Page 98 - Carmex - Inch Catalog 2022

®
Thread Turning Inserts Technical Section

Conversion of Cutting Speed to Rotational Speed

Conversion of a
selected cutting
speed to rotational
speed is calculated 1.18
by the following 12 400 12 1294
formula: 1.18

V=400 ft/min
Number of passes and depth of cut per pass for multitooth insert

Insert Size Depth of Cut per pass
Pitch No. of No. of
mm / TPI Teeth Ordering Code Passes
L mm I.C. 1 2 3 4
1.00 16 3/8 3 16 ER 1.0 ISO 3M 2 .015 .010
1.50 16 3/8 2 16 ER 1.5 ISO 2M 3 .017 .012 .008
ISO 1.50 22 1/2 3 22 ER 1.5 ISO 3M 2 .022 .015
External 2.00 22 1/2 2 22 ER 2.0 ISO 2M 3 .022 .016 .011
2.00 22 1/2 3 22 ER 2.0 ISO 3M 2 .030 .019
3.00 27 5/8 2 27 ER 3.0 ISO 2M 4 .023 .020 .017 .013
1.00 16 3/8 3 16 IR 1.0 ISO 3M 2 .013 .010
1.50 16 3/8 2 16 IR 1.5 ISO 2M 3 .015 .011 .008
ISO 1.50 22 1/2 3 22 IR 1.5 ISO 3M 2 .020 .015
Internal 2.00 22 1/2 2 22 IR 2.0 ISO 2M 3 .020 .014 .010
2.00 22 1/2 3 22 IR 2.0 ISO 3M 2 .028 .018
3.00 27 5/8 2 27 IR 3.0 ISO 2M 4 .023 .018 .015 .012
16 16 3/8 2 16 ER 16 UN 2M 3 .017 .012 .009
UN 16 22 1/2 3 22 ER 16 UN 3M 2 .023 .015
External 12 22 1/2 2 22 ER 12 UN 2M 3 .023 .017 .012
12 22 1/2 3 22 ER 12 UN 3M 2 .031 .020
8 27 5/8 2 27 ER 8 UN 2M 4 .024 .021 .018 .014
16 16 3/8 2 16 IR 16 UN 2M 3 .017 .011 .009
16 22 1/2 3 22 IR 16 UN 3M 2 .022 .015
UN 12 22 1/2 2 22 IR 12 UN 2M 3 .021 .015 .012
Internal
12 22 1/2 3 22 IR 12 UN 3M 2 .029 .019
8 27 5/8 2 27 IR 8 UN 2M 4 .025 .020 .016 .012
Whitworth 14 16 3/8 2 16 ER 14 W 2M 3 .020 .015 .011
55° 14 22 1/2 3 22 ER 14 W 3M 2 .028 .030
External 11 22 1/2 2 22 ER 11 W 2M 3 .026 .019 .013
Whitworth 14 16 3/8 2 16 IR 14 W 2M 3 .020 .015 .011
55° 14 22 1/2 3 22 IR 14 W 3M 2 .028 .018
Internal 11 22 1/2 2 22 IR 11 W 2M 2 .026 .019 .013
14 16 3/8 2 16 ER 14 NPT 2M 3 .021 .018 .017
11.5 22 1/2 2 22 ER 11.5 NPT 2M 4 .019 .019 .017 .013
NPT 11.5 27 5/8 3 27 ER 11.5 NPT 3M 4 .020 .019 .017 .012
External
8 27 5/8 2 27 ER 8 NPT 2M 4 .029 .026 .024 .021
14 16 3/8 2 16 IR 14 NPT 2M 3 .021 .018 .017
11.5 22 1/2 2 22 IR 11.5 NPT 2M 4 .019 .019 .017 .013
NPT
Internal 11.5 27 5/8 3 27 IR 11.5 NPT 3M 4 .020 .019 .017 .012
8 27 5/8 2 27 IR 8 NPT 2M 4 .029 .026 .024 .021
10 22 1/2 2 22 ER 10 APIRD 2M 3 .024 .020 .012
API Round
External 10 27 5/8 3 27 ER 10 APIRD 3M 2 .039 .016
8 27 5/8 2 27 ER 8 APIRD 2M 3 .031 .024 .016
10 22 1/2 2 22 IR 10 APIRD 2M 3 .024 .020 .012
API Round
Internal 10 27 5/8 3 27 IR 10 APIRD 3M 2 .039 .016
8 27 5/8 2 27 IR 8 APIRD 2M 3 .031 .024 .016

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