Drifting and tunnelling tools include rods, shank adapters, couplings and bits. We provide a comprehensive range of high-performance tools designed for the most demanding excavation environments.
We have mainly 11 threads: SR22, SR25, R25, SR28, R28, SR32, R32, SR38, R38 and T35. With diameters ranging from 38-127mm, these components are fully compatible with button bits, cross bits, and reaming products.
Key Advantages
1
The drill bit body is engineered from premium 50R61 steel for maximum durability.
2
Utilizes high-grade head carbide YK05 or T6 for superior rock penetration.
3
Wide diameter range available from 36mm to 51mm to suit various project needs.
4
Professional packaging in wooden cases or cartons to ensure safe transit.
5
High productivity capacity of 50,000pcs per month to meet bulk demands.
Drifting and Tunneling - R28/SR28
R28/SR28 Button Bit Specifications
| Button Bit |
Carbide Dimension |
Dimensions D |
Flushing Hole |
| Gauge |
Front |
[mm] |
[in] |
Front |
Side |
| [No.] |
[mm] |
[No.] |
[mm] |
 |
5 |
8 |
2 |
7 |
36 |
1 13/32″ |
1 |
3 |
| R28-38 |
5 |
8 |
2 |
8 |
38 |
1 1/2″ |
1 |
3 |
| R28-38V |
5 |
9 |
2 |
7 |
38 |
1 1/2″ |
1 |
1 |
| R28-41 |
5 |
9 |
2 |
9 |
41 |
1 5/8″ |
1 |
1 |
| R28-43 |
5 |
9.5 |
2 |
8 |
43 |
1 11/16″ |
1 |
1 |
| R28-45 |
5 |
10 |
2 |
9 |
45 |
1 3/4″ |
1 |
1 |
| R28-48 |
5 |
11 |
2 |
9 |
48 |
1 7/8″ |
1 |
1 |
Product Gallery
Frequently Asked Questions
What materials are used for the drill bit body?
The drill bit body is manufactured using high-quality 50R61 steel, ensuring high strength and resistance to wear during intense drilling operations.
Which thread types do you offer for drifting and tunneling?
We offer 11 main thread types including SR22, SR25, R25, SR28, R28, SR32, R32, SR38, R38, and T35 to ensure compatibility with various drilling equipment.
What is your monthly production capacity for these tools?
Our facility has a stable productivity rate of approximately 50,000 pieces per month, allowing us to support large-scale tunneling and mining projects.
What types of carbide heads are available?
We use industry-standard YK05 or T6 head carbides, which are renowned for their hardness and efficiency in various rock formations.
How are the products packaged for international shipping?
To prevent damage during transport, we pack our tools securely in either heavy-duty wooden cases or reinforced cartons, depending on the order size and customer preference.
What diameter range is covered by your button bits?
Our drifting and tunneling button bits generally range from 36mm to 51mm, while overall drifting tools cover diameters from 38mm up to 127mm.
KAT DRILLING
