Disc milling Exchangeable heads
Technical information – Threading
Pitch (as of/up to)
Actual Thread
Standard thread form
Thread milling by circular interpolation can cause thread profi le violation when using insert for partial thread. Keep this in mind during the process of selecting tool. The tool diameter need to be small enough compare to the hole diameter. The pitch also needs to be considered.
Insert with partial profile for Metric ISO-Threads are multi tools. That means that each insert could machine different pitches. The insert is designed to meet the minimum pitch size (TPN); Machining this pitch will result in a standard conform thread form.
The given maximum pitch size (TPX) can be machined also with this insert at the expense of standard conformity: The result will be a slightly deeper thread than the standard. The deeper thread is normally accepted, but the application and use needs to be evaluated.
Following table is a recommendation over maximum tool diameter in relation to the thread size and pitch:
ISO-Thread, partial profile
Pitch
M12
M16
M20
M24
M27
M30
M36
M42
M48
M56
M60
1
10
14 12 10
18 16 14 12 10
22 20 18 16 14 12
25 24 22 20 18 16
28 26 24 22 20 18
34 32 30 28 26 24 22
40 37 35 32 30 29 27 24 22 20 19
45 43 40 37 36 35 32 30 27 25 23
53 51 48 45 43 42 39 37 34 31 29
57 55 52 48 47 46 43 40 37 35 32
1,5
8 7 6
2
2,5
8 6
3
3,5
4
4,5
5
5,5
6
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