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DIN 335 Standard Dimensions for Countersinks 90°

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This norm specifies the characteristics of Countersinks 90° in high speed steel. The A and B types are mainly used for deburring and the C and D types for reducing

Dimensional Drawing and Technical Diagrams

1922_4122.jpg

Key Dimensions and Technical Parameters

Dimensions in mm - source DIN 335 Form A
Publication date: 12/2007 Replaces 09/1979 edition
d1 d2 d3 l1 l2 Nr. of cutters
8 - - 48 - 5
12,5 8 2 48 16 5 or 6
16 10 3,2 56 20 6 or 7
20 10 5 60 24 6 or 7

Dimensions in mm - source DIN 335 Form B
Publication date: 12/2007 Replaces 09/1979 edition
d1 d3 l1

l2

 l3 Nr. of cutters
16 3,2 95 20 30 6 or7
25 7 118 26 38 7 to 9
31,5 9 122 30 42 7 to 9
40 12 150 35 51 10 to 12
50 16 155 38 56 12 to 14
63 20 185 43 61 14 to 16
80 25 196 54 72 16 to 18
Dimensions in mm - source DIN 335 Form C
Publication date: 12/2007 Replaces 09/1979 edition
d1 d2 d3 l1 l2 l4
4,3 4 1,3 40 3,5 26
5 4 1,5 40 4 28
5,3 4 1,5 40 4 28
5,8 5 1,5 45 4,5 28
6 5 1,5 45 4,5 28
6,3 5 1,5 45 5 28
7 6 1,8 50 5 36
7,3 6

1,8

 50 5,6 36
8 6 2 50 6 36

8,3

 6 2 50 6 36
9,4 6 2,2 50 6,7 36
10 6 2,5 50 7,1 36
10,4 6 2,5 50 7,1 36
11,5 8 2,8 56 8 36
12,4 8 2,8 56 8 36
13,4 8 2,9 56 8,5 36
15 10 3,2 60 9 40
16,5 10 3,2 60 10 40
19 10 3,5 63 11,2 40
20,5 10 3,5

63

 12,5 40
23 10 3,8 67 13,2 40
25 10 3,8 67 15 40

Dimensions in mm - source DIN 335 Form D
Publication date: 12/2007 Replaces 09/1979 edition
d1 d2 l1 l2 r min r max
0.5 3.15

25

2,12

 1,6 1,5
0,8 3,15 25 2,65 2,5

2
1 3,15 31,5 3 3,15 2,5
1,25 3,15 31,5 3.35 4 3,15
1,6 4 35,5 4,25 5 4
2 5 40 5,3 6,3 5
2,5 6,3 45 6,7 8 6,3
3,15 8 50 8,5 10 8
4 10 56 10,6 12,5 10
5 12,5 63 13,2 16 12,5
6,3 16 71 17 20 16
8 20 80 21,2 25 20
10 25 100 26,5 31,5 25
12,5 31,5 125 33,5 40 31,5

Reproduced by permission of DIN Deutsches Institut für Normung e. V. The definitive version for the implementation of this standard is the edition bearing the most recent date of issue, obtainable from Beuth Verlag GmbH, Burggrafenstraße 6, 10787 Berlin, Germany.
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