GÜHRING HIGH-PERFORMANCE TOOLS FOR

MACHINING FIBRE COMPOSITE MATERIALS

• without fraying of fibres and delamination
• for optimal component surface finish quality

Machining modern composite materials

GÜHRING – YOUR WORLDWIDE PARTNER

Pictograms

Tool material PKD

Solid carbide Polycrystalline diamond

Surface finish

bright TiCN Cristall

Ø-tolerance e10 h6 h7 h8 m7

Shank form HA Cyl

to DIN 6535

DIN ~DIN DIN

Standard 6539 371 371 WN

to Guhring std.

Type N R15 FK CR 100 FR 100 TM SP MTM3

SP

Form C D

Hole type

Through holes and blind holes

Cutting direction R
right-hand

Applications

slotting roughing ramping Helix drilling finishing copying

Lenght

long (DIN) medium length

No. of cutting edges

no. of cutting lips

Web thinning

0° 2-4° 4° 10° 30°

Helix angle

size of helix angle / no. of different helix angles

Rake angle

rake angle of circumferential cutting edges

Infeed

for lateral for lateral infeed and for lateral infeed,

infeed ramping ramping and drilling

Point angle
90° 120°
MACHINING MODERN

COMPOSITE MATERIALS
Modern fibre reinforced plastics (FRP’s) are making an entry into
a broad range of industrial applications for reasons of efficiency,
weight reduction, strength and dynamics. With their specific
properties they extend the group of conventional metal lightweight
construction materials such as aluminium- and titanium-alloys.
FRP’s or multi-material combinations, ie. a mixture of FRP and
metallic materials, are therefore no longer exclusively retained for
the aerospace industry, motorsport and other high-end
applications. It is especially worth high-lighting the great growth in
the general automotive and commercial vehicle technology.

FRP’s are applied where high specific strength and low weight as
well as high dynamic or energy efficient processes can be found.
For the machining of CFRP, GFRP and stacks (FRP-metal-layer
composite) without component damage, cutting edge quality and
wear resistance of the tool material are of absolute importance.
Guhring provides special solid carbide, coated carbide and PCD
tooling solutions for these demanding materials. They are specially
adapted to the respective material structure and ensure optimum
chip evacuation as well as uniform hole diameters across
all materials.

CHALLENGES
components without fraying of fibres
delamination-free component surface finish
no component damage through
“peel-up” or “push-out”
prevention of split fibres on component
minimising burr development
prevention of thermal damage
 TOOLS
FOR THE MACHINING OF MODERN
COMPOSITE MATERIALS

END MILLS
from Ø 8.00 mm to Ø 12.70 mm
see page 26

SOLID CARBIDE
DRILLS
from Ø 2.50 mm to Ø 12.70 mm
see pages 7 – 8

Solid carbide END MILLS Z=1

from Ø 2.00 mm to Ø 16.00 mm
see page 9

Solid carbide

4
 PCD DRILLS
from Ø 2.70 mm to Ø 12.70 mm
see pages 20-21

TAPS THREAD MILLING CUTTERS

from M3 mm to M16 mm from M1.6 mm to M20x1.5 mm
see page 16-17 see page 18-19

Solid carbide Solid carbide

KEVLAR END MILLS FR 100

from Ø 4.00 mm to Ø 12.70 mm
see pages 13-14

Solid carbide

KEVLAR END MILLS CR 100

from Ø 4.00 mm to Ø 16.00 mm
see pages 10 -12

Solid
lid carbide

SLOT DRILLS Z=2 SLOT DRILLS Z=3

from Ø 4.00 mm to Ø 20.00 mm from Ø 14.00 mm to Ø 20.00 mm
see page 22-23 see page 24-25

PCD COMPRESSION MILLING

CUTTERS
from Ø 12.70 mm to Ø 16.00 mm
see page 27

5
RESULT OF A DRILLING OPERATION
WITH SPECIALISED GUHRING TOOLING SOLUTIONS

Machining with a Guhring tool retains the

structure and direction of the fibres in
the component, as the REM examination
shows. The fibres are neither pressed into
the matrix or ripped out of the composite.

CRFP cut surface with 500-fold

magnification

Optimal machining results in CFRP

no peel-up – no push-out

hole exit in CFRP hole exit in

with woven cover layer unidirectional CFRP
hole d = 6.35 mm hole d = 6.35 mm
 Straight shank twist drills

Stub drills

DIN Tool material solid carbide

3xD 6539 h7
118° Surface finish
Cutting direction R

d1
l2
l1

Article no. 730

d1 d1 l1 l2
Availability
mm inch mm mm
2.500 43.00 14.00 ‡
3.000 46.00 16.00 ‡
3.200 49.00 18.00 ‡
3.260 49.00 18.00 ‡
3.300 49.00 18.00 ‡
3.500 52.00 20.00 ‡
3.570 9/64 52.00 20.00 ‡
3.600 52.00 20.00 ‡
4.000 55.00 22.00 ‡
4.100 55.00 22.00 ‡
4.500 58.00 24.00 ‡
4.760 3/16 62.00 26.00 ‡
4.800 62.00 26.00 ‡
5.000 62.00 26.00 ‡
5.500 66.00 28.00 ‡
6.000 66.00 28.00 ‡
6.350 1/4 70.00 31.00 ‡
6.400 70.00 31.00 ‡
6.500 70.00 31.00 ‡
7.000 74.00 34.00 ‡
7.500 74.00 34.00 ‡
8.000 79.00 37.00 ‡
8.500 79.00 37.00 ‡
9.000 84.00 40.00 ‡
9.500 84.00 40.00 ‡
10.000 89.00 43.00 ‡
12.700 1/2 102.00 51.00 ‡

Material Process Cutting speed Feed rate

CFRP GFRP
40-130 m/min 0.03 - 0.15 f (mm/rev)
aramid

7
Straight shank twist drills

Kevlar drills

Tool material solid carbide

WN FK h8
Surface finish
Cutting direction R

d1
l2
l1

Article no. 1149

d1 d1 l1 l2
Availability
mm inch mm mm
2.500 43.00 14.00 ‡
3.200 49.00 18.00 ‡
3.570 9/64 52.00 20.00 ‡
4.000 55.00 22.00 ‡
4.760 3/16 62.00 26.00 ‡
5.000 62.00 26.00 ‡
6.000 66.00 28.00 ‡
8.000 79.00 37.00 ‡
10.000 89.00 43.00 ‡

Material Process Cutting speed Feed rate

CFRP GFRP
40-130 m/min 0.03 - 0.15 f (mm/rev.)
aramid

8
 Standard end mills

End mills Z=1

30° Tool material solid carbide

WN 1 Surface finish
Cutting direction R

polished flutes, centre cutting

d2

d1
l2
l1

Article no. 6793

d1 h10 d2 h6 l1 l2 Z
Availability
mm mm mm mm
2.000 2.00 38 10.0 1 ‡
3.000 3.00 39 12.0 1 ‡
4.000 4.00 40 15.0 1 ‡
5.000 5.00 50 16.0 1 ‡
6.000 6.00 57 20.0 1 ‡
8.000 8.00 63 22.0 1 ‡
10.000 10.00 73 25.0 1 ‡
12.000 12.00 83 30.0 1 ‡
16.000 16.00 92 35.0 1 ‡

Material Process Cutting speed Feed rate

CFK GFK
100-250 m/min 0,03 - 0,12 fz (mm/z)
aramid

CFK GFK
80-150 m/min 0,03 - 0,2 f (mm/rev.)
aramid

9
CR 100 End mills

Kevlar CR 100 end mills

0° Tool material solid carbide

WN
CR 100 HA
Surface finish
Cutting direction R

Solid carbide ultra-finest grain, diamond-coated,

without face cutting, for slotting and trimming

c
d2

d1
l2
l3
l1

Article no. 6717

d1 e10 d2 h6 l1 l2 l3 c Z
Availability
mm mm mm mm mm mm x 45°
4.000 6.00 57.00 10.00 19.40 0.10 6 ‡
6.000 6.00 65.00 15.00 29.00 0.15 8 ‡
8.000 8.00 75.00 20.00 39.00 0.15 10 ‡
10.000 10.00 80.00 25.00 40.00 0.15 12 ‡
12.000 12.00 93.00 32.00 48.00 0.15 14 ‡
16.000 16.00 108.00 34.00 60.00 0.15 14 ‡

Material Process Cutting speed Feed rate

CFRP GFRP
250-500 m/min 0.03 - 0.12 fz (mm/z)
aramid

10
 CR 100 End mills

CR 100 Kevlar end mills

0° Tool material solid carbide

WN
CR 100 HA
Surface finish
Cutting direction R

Solid carbide ultra-finest grain, diamond-coated,

with centre cutting, for slotting and trimming as well as oblique plunging

d1
d2

l2
l3
l1

Article no. 6719

d1 e10 d2 h6 l1 l2 l3 c Z
Availability
mm mm mm mm mm mm x 45°
4.000 6.00 57.00 10.00 19.40 0.32 6 ‡
6.000 6.00 65.00 15.00 29.00 0.48 8 ‡
8.000 8.00 75.00 20.00 39.00 0.64 10 ‡
10.000 10.00 80.00 25.00 40.00 0.80 12 ‡
12.000 12.00 93.00 32.00 48.00 0.96 14 ‡
16.000 16.00 108.00 34.00 60.00 1.28 14 ‡

Material Process Cutting speed Feed rate

CFRP GFRP
250-500 m/min 0.03 - 0.12 fz (mm/z)
aramid

CFRP GFRP
100-250 m/min 0.05 - 0.2 f (mm/rev.)
aramid

1
11
CR 100 End mills

CR 100 Kevlar end mills

0° Tool material solid carbide

WN
CR 100 HA
Surface finish
Cutting direction R

Solid carbide ultra-finest grain, diamond-coated,

with drill point, especially for plunging and subsequent milling

d1
d2

l4
l2
l3
l1

Article no. 6720

d1 (e10) d2 (h6) l1 l2 l3 l4 Z
Availability
mm mm mm mm mm mm
4.000 6.00 57.00 10.00 27.00 1.3 6 ‡
6.000 6.00 65.00 15.00 29.00 1.9 8 ‡
8.000 8.00 75.00 20.00 39.00 2.5 10 ‡
10.000 10.00 80.00 25.00 40.00 3.1 12 ‡
12.000 12.00 93.00 32.00 48.00 3.7 14 ‡
16.000 16.00 108.00 34.00 60.00 4.9 14 ‡

Material Process Cutting speed Feed rate

CFRP GFRP
250-500 m/min 0.03 - 0.12 fz (mm/z)
aramid

CFRP GFRP
100-250 m/min 0.05 - 0.20 f (mm/rev.)
aramid

12
 FR 100 End mills

FR 100 Kevlar end mills

0° Tool material solid carbide

WN
FR 100 HA
Surface finish
Cutting direction R R

Solid carbide ultra-finest grain, diamond-coated,

with drill centre cutting, for slotting and trimming as well as oblique plunging

d1
d2

l2
l1

Article no. 6769 6805

Code no. d1 (e10) d1 (e10) d2 (h6) l1 l1 l2 l2 Z

Availability
mm inch mm mm inch mm inch
4.000 4.000 6.000 66.00 15.00 4 ‡ ‡
4.762 4.762 3/16 4.762 63.50 2.5 15.00 37/64 4 ‡ ‡
4.763 4.762 3/16 4.762 63.50 2.5 15.80 5/8 4 ‡ ‡
6.000 6.000 6.000 70.00 20.00 4 ‡ ‡
6.350 6.350 1/4 6.350 63.50 2.5 15.00 37/64 4 ‡ ‡
6.351 6.350 1/4 6.350 63.50 2.5 19.05 3/4 4 ‡ ‡
8.000 8.000 8.000 75.00 25.00 6 ‡ ‡
9.525 9.525 3/8 9.525 76.20 3.0 18.00 45/64 6 ‡ ‡
9.526 9.525 3/8 9.525 76.20 3.0 25.40 1 6 ‡ ‡
10.000 10.000 10.000 72.00 15.00 6 ‡ ‡
12.000 12.000 12.000 83.00 20.00 6 ‡ ‡
12.700 12.700 1/2 12.700 88.90 3.5 25.40 1 8 ‡ ‡
12.701 12.707 1/2 12.700 88.90 3.5 31.75 1.25 8 ‡ ‡

Material Process Cutting speed Feed rate

CFRP GFRP
150-450 m/min 0.03 - 0.12 fz (mm/z)
aramid

CFRP GFRP
125-150 m/min 0.05 - 0.20 f (mm/rev.)
aramid

1
13
FR 100 End mills

FR 100 Kevlar end mills

0° Tool material solid carbide

WN
FR 100 HA
Surface finish
Cutting direction R R

Solid carbide ultra-finest grain, diamond-coated,

with drill point, specially for plunging and subsequent milling

d1
d2

l2
l1

Article no. 6770 6806

Code no. d1 (e10) d1 (e10) d2 (h6) l1 l1 l2 l2 Z

Availability
mm inch mm mm inch mm inch
4.000 4.000 6.000 66.00 15.00 4 ‡ ‡
4.762 4.762 3/16 4.762 63.50 2.5 15.00 37/64 4 ‡ ‡
4.763 4.762 3/16 4.762 63.50 2.5 15.80 5/8 4 ‡ ‡
6.000 6.000 6.000 70.00 20.00 4 ‡ ‡
6.350 6.350 1/4 6.350 63.50 2.5 15.00 37/64 4 ‡ ‡
6.351 6.350 1/4 6.350 63.50 2.5 19.05 3/4 4 ‡ ‡
8.000 8.000 8.000 75.00 25.00 6 ‡ ‡
9.525 9.525 3/8 9.525 76.20 3.0 18.00 45/64 6 ‡ ‡
9.526 9.525 3/8 9.525 76.20 3.0 25.40 1 6 ‡ ‡
10.000 10.000 10.000 72.00 15.00 6 ‡ ‡
12.000 12.000 12.000 83.00 20.00 6 ‡ ‡
12.700 12.700 1/2 12.700 88.90 3.5 25.40 1 8 ‡ ‡
12.701 12.707 1/2 12.700 88.90 3.5 31.75 1.25 8 ‡ ‡

Material Process Cutting speed Feed rate

CFRP GFRP
150-450 m/min 0.03 - 0.12 fz (mm/z)
aramid

CFRP GFRP
125-150 m/min 0.05 - 0.18 f (mm/rev.)
aramid

14
CNCGühro
ThreadMill
Free programming software
NEW
VERS
ION
v 2.0
for thread milling cutters and drill thread milling cutters

In order to make the machining with Guhring

thread milling cutters even more user friendly,
we have developed the intuitive “CNC Gühro
Thread Mill”.

“CNC Gühro Thread Mill” is available free-of-

charge. Simply download it from our homepage
www.guehring.de.

To the optimal CNC programme in five steps

1. Specify the thread data

Select from all current thread standards

2. Select the material

You are always referred to the optimal parameters

3. Select the tool

Technical data, drawing, machining time and video simplify selection

4. Record CNC data

Enter required milling strategy and parameters

5. Receive CNC programme with code and data sheet

Programming data (Sinumerik, Haidenhain, Fanuc, Philips, Mazatrol or Hurco)
are imported and automatically recognised
Solid carbide taps

Machine taps for ISO metric threads

~DIN Tool material solid carbide

371 R D
Surface finish
Tolerance on Ø ISO2/6H

SW
d2

d1
l2 dk
l1

Article no. 2944

d1 P d2 SW dk l1 l2
Availability
mm mm mm mm mm mm
M3 0.500 3.50 2.700 2.60 56.00 12.00 ‡
M4 0.700 4.50 3.400 3.40 63.00 14.00 ‡
M5 0.800 6.00 4.900 4.30 70.00 17.00 ‡
M6 1.000 6.00 4.900 5.10 80.00 20.00 ‡
M8 1.250 8.00 6.200 6.90 90.00 20.00 ‡
M10 1.500 10.00 8.000 8.60 100.00 24.00 ‡
M12 1.750 12.00 9.000 10.40 110.00 28.00 ‡
M16 2.000 16.00 12.000 14.10 110.00 40.00 ‡

Material Process Cutting speed

CFK GFK blind hole

10 - 20 m/min
through hole

16
 Solid carbide taps

Taps for ISO metric threads with internal cooling

DIN Tool material solid carbide

371 R N R15 C
Surface finish

≥ M5 with internal cooling Tolerance on Ø 6HX

SW P

d1
d2

l2 dk
l5
l1

Article no. 971

d1 P d2 SW dk l1 l2 l5
Availability
mm mm mm mm mm mm mm
M3 0.500 3.500 2.700 2.50 56.000 8.000 18.000 ‡
M4 0.700 4.500 3.400 3.30 63.000 10.000 21.000 ‡
M5 0.800 6.000 4.900 4.20 70.000 10.000 25.000 ‡
M6 1.000 6.000 4.900 5.00 80.000 12.000 30.000 ‡
M8 1.250 8.000 6.200 6.80 90.000 16.000 35.000 ‡
M10 1.500 10.000 8.000 8.50 100.000 18.000 39.000 ‡

Material Process Cutting speed

CFK GFK blind hole

10 - 20 m/min
through hole

1
17
Solid carbide taps

Thread milling cutters without chamfer for ISO metric threads

Tool material solid carbide

WN R 2xD TM SP
Surface finish
Cutting direction HA

d1
d2

l2 P
l1 dk
60°

Article no. 3737

D P d1 d2 dk l1 l2 Z Code no.
Availability
mm mm mm mm mm mm
M6 1.000 4.800 6.000 5.00 54.000 13.500 3 6.000 ‡
M8 1.250 6.400 8.000 6.80 62.000 18.100 3 8.000 ‡
M8 x 1 1.000 6.400 8.000 7.00 62.000 17.500 3 8.005 ‡
M10 1.500 7.950 10.000 8.50 74.000 21.800 3 10.000 ‡
M10 x 1 1.000 7.950 10.000 9.00 74.000 21.500 3 10.005 ‡
M10 x 1.25 1.250 7.950 10.000 8.80 74.000 21.900 3 10.006 ‡
M12 1.750 9.950 10.000 10.20 74.000 25.400 4 12.000 ‡
M12 x 1.5 1.500 9.950 10.000 10.50 74.000 26.300 4 12.007 ‡
M14 2.000 11.200 12.000 12.00 90.000 31.000 4 14.000 ‡
M14 x 1.5 1.500 11.200 12.000 12.50 90.000 30.800 4 14.007 ‡
M16 2.000 12.800 14.000 14.00 90.000 35.000 4 16.000 ‡
M16 x 1.5 1.500 12.800 14.000 14.50 90.000 33.800 4 16.007 ‡
M20 2.500 14.950 16.000 17.50 102.000 41.300 4 20.000 ‡
M20 x 1.5 1.500 14.950 16.000 18.50 102.000 42.800 4 20.007 ‡

Material Process Cutting speed Feed rate

CFK GFK blind hole

50-80 m/min 0.01 - 0.10 fz (mm/z)
through hole

The appropriate CNC programme with code and data sheet for the tool you can get for free with the free programming software
CNC Gühro Thread Mill.

18
 Solid carbide taps

Micro thread milling cutters

Tool material solid carbide

WN R 3xD MTM3
SP Surface finish
Cutting direction HA

D
l5

d1
d2

l2
P
l1
60°

Article no. 4226

D P d1 d2 l1 l2 l5 Z Code no.
Availability
mm mm mm mm mm mm
M1.6 0.350 1.200 3.000 39.000 1.100 4.800 3 1.600 ‡
M1.8 0.350 1.400 3.000 39.000 1.100 5.400 3 1.800 ‡
M2 0.400 1.550 3.000 39.000 1.200 6.000 4 2.000 ‡
M2.5 0.450 1.950 3.000 39.000 1.400 7.500 4 2.500 ‡
M3 0.500 2.400 6.000 58.000 1.500 9.500 4 3.000 ‡
M3.5 0.600 2.800 6.000 58.000 1.800 11.000 4 3.500 ‡
M4 0.700 3.200 6.000 58.000 2.100 12.500 4 4.000 ‡
M5 0.800 4.000 6.000 58.000 2.400 16.000 4 5.000 ‡
M6 1.000 4.800 6.000 58.000 3.000 20.000 4 6.000 ‡
M8 1.250 5.950 6.000 58.000 3.800 24.000 4 8.000 ‡
M10 1.500 7.800 8.000 73.000 4.500 33.000 4 10.000 ‡
M12 1.750 9.000 10.000 84.000 5.300 38.000 4 12.000 ‡
M16 2.000 11.800 12.000 84.000 6.000 35.000 5 16.000 ‡

Material Process Cutting speed Feed rate

CFK GFK blind hole

50-80 m/min 0.01 - 0.10 fz (mm/z)
through hole

The appropriate CNC programme with code and data sheet for the tool you can get for free with the free programming software
CNC Gühro Thread Mill.

1
19
PCD Drills

90º PCD drills

Tool material PCD

3xD m7
90° Cutting direction R

l1

°
90
d2

d1
l3 l2

d1 d1 d2 h6 l1 l2 l3
Material number
mm inch mm mm mm mm
2.700 4.00 60.00 18.00 28.00 303 209 684
3.000 4.00 60.00 18.00 28.00 303 209 685
3.250 4.00 60.00 18.00 28.00 303 420 038
3.572 9/64 4.00 60.00 18.00 28.00 303 209 686
4.000 5.00 60.00 20.00 28.00 303 209 802
4.170 5.00 75.00 25.00 28.00 303 420 039
4.762 3/16 5.00 75.00 25.00 28.00 303 209 803
4.830 5.00 75.00 25.00 28.00 303 420 040
5.000 6.00 75.00 25.00 36.00 303 209 804
6.000 8.00 75.00 30.00 36.00 303 209 805
6.350 1/4 8.00 75.00 35.00 36.00 303 209 806
7.937 5/16 10.00 75.00 30.00 40.00 303 209 807
8.000 10.00 75.00 30.00 40.00 303 209 808
9.525 3/8 10.00 100.00 50.00 40.00 303 209 809
10.000 12.00 125.00 50.00 45.00 303 209 810
12.000 14.00 125.00 60.00 45.00 303 209 811
12.700 1/2 14.00 150.00 65.00 45.00 303 209 812

Material Process Cutting speed Feed rate

CFRP GFRP
75-200 m/min 0.05 - 0.2 f (mm/rev.)
aramid

20
 PCD Drills

120º PCD drills

Tool material PCD

3xD m7
120° Cutting direction R

l1

°0
12

d1
d2

l3 l2

d1 d1 d2 h6 l1 l2 l3
Material number
mm inch mm mm mm mm
2.700 4.00 60.00 18.00 28.00 303 209 813
3.000 4.00 60.00 18.00 28.00 303 209 814
3.250 4.00 60.00 18.00 28.00 303 420 041
3.572 9/64 4.00 60.00 18.00 28.00 303 209 815
4.000 5.00 60.00 20.00 28.00 303 209 816
4.170 5.00 75.00 25.00 28.00 303 420 047
4.762 3/16 5.00 75.00 25.00 28.00 303 209 817
4.830 5.00 75.00 25.00 28.00 303 420 048
5.000 6.00 75.00 25.00 36.00 303 209 818
6.000 8.00 75.00 30.00 36.00 303 209 819
6.350 1/4 8.00 75.00 35.00 36.00 303 209 820
7.937 5/16 10.00 75.00 30.00 40.00 303 209 821
8.000 10.00 75.00 30.00 40.00 303 209 822
9.525 3/8 10.00 100.00 50.00 40.00 303 209 823
10.000 12.00 125.00 50.00 45.00 303 209 824
12.000 14.00 125.00 60.00 45.00 303 209 825
12.700 1/2 14.00 150.00 65.00 45.00 303 209 826

Material Process Cutting speed Feed rate

CFRP GFRP
100-250 m/min 0.05 - 0.20 f (mm/rev.)
aramid

2
21
PCD Slot drills

PCD slot drills Z=2

2-4° Tool material PCD

R ±0,05
WN HA
Surface finish
Cutting direction R

d3
d2

d1
l2
l3
l1

Article no. 5492

Code no. d1 d1 d2 h6 d3 l1 l2 l3 r Z
Availability
mm mm mm mm mm mm mm
4.000 4.000 ± 0.02 6.00 3.70 51 6.0 14.0 0.1 2 ‡
5.000 5.000 ± 0.02 6.00 4.70 51 8.0 14.5 0.1 2 ‡
6.000 6.000 ± 0.02 6.00 5.70 57 8.0 20.0 0.1 2 ‡
8.000 8.000 ± 0.02 8.00 7.40 63 8.0 26.0 0.1 2 ‡
8.001 8.000 ± 0.02 8.00 7.40 63 12.0 26.0 0.1 2 ‡
10.000 10.000 ± 0.02 10.00 9.40 72 8.0 30.0 0.1 2 ‡
10.001 10.000 ± 0.02 10.00 9.40 72 16.0 30.0 0.1 2 ‡
12.000 12.000 ± 0.02 12.00 11.20 83 8.0 36.0 0.1 2 ‡
12.001 12.000 ± 0.02 12.00 11.20 83 16.0 36.0 0.1 2 ‡
14.000 14.000 ± 0.02 14.00 13.00 83 8.0 36.0 0.1 2 ‡
14.001 14.000 ± 0.02 14.00 13.00 83 16.0 36.0 0.1 2 ‡
16.000 16.000 ± 0.02 16.00 15.00 100 12.0 50.0 0.1 2 ‡
16.001 16.000 ± 0.02 16.00 15.00 100 20.0 50.0 0.1 2 ‡
18.000 18.000 ± 0.02 18.00 17.00 100 12.0 50.0 0.1 2 ‡
18.001 18.000 ± 0.02 18.00 17.00 100 20.0 50.0 0.1 2 ‡
20.000 20.000 ± 0.02 20.00 19.00 100 12.0 48.0 0.1 2 ‡
20.001 20.000 ± 0.02 20.00 19.00 100 20.0 48.0 0.1 2 ‡

Material Process Cutting speed Feed rate

CFRP GFRP
150-450 m/min 0.03 - 0.12 fz (mm/z)
aramid

CFRP GFRP
125-150 m/min 0.05 - 0.18 f (mm/rev.)
aramid

22
 PCD Slot drills

PCD slot drills Z=2

2-4° Tool material PCD

R ±0,05
WN Cyl
Surface finish
Cutting direction R

d3
d2

d1
l2
l3
l1

Article no. 5493

Code no. d1 d1 d2 h6 d3 l1 l2 l3 r Z
Availability
mm mm mm mm mm mm mm
4.000 4.000 ± 0.02 6.00 3.70 70 6.0 14.0 0.1 2 ‡
5.000 5.000 ± 0.02 6.00 4.70 70 8.0 14.5 0.1 2 ‡
6.000 6.000 ± 0.02 6.00 5.70 75 8.0 20.0 0.1 2 ‡
8.000 8.000 ± 0.02 8.00 7.40 100 8.0 26.0 0.1 2 ‡
8.001 8.000 ± 0.02 8.00 7.40 100 12.0 26.0 0.1 2 ‡
10.000 10.000 ± 0.02 10.00 9.40 100 8.0 30.0 0.1 2 ‡
10.001 10.000 ± 0.02 10.00 9.40 100 16.0 30.0 0.1 2 ‡
12.000 12.000 ± 0.02 12.00 11.20 100 8.0 36.0 0.1 2 ‡
12.001 12.000 ± 0.02 12.00 11.20 100 16.0 36.0 0.1 2 ‡
14.000 14.000 ± 0.02 14.00 13.00 100 8.0 36.0 0.1 2 ‡
14.001 14.000 ± 0.02 14.00 13.00 100 16.0 36.0 0.1 2 ‡
16.000 16.000 ± 0.02 16.00 15.00 150 12.0 50.0 0.1 2 ‡
16.001 16.000 ± 0.02 16.00 15.00 150 20.0 50.0 0.1 2 ‡
18.000 18.000 ± 0.02 18.00 17.00 125 12.0 50.0 0.1 2 ‡
18.001 18.000 ± 0.02 18.00 17.00 125 20.0 50.0 0.1 2 ‡
18.002 18.000 ± 0.02 18.00 17.00 150 12.0 50.0 0.1 2 ‡
18.003 18.000 ± 0.02 18.00 17.00 150 20.0 50.0 0.1 2 ‡
20.000 20.000 ± 0.02 20.00 19.00 150 12.0 48.0 0.1 2 ‡
20.001 20.000 ± 0.02 20.00 19.00 150 20.0 48.0 0.1 2 ‡

Material Process Cutting speed Feed rate

CFK GFK
150-450 m/min 0.03 - 0.12 fz (mm/z)
aramid

CFK GFK
125-150 m/min 0.05 - 0.18 f (mm/rev.)
aramid

2
23
PCD Slot drills

PCD slot drills Z=3

4° Tool material PCD

R ±0,05
WN HA
Surface finish
Cutting direction R

d3
d2

d1
l2
l3
l1

Article no. 5495

Code no. d1 d1 d2 h6 d3 l1 l2 l3 r Z
Availability
mm mm mm mm mm mm mm
14.000 14.000 ± 0.02 14.00 13.00 83 8.0 38.0 0.1 3 ‡
14.001 14.000 ± 0.02 14.00 13.00 83 16.0 38.0 0.1 3 ‡
16.000 16.000 ± 0.02 16.00 15.00 100 12.0 52.0 0.1 3 ‡
16.001 16.000 ± 0.02 16.00 15.00 100 20.0 52.0 0.1 3 ‡
18.000 18.000 ± 0.02 18.00 17.00 100 12.0 52.0 0.1 3 ‡
18.001 18.000 ± 0.02 18.00 17.00 100 20.0 52.0 0.1 3 ‡
20.000 20.000 ± 0.02 20.00 19.00 100 12.0 50.0 0.1 3 ‡
20.001 20.000 ± 0.02 20.00 19.00 100 20.0 50.0 0.1 3 ‡

Material Process Cutting speed Feed rate

CFK GFK
150-450 m/min 0.03 - 0.12 fz (mm/z)
aramid

CFK GFK
125-150 m/min 0.05 - 0.18 f (mm/rev.)
aramid

24
 PCD Slot drills

PCD Slot drills Z=3

4° Tool material PCD

R ±0,05
WN Cyl
Surface finish
Cutting direction R

d3
d2

d1
l2
l3
l1

Article no. 5496

Code no. d1 d1 d2 h6 d3 l1 l2 l3 r Z
Availability
mm mm mm mm mm mm mm
14.000 14.000 ± 0.02 14.00 13.00 100 8.0 38.0 0.1 3 ‡
14.001 14.000 ± 0.02 14.00 13.00 100 16.0 38.0 0.1 3 ‡
16.000 16.000 ± 0.02 16.00 15.00 150 12.0 52.0 0.1 3 ‡
16.001 16.000 ± 0.02 16.00 15.00 150 20.0 52.0 0.1 3 ‡
18.000 18.000 ± 0.02 18.00 17.00 150 12.0 52.0 0.1 3 ‡
18.001 18.000 ± 0.02 18.00 17.00 150 20.0 52.0 0.1 3 ‡
20.000 20.000 ± 0.02 20.00 19.00 150 12.0 50.0 0.1 3 ‡
20.001 20.000 ± 0.02 20.00 19.00 150 20.0 50.0 0.1 3 ‡

Material Process Cutting speed Feed rate

CFK GFK
150-450 m/min 0.03 - 0.12 fz (mm/z)
aramid

CFK GFK
125-150 m/min 0.05 - 0.18 f (mm/rev.)
aramid

2
25
PKD End mills

PCD End mills Z=4

0° Tool material PCD

WN HA
Surface finish
Cutting direction R

d3
d2

d1
l2
l3
l1

d1 d1 d2 h6 d3 l1 l2 l3 c Z
Material number
mm inch mm mm mm mm mm mm x 45°
8.000 8.00 7.40 75.00 19.50 38.50 0.20 4 303 206 512
9.525 3/8 10.00 8.92 80.00 19.50 39.26 0.20 4 303 206 513
10.000 10.00 9.40 80.00 19.50 39.50 0.20 4 303 206 514
12.000 12.00 11.40 88.00 19.50 42.50 0.20 4 303 206 515
12.700 1/2 14.00 12.10 88.00 19.50 41.85 0.20 4 303 211 229

12.700 1/2 14.00 11.10 88.00 19.50 41.35 0.20 2+1 303 211 230

Material Process Cutting speed Feed rate

CFK GFK
150-500 m/min 0.03 - 0.12 fz (mm/z)
aramid

CFK GFK
125-200 m/min 0.05 - 0.20 f (mm/rev.)
aramid

26
 PCD Compression milling cutters

PCD Compression milling cutters Z=3

10° Tool material PCD

WN HA
Cutting direction R

d3
d2

d1
l2
l3
l1

d1 d1 d2 h6 d3 l1 l2 l3 r
Material number
mm inch mm mm mm mm mm mm
12.700 1/2 12.00 11.30 88.00 28.00 41.49 0.10 303 211 231
14.000 14.00 12.60 88.00 28.00 40.19 0.10 303 211 257
16.000 16.00 14.60 91.00 28.00 40.19 0.10 303 211 258

Material Process Cutting speed Feed rate

CFRP GFRP
150-500 m/min 0.03 - 0.12 fz (mm/z)
aramid

2
27
 Technical Section

Tapping size holes for thread cutting / thread milling

Standard ISO metric threads ISO metric fine threads UNC threads
DIN 13 DIN 13 ASME B1.1
Nom. Pitch Tapping Core diameter Nom. Pitch Tapping Core diameter Nom. Pitch Tapping Core diameter Nom. Thread Tapping Core diameter
Ø P size of int. thread Ø x P size of int. thread Ø x P size of int. thread Ø size of int. thread
hole Ø 6H* hole Ø 6H hole Ø 6H hole Ø 2B
DIN 336 min. max. DIN 336 min. max. DIN 336 min. max. per DIN 336 min. max.
mm mm mm mm mm mm mm mm mm mm mm mm inch mm mm mm
M1 0.25 0.75 0.729 0.785 M 2.5 x 0.35 2.15 2.121 2.221 M 22 x 1.00 21.00 20.917 21.153 No. 1 - 64 1.55 1.425 1.580
M 1.1 0.25 0.85 0.829 0.885 M 3.0 x 0.35 2.65 2.621 2.721 M 22 x 1.50 20.50 20.376 20.676 No. 2 - 56 1.85 1.694 1.872
M 1.2 0.25 0.95 0.929 0.985 M 3.5 x 0.35 3.15 3.121 3.221 M 22 x 2.00 20.00 19.835 20.210 No. 3 - 48 2.10 1.941 2.146
M 1.4 0.30 1.10 1.075 1.142 M 4.0 x 0.50 3.50 3.459 3.599 M 24 x 1.00 23.00 22.917 23.153 No. 4 - 40 2.35 2.157 2.385
M 1.6 0.35 1.25 1.221 1.321 M 4.5 x 0.50 4.00 3.959 4.099 M 24 x 1.50 22.50 22.376 22.676 No. 5 - 40 2.65 2.487 2.698
M 1.8 0.35 1.45 1.421 1.521 M 5.0 x 0.50 4.50 4.459 4.599 M 24 x 2.00 22.00 21.835 22.210 No. 6 - 32 2.85 2.642 2.896
M2 0.40 1.60 1.567 1.679 M 5.5 x 0.50 5.00 4.959 5.099 M 25 x 1.00 24.00 23.917 24.153 No. 8 - 32 3.50 3.302 3.531
M 2.2 0.45 1.75 1.713 1.838 M 6.0 x 0.75 5.20 5.188 5.378 M 25 x 1.50 23.50 23.376 23.676 No. 10 - 24 3.90 3.683 3.937
M 2.5 0.45 2.05 2.013 2.138 M 7.0 x 0.75 6.20 6.188 6.378 M 25 x 2.00 23.00 22.835 23.210 No. 12 - 24 4.50 4.343 4.597
M3 0.50 2.50 2.459 2.599 M 8.0 x 0.50 7.50 7.459 7.599 M 27 x 1.00 26.00 25.917 26.153 1/4 - 20 5.10 4.978 5.258
M 3.5 0.60 2.90 2.850 3.010 M 8.0 x 0.75 7.20 7.188 7.378 M 27 x 1.50 25.50 25.376 25.676 5/16 - 18 6.60 6.401 6.731
M4 0.70 3.30 3.242 3.422 M 8.0 x 1.00 7.00 6.917 7.153 M 27 x 2.00 25.00 24.835 25.210 3/8 - 16 8.00 7.798 8.153
M 4.5 0.75 3.70 3.688 3.878 M 9.0 x 0.75 8.20 8.188 8.378 M 28 x 1.00 27.00 26.917 27.153 7/16 - 14 9.40 9.144 9.550
M5 0.80 4.20 4.134 4.334 M 9.0 x 1.00 8.00 7.917 8.153 M 28 x 1.50 26.50 26.376 26.676 1/2 - 13 10.80 10.592 11.024
M6 1.00 5.00 4.917 5.153 M 10 x 0.75 9.20 9.188 9.378 M 28 x 2.00 26.00 25.835 26.210 9/16 - 12 12.20 11.989 12.446
M7 1.00 6.00 5.917 6.153 M 10 x 1.00 9.00 8.917 9.153 M 30 x 1.00 29.00 28.917 29.153 5/8 - 11 13.50 13.386 13.868
M8 1.25 6.80 6.647 6.912 M 10 x 1.25 8.80 8.647 8.912 M 30 x 1.50 28.50 28.376 28.676 3/4 - 10 16.50 16.307 16.840
M9 1.25 7.80 7.647 7.912 M 11 x 0.75 10.20 10.188 10.378 M 30 x 2.00 28.00 27.835 28.210 7/8 - 9 19.50 19.177 19.761
M 10 1.50 8.50 8.376 8.676 M 11 x 1.00 10.00 9.917 10.153 M 30 x 3.00 27.00 26.752 27.252 1 - 8 22.25 21.971 22.606
M 11 1.50 9.50 9.376 9.676 M 12 x 1.00 11.00 10.917 11.153 M 32 x 1.50 30.50 30.376 30.676 1 1/8 - 7 25.00 24.638 25.349
M 12 1.75 10.20 10.106 10.441 M 12 x 1.25 10.80 10.647 10.912 M 32 x 2.00 30.00 29.835 30.210 1 1/4 - 7 28.00 27.813 28.524
M 14 2.00 12.00 11.835 12.210 M 12 x 1.50 10.50 10.376 10.676 M 33 x 1.50 31.50 31.376 31.676 1 3/8 - 6 30.75 30.353 31.115
M 16 2.00 14.00 13.835 14.210 M 14 x 1.00 13.00 12.917 13.153 M 33 x 2.00 31.00 30.835 31.210 1 1/2 - 6 34.00 33.528 34.290
M 18 2.50 15.50 15.294 15.744 M 14 x 1.25 12.80 12.647 12.912 M 33 x 3.00 30.00 29.752 30.252 1 3/4 - 5 39.50 38.938 39.802
M 20 2.50 17.50 17.294 17.744 M 14 x 1.50 12.50 12.376 12.676 M 35 x 1.50 33.50 33.376 33.676 2 - 4.5 45.00 44.679 45.593
M 22 2.50 19.50 19.294 19.744 M 15 x 1.00 14.00 13.917 14.153 M 36 x 1.50 34.50 34.376 34.676
M 24 3.00 21.00 20.752 21.252 M 15 x 1.50 13.50 13.376 13.676
M 27 3.00 24.00 23.752 24.252 M 16 x 1.00 15.00 14.917 15.153 * M 1.1 up to M 1.4 tapping size hole of internal thread 5H

M 30 3.50 26.50 26.211 26.771 M 16 x 1.25 14.80 14.647 14.912

M 33 3.50 29.50 29.211 29.771 M 16 x 1.50 14.50 14.376 14.676
M 36 4.00 32.00 31.670 32.270 M 17 x 1.00 16.00 15.917 16.153
M 39 4.00 35.00 34.670 35.270 M 17 x 1.50 15.50 15.376 15.676
M 42 4.50 37.50 37.129 37.799 M 18 x 1.00 17.00 16.917 17.153
M 45 4.50 40.50 40.129 40.799 M 18 x 1.50 16.50 16.376 16.676
M 48 5.00 43.00 42.587 43.297 M 20 x 1.00 19.00 18.917 19.153
M 52 5.00 47.00 46.587 47.297 M 20 x 1.50 18.50 18.376 18.676
M 56 5.50 50.50 50.046 50.796 M 20 x 2.00 18.00 17.835 18.210

MJ threads UNJC threads UNJF threads

DIN ISO 5855 ISO 3161 ISO 3161
Nom. x Pitch Tapping Core diameter Nom. Thread Tapping Core diameter Nom. Thread Tapping Core diameter
Ø P size of int. thread 5H* Ø size of int. thread 3B Ø size of int. thread 3B
hole Ø hole Ø hole Ø
min. max. per min. max. per min. max.
mm mm mm mm inch mm mm mm inch mm mm mm
MJ 3 x 0.50 2.60 2.513 2.653 No. 6 - 32 2.85 2.733 2.939 No. 6 - 40 3.00 2.888 3.053
MJ 4 x 0.70 3.40 3.318 3.498 No. 8 - 32 3.55 3.393 3.599 No. 8 - 36 3.60 3.480 3.663
MJ 5 x 0.80 4.30 4.221 4.421 No. 10 - 24 4.00 3.795 4.064 No. 10 - 32 4.20 4.054 4.255
MJ 6 x 0.50 5.55 5.513 5.625 No. 12 - 24 4.60 4.455 4.704 No. 12 - 28 4.75 4.602 4.816
MJ 6 x 0.75 5.35 5.269 5.419 1/ 4 - 20 5.30 5.113 5.387 1/4 - 28 5.60 5.466 5.662
MJ 6 x 1.00 5.10 5.026 5.216 5/16 - 18 6.75 6.563 6.833 5/16 - 24 7.00 6.906 7.109
MJ 8 x 0.50 7.55 7.513 7.625 3/ 8 - 16 8.20 7.978 8.255 3/8 - 24 8.60 8.494 8.679
MJ 8 x 0.75 7.35 7.269 7.419 7/16 - 14 9.60 9.346 9.639 7/16 - 20 10.00 9.876 10.084
MJ 8 x 1.00 7.10 7.026 7.216 1/ 2 - 13 11.00 10.798 11.095 1/2 - 20 11.60 11.463 11.661
MJ 8 x 1.25 6.90 6.782 6.994 9/16 - 12 12.40 12.228 12.482 9/16 - 18 13.00 12.913 13.122
MJ 10 x 1.00 9.10 9.026 9.216 5/8 - 11 13.80 13.627 13.904 5/8 - 18 14.60 14.501 14.702
MJ 10 x 1.25 8.90 8.782 8.994
MJ 10 x 1.50 8.60 8.539 8.775 * MJ3 x 0.50 up to MJ 5 x 0.80 tapping size hole of internal thread 6H

MJ 12 x 1.75 10.40 10.295 10.560

MJ 16 x 2.00 14.20 14.051 14.351

28
 Technical Section

Tapping size holes for thread cutting / thread milling

UNF threads BSP threads Steel armoured conduit threads
BSW threads BS84
ASME B1.1 (DIN-ISO 228-1) to DIN 40430
Nom. Thre- Tapping Core diameter Nom. Thre- Tapping Core diameter Nom. Thre- Tapping Core diameter Nom. Thre- Tapping Core diameter
Ø ad size of int. thread Ø ad size of int. thread Ø ad size of int. thread Ø ad size of int. thread
hole Ø 2B hole Ø hole Ø hole Ø
per DIN 336 min. max. per min. max. per DIN 336 min. max. per min. max.
mm mm
inch mm mm mm inch mm mm inch mm mm mm inch mm mm
No. 1 - 72 1.55 1.473 1.610 W 1/16 60 1.20 1.045 1.230 G 1/16 28 6.80 6.561 6.843 Pg 7 20 11.40 11.280 11.430
No. 2 - 64 1.85 1.755 1.910 W 3/32 48 1.80 1.704 1.912 G 1/8 28 8.80 8.566 8.848 Pg 9 18 14.00 13.860 14.010
No. 3 - 56 2.15 2.024 2.197 W 1/8 40 2.50 2.362 2.591 G 1/4 19 11.80 11.445 11.890 Pg 11 18 17.30 17.260 17.410
No. 4 - 48 2.40 2.271 2.459 W 5/32 32 3.20 2.952 3.214 G 3/8 19 15.25 14.950 15.395 Pg 13.5 18 19.00 19.060 19.210
No. 5 - 44 2.70 2.550 2.741 W 3/16 24 3.60 3.407 3.745 G 1/2 14 19.00 18.631 19.172 Pg 16 18 21.30 21.160 21.310
No. 6 - 40 2.95 2.819 3.023 W 7/32 24 4.50 4.201 4.539 G 5/8 14 21.00 20.587 21.128 Pg 21 16 26.90 26.780 27.030
No. 8 - 36 3.50 3.404 3.607 W 1/4 20 5.10 4.724 5.156 G 3/4 14 24.50 24.117 24.658 Pg 29 16 35.50 35.480 35.730
No. 10 - 32 4.10 3.962 4.166 W 5/16 18 6.50 6.130 6.590 G 7/8 14 28.25 27.877 28.418 Pg 36 16 45.50 45.480 45.730
No. 12 - 28 4.60 4.496 4.724 W 3/8 16 7.90 7.492 7.987 G1 11 30.75 30.291 30.931 Pg 42 16 52.50 52.480 52.730
1/4 - 28 5.50 5.359 5.588 W 7/16 14 9.20 8.789 9.330 G 11/8 11 35.50 34.939 35.579 Pg 48 16 57.80 57.780 58.030
5/16 - 24 6.90 6.782 7.036 W 1/2 12 10.50 9.989 10.591 G 11/4 11 39.50 38.952 39.592
3/8 - 24 8.50 8.382 8.636 W 9/16 12 12.00 11.577 12.179 G 11/2 11 45.25 44.845 45.485
7/16 - 20 9.90 9.728 10.033 W 5/8 11 13.50 12.918 13.558 G 13/4 11 51.00 50.788 51.428
1/2 - 20 11.50 11.328 11.608 W 3/4 10 16.25 15.797 16.483 G2 11 57.00 56.656 57.296
9/16 - 18 12.90 12.751 13.081 W 7/8 9 19.25 18.611 19.353
5/8 - 18 14.50 14.351 14.681 W1 8 22.00 21.334 22.147
3/4 - 16 17.50 17.323 17.678 W 1 1/8 7 24.50 23.928 24.832
7/8 - 14 20.40 20.269 20.650 W 1 1/4 7 27.75 27.103 28.007
1 - 12 23.25 23.114 23.571 W 1 3/8 6 30.50 29.504 30.528
1 1/8 - 12 26.50 26.289 26.746 W 1 1/2 6 33.50 32.679 33.703
1 1/4 - 12 29.50 29.464 29.921 W 1 5/8 5 35.50 34.769 35.963
1 3/8 - 12 32.75 32.639 33.096 W 1 3/4 5 39.00 37.944 39.138
1 1/2 - 12 36.00 35.814 36.271 W2 4.5 44.50 43.571 44.877

NPT ANSI B 2.1

American tapered pipe thread 1:16
Version A Version B Nom. Thread Tapp. size Tapp. size hole Cutting depth Cutting depth
(avoid if possible) Ø per hole Ø ET BT (min)
Ø conical (B)
cylindrical (A)
inch d1 D1 mm mm
1/16 - 27 6.15 6.39 9.29 10.7
d1 D1
1/8 - 27 8.40 8.74 9.32 10.8
1/4 - 18 11.10 11.36 13.52 15.6
3/8 - 18 14.30 14.80 13.83 16.0
1:16

1/2
ET

- 14 17.90 18.32 18.07 20.8

BT
BT

3/4 - 14 23.30 23.67 18.55 21.3

1 - 11,5 29.00 29.69 22.29 25.6
1 1/4 - 11,5 37.70 38.45 22.80 26.1
d1 1 1/2 - 11,5 43.70 44.52 22.80 26.1
2 - 11,5 55.60 56.56 23.20 26.5
2 1/2 - 8 66.30 67.62 31.75 36.3
3 - 8 82.30 83.52 33.74 38.5

Metric/metric fine EG-threads (EG M14 x 1.25) UNC (UNC-STI) EG-threads UNF (UNF-STI) EG-threads
for wire thread inserts DIN 8140 for wire thread inserts ASME B18.29.1 for wire thread inserts ASME B18.29.1
Nom. x Pitch Tapping Core diameter Nom. Thread Tapping Core diameter Nom. Thread Tapping Core diameter
Ø P size of int. thread Ø size of int. thread Ø size of int. thread
hole Ø hole Ø hole Ø
min. max. per min. max. per min. max.
mm mm mm mm inch mm mm mm inch mm mm mm
EG M 4 x 0.70 4.20 4.152 4.292 EG No. 6 - 32 3.80 3.678 3.879 EG No. 6 - 40 3.70 3.644 3.818
EG M 5 x 0.80 5.25 5.174 5.334 EG No. 8 - 32 4.40 4.338 4.524 EG No. 8 - 36 4.40 4.321 4.498
EG M 6 x 1.00 6.30 6.217 6.407 EG No. 10 - 24 5.20 5.055 5.283 EG No. 10 - 32 5.10 4.999 5.184
EG M 8 x 1.25 8.40 8.271 8.483 EG No. 12 - 24 5.80 5.715 5.944 EG No. 12 - 28 5.70 5.682 5.809
EG M10 x 1.50 10.50 10.324 10.560 EG 1/4 - 20 6.70 6.624 6.868 EG 1/4 - 28 6.60 6.546 6.721
EG M12 x 1.75 12.50 12.379 12.644 EG 5/16 - 18 8.40 8.242 8.489 EG 5/16 - 24 8.25 8.166 8.352
EG M14 x 1.25 14.40 14.271 14.483 EG 3/8 - 16 10.00 9.868 10.127 EG 3/8 - 24 9.80 9.754 9.931
EG M16 x 2.00 16.50 16.433 16.733 EG 7/16 - 14 11.60 11.506 11.783 EG 7/16 - 20 11.50 11.389 11.585
EG 1/2 - 13 13.30 13.122 13.393 EG 1/2 - 20 13.10 12.974 13.172
EG 9/16 - 12 14.90 14.747 15.032 EG 9/16 - 18 14.70 14.592 14.798
EG 5/8 - 11 16.50 16.375 16.673 EG 5/8 - 18 16.25 16.180 16.386

2
29
Technical Section

Difference between taps/fluteless taps and thread milling cutters

Taps/fluteless taps Thread milling cutter

P = pitch T = pitch

The red lines show the pitch angle of the thread that is The red lines show that the tool does not possess a
ground into the tool. This means the pitch is cut into the pitch angle. The pitch is produced by the Z-axis of a
workpiece by the tool. CNC machine.

Creation of the thread with thread milling

CNC-axes CNC-axes

Y Y

X X
Z

Thread profile without axial feed (Z-axis) of the machine. Through the additional programming of the Z-axis the
A groove profile is created without pitch. A functioning necessary pitch is produced.
thread is not created.

Note:
Due to diagonal milling in the pitch angle (Z-axis) the thread profile of the tool is transferred onto the component
distorted.
The more the milling cutter diameter (80 % of nom. Ø) approaches the nominal thread diameter and the higher the
thread pitch the more pronounced the profile distortion is.

30
 Technical Section

Differentiating between two milling processes

Reverse rotation milling Synchronous milling

clockwise, with G02 anticlockwise, with G03

Reverse rotation milling is preferentially applied Synchronous milling is applied with thread depths
for the machining of harder materials or to remedy smaller than 1.5xD.
taper threads. Advantage: A better surface finish is achieved.

Thread production with one tool

Right-hand thread Left-hand thread

Reverse rotation milling Reverse rotation milling

Tool rotates clockwise from top to bottom Tool rotates clockwise from bottom to top

Right-hand thread Left-hand thread

Synchronous milling Synchronous milling

Tool rotates clockwise from bottom to top Tool rotates clockwise from top to bottom

3
31
Technical Section

Thread milling programming

Program specifications

Thread milling functions

G00 Rapid movement G90 Absolute dimension

G01 Feed G91 Incremental dimension
G02 Circular interpolation (clockwise) M03 Spindle on (clockwise rotation)
G03 Circular interpolation (anti-clockwise) M05 Spindle stop
G17 Layer selection x-y axis M08 Coolant on
G18 Layer selection z-x axis X Axis
G19 Layer selection y-z axis Y Axis
G40 Cancel tool correction Z Axis
G41 Tool path correction (left of contour) I Thread pitch parallel to X-axis
G42 Tool path correction (right of contour) J Thread pitch parallel to Y-axis
G43 Tool length compensation (call-up) S Spindle speed
G49 Tool length compensation (deselect) F Feed
G54 Work offset

CNC internal thread milling

1. Moving to start position

(milling cutter) (milling cutter)
2. Moving to thread depth in bore external path vf centre point path vm
3. 180° descending loop to contour
4. 360° full circular movement of thread milling cutter d
5. 180° exit loop to centre of bore D

6. Rapid movement from bore to start position

entry cycle 180°

(always half feed rate)

Formula of calculation
Y+ Y+ Y+
. .n
X+ X+ X+ vc = d
1000
.
n = vc .1000
d
vf = n . z . fz
vm = vf . (D - d)
D
vb = n . fb
vc = cutting speed
vf = contour feed
vm = centre point path feed
n = revolutions
z = number of teeth
fz = feed per tooth
fb = feed per drill per revolution*
vb = drill feed rate*
D = Ø nom. of thread [mm]
d = milling cutter nom. Ø [mm]
* for drill/thread milling
1 2 3 4 5 6

32
 Technical Section

Thread milling programming

Programming process for micro-thread milling (right-hand thread in reverse rotation)

180° 180°
Starting point Tool starting position Thread milling End position
entry cycle withdrawal cycle

Y+ Y+ Y+

X+ X+ X+

Possibilities to reduce radial forces

To reduce radial forces cut distribution can be undertaken:

Advantage: Disadvantage:
- for larger thread depths - increased tool wear
- counteracts taper threads - longer production time
- for unstable clamping conditions

Axial distribution of cut Radial distribution of cut

2/3 1/3

1st step
reverse rotation
milling

2nd step
reverse rotation
milling

1st step 2nd step 1st step 2nd step

3
33
Technical Section

Practical application of thread milling cutters

1.) Tool clamping:

good concentricity is important, therefore clamping as short and rigid as possible

2.) Enter tool data in machine memory

1.) Tool length from the front face, take drill/thread milling cutters
(DTMC) rom point.
2.) Measure tool radius with tool pre-setting equipment. General rule:
measured radius - 0.022 x pitch provides the input value in machine memory.

3.) Input of CNC program in control

(preferably integrated as sub-program at corresponding positions)
a.) Call-up of a self-controlling cycle (procedures should be known)
b.) Integration of data file from our threadmill-software (DIN or Haidenhain).

4.) Trial run over workpiece

a) Tool length dimension in memory extending by an approximate value
dependent on contact length (i.e. 30 mm) or offset zero point.
b) Run program in single set, visual check of travel path.
c) Allow program to run in automatic mode.

Attention:
With controls where it is not definitely clear what milling path is assigned it
it must be clarified if the feed is positioned on the external path vf or at the
centre path v m. As a rule we specify the milling centre point path vm.

5.) Application in workpiece

Re-set the tool extension or the zero point. Then allow the program to run in the workpiece
the feed regulation must be 100 % selected. Should the thread not be true to gauge,
the tool radius requires correction in the tool memory:
Example:
• thread too tight: Radius correction – input
• thread too large: Radius correction + input

34
 Technical Section

Notes

3
35
 g
Millin

g/
millin
/ T h read pping
ing ta
Tapp Fluteless
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Drillin

ing
te rsink
Coun

ing
Ream

PCD

ices
Ser v

te m s
ula r sys
Mod

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Spec

ms
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G roovin

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