| High Speed Steel Counter Bores |
|
|
|
With Parallel Shank and Solid Pilot |
Diameter H11
|
Pilot Diameter h9 |
Shank Diameter h9 |
Overall Length |
Cutting Edge Length |
| Over |
Up to and including |
| 2 |
3.05 |
To be specified to suit pilot hole diameter when Ordering |
|
45 |
7 |
| 30.15 |
5 |
|
5 |
56 |
10 |
| 5 |
8 |
|
8 |
71 |
14 |
| 8 |
12.5 |
|
12.5 |
80 |
18 |
| 12.5 |
20 |
|
|
100 |
22 |
|
* Included 2 mm also.
Dimensions in mm.
Specification conform to IS : 5704 - 1988
These Counterbores have RH Helical Flutes Rh Cutting.

|
With Morse Taper Shank and Detachable Pilot
|
Diameter Z9
|
Pilot Diameter e9 |
Pilot Hole Dia
H8 |
Cone Dia. |
Overall Length |
Cutting Edge Length |
| Over |
Up to and including |
Over |
Up to and including |
| 12.5 |
16 |
5 |
14 |
4 |
M3 |
132 |
22 |
| 16 |
20 |
6.3 |
18 |
5 |
M4 |
140 |
25 |
| 20 |
25 |
8 |
22.4 |
6 |
M5 |
150 |
30 |
| 25 |
31.5 |
10 |
28 |
8 |
M6 |
180 |
35 |
| 31.5 |
40 |
12.5 |
35.5 |
10 |
M8 |
190 |
40 |
| 40 |
50 |
16 |
45 |
12 |
M8 |
236 |
50 |
| 50 |
63 |
20 |
56 |
16 |
M10 |
250 |
63 |
* Diameters 12.5 mm and Pilot Diameter= 5 mm are also Included |
|
Dimensions in mm.
Specification conform to IS :5703 - 1988 / ISO 4204 - 1977
These Countersinks have Rh Helical Flutes RH Cutting.

|