TECHNICAL GUIDE Recommended Inserts For Different Threads / Pitches(mm)/ Minium Bore Dia
Minium bore dia. for thread milling
Insert dia
Thread
M14
M15
12 M/MF
M16
M18
M20
M20 15 M/MF M22
80
YIH TROUN ENTERPRISE CO.,LTD
Pitch mm
Internal 80%
Internal 100%
External 80%
External 100%
1.0
13.2
13.0
13.88
14
1.25
13.0
12.7
13.86
14
1.5
12.7
12.4
13.85
14
2.0
12.3
11.9
13.82
14
1.0
14.2
14.0
14.88
15
1.5
13.7
13.4
14.85
15
1.0
15.2
15.0
15.88
16
1.25
15.0
14.7
15.86
16
1.5
14.7
14.4
15.85
16
2.0
14.3
13.9
15.82
16 18
1.0
17.2
17.0
17.88
1.5
16.7
16.4
17.86
18
2.0
16.3
15.9
17.82
18
2.5
15.9
15.3
17.79
18
1.0
19.2
19.0
19.88
20
1.5
18.7
18.4
19.85
20
2.0
18.3
17.9
19.82
20
2.5
17.9
17.3
19.79
20
1.0
19.2
19.0
19.88
20
1.5
18.7
18.4
19.85
20
2.0
18.3
17.9
19.82
20
2.5
17.9
17.3
19.79
20
1.0
21.2
21.0
21.88
22
1.5
20.7
20.4
21.85
22
2.0
20.3
19.9
21.82
22
2.5
19.9
19.3
21.79
22