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Extra-short twist drills, L.H., metric sizes (DIN 1897 LN) HSS
Nominal diameter Dh8 mm
Overall length L mm
Flute length l mm
0.70
23
4.50
0.80
24
5.00
0.90
25
5.50
1.00
26
6.00
1.10
28
7.00
1.20
30
8.00
1.30
32
9.00
1.40
1.50
34
10.00
1.60
1.70
36
11.00
1.80
1.90
38
12.00
2.00
2.10
40
13.00
2.20
2.30
43
14.00
2.40
2.60
2.70
46
16.00
3.00
45
3.10
49
18.00
3.30
3.40
52
20.00
3.70
3.80
55
22.00
4.20
4.30
58
24.00
4.70
4.80
66
28.00
6.10
70
31.00
6.70
6.80
74
34.00
7.50
7.60
79
37.00
8.50
8.60
84
40.00
9.50
9.60
89
43.00
10.50
10.60
95
47.00
11.80
11.90
102
51.00
13.20
13.30
107
54.00
Microdrills, flute-ground, reinforced shank, metric sizes (DIN 1899 RN) HSS
0.25
0.27
0.28
0.30
0.31
0.33
0.34
2.80
0.36
0.38
0.40
0.41
3.50
0.44
0.45
0.49
0.50
4.00
0.54
0.55
0.59
0.60
0.64
0.65
0.69
0.74
0.75
0.79
0.99
1.45
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