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Cutting Tools
Overview – Machine thread drills/former
Material group
Thread type
UNF
UNF
Pg
M
M
M
M
MF
MF
Colour ring
green
green
Order No.
1748
1749
1777
1780
1783
1784
1787
1785
1789
Threaded section
Nr. 10–32"–
1–12"
Nr. 10–32"–
1–12"
7–36
M3–M16
M3–M12
M3–M16
M3–M16
M6–M20
M6–M20
For through threads
≤ 3 x D
≤ 1.5 x D
≥ 1.0 x D
≥ 1.0 x D
≥ 1.0 x D
≥ 1.0 x D
≥ 1.0 x D
≥ 1.0 x D
For blind holes
≤ 3 x D
≤ 1.5 x D
≥ 1.0 x D
≥ 1.0 x D
≥ 1.0 x D
≥ 1.0 x D
≥ 1.0 x D
≥ 1.0 x D
Type/form
N/B
N/C
N/C
N
N
N
INOX
N
INOX
Material
HSS-E
HSS-E
HSS-E
HSS-E
HSS-E
HSS-E
HSS-E PM HSS-E
HSS-E PM
Tolerance zone
2 B
2 B
6 HX
6 GX
6 HX
6 HX
6 HX
6 HX
Surface
steam
steam
bright
TiN
TiN
TiN
TiN
TiN
TiN
Page
1/207
1/207
1/209
1/209
1/209
1/209
1/210
1/210
1/210
Steels
up to
850
N/mm
2
C
C
C
C
C
C
C
C
C
Steels
up to
850
N/mm
2
C
C
C
C
C
C
C
C
Steels
up to
850
N/mm
2
C
C
C
C
C
C
Steels
up to
42 HRC
C
Steels
up to
52 HRC
Steels
up to
56 HRC
Steels
up to
60 HRC
Hard
machining
over
60 HRC
Stainless
and acid-
resistant
steels (INOX)
C
C
C
C
C
C
Ti steels,
Ti alloys,
special
steels
C
C
C
C
C
C
Cast iron
materials
Al,
AI and
Mg alloys
C
C
C
C
C
C
C
C
C
Copper,
brass,
bronze
C
recommended
U
suitable
V
limited suitability
Thread Cutting Tools
171