T51 102mm Button Bits for Thread Extension Rod
Premium Threaded Button Drilling Bits for Tunneling
Our thread button drill bits are manufactured from high-quality alloy steel bar and tungsten carbides. Through precise heat treatment, these drilling tools achieve exceptional toughness to meet demanding rock drilling applications while minimizing energy loss during operation.
Key Features
- Customizable designs available for various drilling applications
- Suitable for soft rock, loose-medium rock, and hard rock drilling
- Compatible with multiple thread types: R22, R25, R28, R32, R35, R38, T38, T45, T51, ST58, T60
- Ideal for hard rock drilling (f=8~18)
- Manufactured from premium 42CrMo alloy steel
- Features YK05 carbide tips for enhanced durability
- Available in hot-pressing or welding technology options
Ordering Information
Please confirm these specifications before ordering:
- Thread Type
- Standard or Retrac configuration
- Button shape (Spherical or Ballistic)
- Bit face shape (Drop Center, Flat Face, Convex, Concave, etc.)
Technical Specifications
R32 Thread Button Bits
| Name |
Diameter (mm) |
Tip Size (mm) |
Flushing Holes |
| R32 thread button bits |
41 |
4*9 (front), 2*8 (side) |
1 front, 1 side |
|
43 |
4*9 (front), 2*9 (side) |
1 front, 1 side |
|
45 |
4*10 (front), 2*9 (side) |
1 front, 1 side |
| R32 Retrac thread button bits |
60 |
6*9 (front), 4*8 (side) |
0 front, 3 side |
|
64 |
6*9 (front), 4*9 (side) |
0 front, 3 side |
|
70 |
6*10 (front), 4*10 (side) |
0 front, 3 side |
T38 Thread Button Bits
| Name |
Diameter (mm) |
Tip Size (mm) |
Flushing Holes |
| T38 thread button bits |
57 |
5*11 (front), 3*10 (side) |
1 front, 1 side |
|
64 |
5*12 (front), 3*11 (side) |
1 front, 1 side |
|
76 |
5*14 (front), 3*12 (side) |
1 front, 2 side |
| T38 Retrac thread button bits |
60 |
8*9 (front), 3*9 (side) |
2 front, 2 side |
|
64 |
8*9 (front), 4*9 (side) |
2 front, 2 side |
|
70 |
8*10 (front), 4*10 (side) |
2 front, 2 side |
|
76 |
8*11 (front), 4*10 (side) |
2 front, 2 side |
|
89 |
8*12 (front), 5*12 (side) |
2 front, 2 side |
T45 Thread Button Bits
| Name |
Diameter (mm) |
Tip Size (mm) |
Flushing Holes |
| T45 thread button bits |
70 |
6*11 (front), 4*10 (side) |
0 front, 2 side |
|
76 |
6*13 (front), 4*10 (side) |
0 front, 2 side |
|
89 |
8*12 (front), 5*12 (side) |
2 front, 2 side |
|
102 |
8*13 (front), 6*12 (side) |
2 front, 2 side |
|
115 |
8*14 (front), 6*13 (side) |
2 front, 2 side |
T51 Thread Button Bits
| Name |
Diameter (mm) |
Tip Size (mm) |
Flushing Holes |
| T51 thread button bits |
89 |
8*12 (front), 5*12 (side) |
2 front, 2 side |
|
102 |
8*13 (front), 6*12 (side) |
2 front, 2 side |
|
115 |
8*14 (front), 6*13 (side) |
2 front, 2 side |
|
127 |
8*14 (front), 6*14 (side) |
2 front, 2 side |
| T51 Retrac thread button bits |
89 |
8*11 (front), 5*12 (side) |
2 front, 2 side |
|
102 |
8*11 (front), 6*12 (side) |
2 front, 2 side |
|
115 |
8*12 (front), 6*13 (side) |
2 front, 2 side |
|
127 |
8*12 (front), 6*14 (side) |
2 front, 2 side |
Product Images
