Technical Information for Thread Milling Technical Information for Thread Milling
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.
Conversion of Cutting Speed to P=Thread Pitch A
Rotational SpeedConversion of selected cutting speed to rotationalNspeed is calculated by the following formula:Example: v=120 m/minD=30 mmVx 1000120 x 1000VN==1274 RPMVDJT x D3.14 x 30D=Cutting diameterTPI mm45686.05.04.03.53.01m D= Tool cutting diameter00D=21D=29
10 2.5122.0 0" 1 108 O Q o
Internal Thread External Thread 16 1.5201.25241.0 D=9 D=12 u
32 0.75
3
48 0.5 090
Left Hand Right Hand Left Hand
Thread Thread Thread mm 4 5 6 7 8 9 10 11 12 13 14 15 16 18 20 22 24 26 28 30 32 34 36 38 40 44 48 52 58 64
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