Page 286 - Hartner

Single-fluted gun drills with solid carbide head E 80

suitable for almost every material, from Ø 2 - 40.0 mm,
max. total length 3000 mm

To ask for or to order Hartner single-fluted gun drills E 80 with solid carbide head especially
suited to your application, please complete the fax inquiry.
From Ø 6.0…20.0 mm we can fit PCD or CBN cutting edges on request.
With AlSi-alloys for example, tool life subsequently increases multi-fold.

For certain materials a coating is required, as the successful application of gun drills with a bright surface finish cannot be guaranteed.
For coating definitions see Hartnerguide in the tecnical part.
T
TiN A TiAlN TiCN F FIRE MolyGlide A AlTiN nanoA TiAlSiN
The dimensions required to calculate the length
for conventional machine tools * max. flute length per tool 40 x D, for
larger drilling depths apply two tools. (i.e.
Ø 10 x 450 and Ø 9,95 x 850 mm)
head length
workpiece
driver
G
G
D G
re-grind
D 6 ~ 4 x D
D 20 ~ 2 x D min. distance
C
D 40 ~ 1 x D drilling depth C ~ 4 x D driver length
flute length C
total length
E
E
Head forms Standard designs E Special designs

(Position of supporting G Suitable for all materials,
strips.) but for larger hole tolerances
Suitable for all materials, A
but for smaller hole tolerances A
A
C Suitable for all materials,
but only when spotting
conditions are unfavourable
Suitable for difficult-to-machine D
materials, i.e. high-alloyed steels D This design is predominantly
D
E Supporting strip suitable for grey cast iron

Standard point grinds (special point grinds available)
Ø 2…4,00 mm Ø 4,01…20,00 mm Ø 20,01…40 mm
30° 15° A 30° 15° 15°
20° 12° 30° 18° 10°
35° 30° 25° 35° 30° 30° 0,3 ... 0,7 25°
15° D 20° 12° 27° 15° 10° 20° 0,7 ... 1,2
40°
D D D 21°
4 4 4
D D D

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