KAT drilling tools R28/SR28 thread drill bit suitable for Construction drilling;Drifting, tunneling and bolting;Underground production and long hole drilling.
We have mainly 11 threads: SR22,SR25,R25, SR28,R28,SR32,R32,SR35,SR38,R38 and T35.
Diameter: 38-127mm,They can be used with button bits, cross bits and reaming products.
Advantages:
Higher penetration rate;
Improved reliability;
Longer service life.
Thread button bits made with high quality of best quality alloy steel bar and tungsten carbides, through heat treatment so that it can withstand the toughest rock drilling demands，and transmit intensive impact energy into the rock with the least possible loss of energy
Especially our BIT R28 37mm，R28 38mm,R32 45mm,R32 48 mm, Drill BIT R32 51mm, Button Bit ,Retrac Bit, which is widely welcomed by our client with good quality and good price .
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 | |
