thread + Skirt Shape + Face Design + Insert Configuration
Cross & X-Type Bit: Diameter + Thread + Skirt Shape
Bit Face Selection
| Face Design | Photo | Application | |
| Flat Face |  | Flat face button drill bits are suitable for all rock conditions, especially for the rock with higher hardness and higher abrasiveness. Such as granite and basalt. | |
| Drop Center |  | Drop center button drill bits are mainly suitable for the rock with low hardness, low abrasiveness, and good integrity. The bits can drill straighter holes. | |
| Convex |  | Convex Face button bits are designed for fast penetration rates in softer rock. | |
Carbide Button Selection
Button Shapes | Photo | Application | |||
| Rock Hardness | Penetration Velocity | Carbide Service Life | Vibration | ||
Spherical |  | Hard | Slower | Longer service life Less prone to breaking | More |
Ballistic |  | Medium Soft | Faster | Shorter service life More prone to breaking | Less |
Conical |  | Soft | Faster | Shorter service life More prone to breaking | Less |
Skirt Selection
| Skirts | Photo | Application | |
Standard Skirt |  | Standard skirt button drill bits are suitable for all rock conditions. | |
Retrac Skirt |  | Retrac button drill bits are mainly used for unconsolidated rock mass with poor integrity. The skirt is designed to improve the straightness of the drilling hole and assist in the retrieval of drill rock tools. | |
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