Counterbores with straight shank and fixed pilot are made from high speed steel.
They are used for counterboring holes for screwa with flat fillister hand in normal materials.
It is possible to counterbore prebored holes for screw body.
STC046, HSS SOLID CAP SCREW COUNTERBORE, DIN373 |
3-Flute, Material: HSS, HSS-E. |
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Pict
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Screw Size |
Cutting Diameter |
Pilot Diameter |
Shank Diameter |
Total Length |
Flute Number |
1 |
2.2 |
0.75 |
2.2 |
45 |
2 |
1.2 |
2.5 |
0.95 |
2.5 |
45 |
2 |
1.4 |
2.8 |
1.1 |
2.8 |
45 |
2 |
1.6 |
3.3 |
1.25 |
3.3 |
56 |
2 |
1.8 |
3.8 |
1.45 |
3.8 |
56 |
2 |
2 |
4.3 |
1.6 |
4.3 |
56 |
2 |
2.5 |
5 |
2.05 |
5 |
56 |
2 |
3 |
6 |
2.5 |
5 |
71 |
3 |
3.5 |
6.5 |
2.9 |
5 |
71 |
3 |
4 |
8 |
3.3 |
5 |
71 |
3 |
4.5 |
9 |
3.7 |
8 |
80 |
3 |
5 |
10 |
4.2 |
8 |
80 |
3 |
6 |
11 |
5 |
8 |
80 |
3 |
7 |
13 |
6 |
12.5 |
100 |
3 |
8 |
15 |
6.8 |
12.5 |
100 |
3 |
9 |
16 |
7.8 |
12.5 |
100 |
3 |
10 |
18 |
8.5 |
12.5 |
100 |
3 |
12 |
20 |
10.2 |
12.5 |
100 |
3 |
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STC044-M, COUNTERSINKS, Straight Shank |
GB/T 4258-2004, GOST 14953-80 |
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Pict
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Included Angle: 60°, 90°, 120° |
Size |
Small End Diameter |
Shank Diameter |
Size |
Small End Diameter |
Shank Diameter |
8 |
1.6 |
8 |
16 |
3.2 |
10 |
10 |
2 |
8 |
20 |
4 |
10 |
12.5 |
2.5 |
8 |
25 |
7 |
10 |
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STC044-MT, COUNTERSINKS, Taper Shank |
Bitmap
GB/T 1143-2004, GOST 14953-80 |
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Included Angle: 60°, 90°, 120° |
Size |
Small End Diameter |
M.T. Shank |
Size |
Small End Diameter |
M.T. Shank |
16 |
3.2 |
1 |
40 |
12.5 |
3 |
20 |
4 |
2 |
50 |
16 |
3 |
25 |
7 |
2 |
63 |
20 |
4 |
31.5 |
9 |
2 |
80 |
25 |
4 |