Taper standards
L3
Steep taper shanks DIN 69871 / DV
L4 L5
L2
L1
DV
30
40
45
50
ØD1
31.75
44.45
57.15
69.85
ØD2 max.
45 50
50
63
80
ØD3
63.55
82.55
97.5
L1 L2
47.8 19.1
68.4 19.1
82.7 19.1
101.75
Form AD
19.1
Position of the cutting edge on single cutter tools
L3 min.
35
35
35
35
L4 L5
16.4
22.8
29.1 31.3 19.3 M20
35.5 37.7 25.7 M24
19
25
20˚
Form AD/B
b
16.1 M12
16.1 M16
M
Centre and flange through coolant
y
L1
L2
L3 L3
Steep taper shanks JIS B6339/BT
BT
30
40
45
50
ØD1 ØD2
31.75
44.45
57.15
69.85
46
63
85
100
y
2
2
3
3
L1 L2 L3
48.4
65.4
82.8
101.8
Form BT
20
25
30
35
16.3 16.1 M12
22.6 16.1 M16
29.1 19.3 M20
35.4 25.7 M24
b
20˚
M
Form BT/B
Centre and flange through coolant
Hollow taper interface DIN 69893, form A
L3
HSK-A 32
40 40
50 50
63 63
80 80
100 100
L1
L2
Ø10
ØD1 ØD2
32
24.007 30.007 38.009 48.010 60.012 75.013
ØD3 max. 26
34 20 20 35
42 25 26 42
53 32 26 42
68 40 26 42
88 50 29 45
L1 L2
16 20 35
L3 min.
b1
7.05 8.05 10.54 12.54 16.04 20.02 5.4 5.2 5.1 5.0 4.9 4.9
t1
Position of the cutting edge on single cutter tools
Hollow taper interface DIN 69893, form E
L3
L1
L2
HSK-E
32 32
40 40
50 50
63 63
25
ØD1 ØD2
25
19.006 24.007 30.007 38.009 48.010
ØD3 max. 20
26 16 20 35
34 20 20 35
42 25 26 42
53 32 26 42
L1 L2
13 10 20
L3 min.
L1
L2
Orientation groove
BIG CAPTO (compatible with ISO 26623-1, polygonal hollow shank taper with face contact)
C
4
5
6
8
ØD1
40 24 20
50 30 20
63 38 22
80 48 30
L1 L2
Position of the cutting edge on single cutting tools
6
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