Headless Drill Bush-standard: DIN 179 similar to ISO 4247

d1
short
medium
long
d2
r
tr
Above 0.4 to 0.8
graded bores d1 (15 in increments of 0.1 & 0.25 mm )15 preferably 0.5 mm
6
3
1
0.01
Above 0.8 to 1.0
6
9
3
Above 1.0 to 1.8
4
Above 1.8 to 2.6
5
Above 2.6 to 3.3
8
12
16
6
1
Above 3.3 to 4.0
7
Above 4.0 to 5.0
8
Above 5.0 to 6.0
10
16
20
10
1.5
0.02
Above 6.0 to 8.0
12
Above 8.0 to 10.0
12
20
25
15
2
Above 10.0 to 12.0
18
Above 12.0 to 15.0
16
28
36
22
Above 15.0 to 18.0
26
Above 18.0 to 22.0
20
36
45
30
3
Above 22.0 to 26.0
35
Above 26.0 to 30.0
25
45
56
42
Above 30.0 to 35.0
48
Above 35.0 to 42.0
30
56
67
55
3.5
0.04
Above 42.0 to 48.0
62
Above 48.0 to 55.0
70
Above 55.0 to 63.0
35
67
78
78
4
   
. Material: Steel selected by manufacturer

Hardness: 740+80 HV10

How to order: Headless drill bush DIN 179 d1*l1