R28/SR28 Button bit
Drifting and tunnelling tools include rods, shank adapters, couplings and bits.
We have mainly 11 threads: SR22,SR25,R25, SR28,R28,SR32,R32,SR38,R38 and T35. Diameter: 38-127mm,They can be used with button bits, cross bits and reaming products.
Advantages:
1. The drill bit body is made of 50R61 steel
2.The head carbide is YK05 or T6
3.Diameter:36mm-51mm
4.Package:in wooden case or in carton.
5.Productivity:50000pcs/ month
DRIFTING AND TUNNELING-R28/SR28 |
|
R28/SR28 Button bit
Button bit |
Carbide dimension |
Dimensions D |
Flushing hole |
|||||
Gauge |
Front |
|||||||
[No.] |
[mm] |
[No.] |
[mm] |
[mm] |
[in] |
Front |
Side |
|
|
5 |
8 |
2 |
7 |
36 |
1 13/32″ |
1 |
3 |
5 |
8 |
2 |
8 |
38 |
1 1/2″ |
1 |
3 |
|
5 |
9 |
2 |
7 |
38 |
1 1/2″ |
1 |
1 |
|
5 |
9 |
2 |
9 |
41 |
1 5/8″ |
1 |
1 |
|
5 |
9.5 |
2 |
8 |
43 |
1 11/16″ |
1 |
1 |
|
5 |
10 |
2 |
9 |
45 |
1 3/4″ |
1 |
1 |
|
5 |
11 |
2 |
9 |
48 |
1 7/8″ |
1 |
1 |
|
|
6 |
8 |
2 |
8 |
43 |
1 11/16″ |
2 |
0 |
6 |
9 |
2 |
9 |
45 |
1 3/4″ |
2 |
0 |
|
|
6 |
9 |
3 |
8 |
45 |
1 3/4″ |
3 |
1 |
6 |
9 |
3 |
9 |
48 |
1 7/8″ |
3 |
1 |
|
6 |
10 |
3 |
9.5 |
51 |
2″ |
3 |
1 |
|
