Jobber drills with straight shank DIN 338

Shank designs for solid carbide straight shanks
to DIN 6535 (extract)
plain form HA with drive flat form HB
Fase chamfer
without Zentrierbohrung centre hole
with one drive flat for
d1 = 6 … 20 mm
45°+1°
b 1
e 1
chamfer Fase
without Zentrierbohrung centre hole
d1
d1
h1
l 1
l 1
with two drive flats for
d1 = 25 and 32 mm
b 1
e 1
45°+1°
l 2
without
centre Zentrierbohrung hole
dimensions in mm
d1
d 1
h6
2
3
4
5
6
8
10
12
14
16
18
20
25
32
l 1
+2
0
28
28
28
28
36
36
40
45
45
48
48
50
56
60
dimensions in mm
d 1
h6
6
8
10
12
14
16
18
20
25
32
b 1
+0.05
0
4.2
5.5
7.0
8.0
8.0
10.0
10.0
11.0
12.0
14.0
e 1
0
-1
18.0
18.0
20.0
22.5
22.5
24.0
24.0
25.0
32.0
36.0
h 1 l 1
+2
h 11 0
5.1
6.9
8.5
10.4
12.7
14.2
16.2
18.2
23.0
30.0
Fase chamfer
36
36
40
45
45
48
48
50
56
60
l 2
+1
0
-
-
-
-
-
-
-
-
17
19
whistle notch flat without coolant ducts*
form HE
for d1 = 6 … 20 mm
l1
l 4
l5
dimensions in mm
47°-2°
for d1 = 25 and 32 mm
r 2
2°-30’
6 +1
43° +2°
(b 2)
d1
h 2
without ohne Zentrierbohrung
centre hole
chamfer Fase
(b 3)
d 1
h6
6
8
10
12
14
16
18
20
25
32
(b2)
≈
4.3
5.5
7.1
8.2
8.1
10.1
10.8
11.4
13.6
15.5
(b 3) h 2
-
-
-
-
-
-
-
-
9.3
9.9
h11
5.1
6.9
8.5
10.4
12.7
14.2
16.2
18.2
23.0
30.0
(h3) l 1
+2
0
-
-
-
-
-
-
-
-
24.1
31.2
36
36
40
45
45
48
48
50
56
60
l4
0
-1
25
25
28
33
33
36
36
38
44
48
l5
nom.
p
18.0
18.0
20.0
22.5
22.5
24.0
24.0
25.0
32.0
35.0
r2
min.
1.2
1.2
1.2
1.2
1.2
1.6
1.6
1.6
1.6
1.6
d1
(h3)
*design: straight shanks to DIN 6535 are available with or without oil feed holes.
Applications for various tools, dimensions and positionof oilfeed holes are fully
described within the standard range sections.
254