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Mill-Thread Technical Section
Tool Selection For indexable and solid carbide Mill Threads
The following chart provides a fairly accurate visual selection tool for Internal Threading. The chart is suitable for the following thread forms: ISO, UN, WHIT, NPT, NPTF, BSPT and PG.
21
29
10
8
7
5
9
12
4
6
3
4 5 6 7 8 9 10 1112 1314 15 1618 20 22 24 26 28 30 32 34 36 38 40 44 48 52 58 64
Any tool with a small cutting diameter can produce larger diameter threads. Example: Internal thread M30 x 1.5: Find a Milling Tool to produce d=30 Internal right hand ISO thread with a thread pitch P=1.5 mm. As can be seen from the chart above, the two red lines intersect at a selected tool with a cutting diameter of D=21 mm Chosen toolholder: SR0021 H21 Insert: 21 I 1.5 ISO MT7
30
1.5
If you need assistance, please call your local distributor and ask for help in selecting the appropriate tool as well as for a CNC program to suit your CNC milling machine.
B12-3
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