Page 13 - Industrial Tools Catalog (1)

Drilling tools \ Technical introduction – solid carbide / HSSE drilling

bore types and surfaces

machining type rough machining medium finishing smoothing
hole quality IT11 IT10 IT9 IT8 IT7 IT6
bore ∅
1 mm Ø 1–20 mm Ø 1–40 mm
3 mm

6 mm
9 mm Ø 8–40 mm
12 mm
Ø 12–55 mm
15 mm
18 mm
21 mm

24 mm
27 mm
solid drilling/reaming 30 mm

33 mm
36 mm

39 mm
42 mm

45 mm
48 mm
51 mm
54 mm

57 mm
60 mm
63 mm
66 mm
69 mm

Source: Hahn+Kolb Werkzeuge GmbH
Technical data subject to change. www.iconridge.com 13
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