Chipbreakers are designed for different cutting conditions, from finishing and semi-finishing to roughing. Select the geometry according to the workpiece material, feed rate and depth of cut. Refer to the chipbreaker guide for the application of each code and its recommended cutting range.
All dimensions are min mm unless otherwise stated.
L = cutting edge length; I.C. = inscribed circle diameter; S = thickness; Ød = center hole diameter; r = nose radius. Each row is a catalog entry. A product photo and cutting style apply to the rows below until the next photo.
CNMGCNMG model code and insert dimensions
CNMG Insert Applications and Specifications
CNMG inserts have an 80° diamond shape and a 0° clearance angle. They are commonly used for external turning and facing with a compatible toolholder. The appropriate chipbreaker and cutting edge should be selected according to whether the operation involves roughing, semi-finishing, or finishing.
When choosing a CNMG insert, check the insert size, thickness, nose radius, and toolholder compatibility. Material suitability depends on the specific insert grade and chipbreaker, rather than the CNMG designation alone.
CNMG 120408 Size Example
Specification
CNMG 120408
Insert shape
80° diamond
Clearance angle
0°
Inscribed circle diameter (mm)
12.70
Thickness (mm)
4.76
Nose radius (mm)
0.80
For models with the same CNMG 1204 designation, the final two digits indicate the nose radius: 08 = 0.8 mm, 12 = 1.2 mm, and 16 = 1.6 mm.
Product Photo / Cutting Style
Model
L
I.C.
S
Ød
Nose radius
Semi-finishing
CNMG120404-TM
12.9
12.7
4.76
5.16
0.4
CNMG120408-TM
12.9
12.7
4.76
5.16
0.8
CNMG120412-TM
12.9
12.7
4.76
5.16
1.2
CNMG120416-TM
12.9
12.7
4.76
5.16
1.6
CNMG160612-TM
16.1
15.875
6.35
6.35
1.2
CNMG190608-TM
19.3
19.05
6.35
7.94
0.8
CNMG190612-TM
19.3
19.05
6.35
7.94
1.2
Semi-finishing
CNMG120404-TM
12.9
12.7
4.76
5.16
0.4
CNMG120408-TM
12.9
12.7
4.76
5.16
0.8
CNMG120412-TM
12.9
12.7
4.76
5.16
1.2
Finishing / semi-finishing
CNMG090404-HQ
9.7
9.525
4.76
3.81
0.4
CNMG090408-HQ
9.7
9.525
4.76
3.81
0.8
CNMG120404-HQ
12.9
12.7
4.76
5.16
0.4
CNMG120408-HQ
12.9
12.7
4.76
5.16
0.8
CNMG120412-HQ
12.9
12.7
4.76
5.16
1.2
Finishing / semi-finishing
CNMG120404-CQ
12.9
12.7
4.76
5.16
0.4
CNMG120408-CQ
12.9
12.7
4.76
5.16
0.8
CNMG120412-CQ
12.9
12.7
4.76
5.16
1.2
CNMG160608-CQ
16.1
15.875
6.35
6.35
0.8
CNMG160612-CQ
16.1
15.875
6.35
6.35
1.2
Finishing / semi-finishing
CNMG120404-CQ
12.9
12.7
4.76
5.16
0.4
CNMG120408-CQ
12.9
12.7
4.76
5.16
0.8
CNMG120412-CQ
12.9
12.7
4.76
5.16
1.2
Semi-finishing / roughing
CNMG120404-GS
12.9
12.7
4.76
5.16
0.4
CNMG120408-GS
12.9
12.7
4.76
5.16
0.8
CNMG120412-GS
12.9
12.7
4.76
5.16
1.2
CNMG160608-GS
16.1
15.875
6.35
6.35
0.8
CNMG160612-GS
16.1
15.875
6.35
6.35
1.2
CNMG190612-GS
19.3
19.05
6.35
7.94
1.2
CNMG190616-GS
19.3
19.05
6.35
7.94
1.6
Medium cutting
CNMG120404-MA
12.9
12.7
4.76
5.16
0.4
CNMG120408-MA
12.9
12.7
4.76
5.16
0.8
CNMG120412-MA
12.9
12.7
4.76
5.16
1.2
CNMG120416-MA
12.9
12.7
4.76
5.16
1.6
CNMG160608-MA
16.1
15.875
6.35
6.35
0.8
CNMG160612-MA
16.1
15.875
6.35
6.35
1.2
CNMG160616-MA
16.1
15.875
6.35
6.35
1.6
CNMG190612-MA
19.3
19.05
6.35
7.94
1.2
CNMG190616-MA
19.3
19.05
6.35
7.94
1.6
Medium cutting
CNMG09T304-MS
9.7
9.525
3.18
3.81
0.4
CNMG09T308-MS
9.7
9.525
3.18
3.81
0.8
CNMG120404-MS
12.9
12.7
4.76
5.16
0.4
CNMG120408-MS
12.9
12.7
4.76
5.16
0.8
CNMG120412-MS
12.9
12.7
4.76
5.16
1.2
CNMG160608-MS
16.1
15.875
6.35
6.35
0.8
CNMG160612-MS
16.1
15.875
6.35
6.35
1.2
CNMG160616-MS
16.1
15.875
6.35
6.35
1.6
CNMG190612-MS
19.3
19.05
6.35
7.94
1.2
CNMG190616-MS
19.3
19.05
6.35
7.94
1.6
Medium cutting
CNMG160608-ZS
16.1
15.875
6.35
6.35
0.8
CNMG160612-ZS
16.1
15.875
6.35
6.35
1.2
CNMG160616-ZS
16.1
15.875
6.35
6.35
1.6
Finishing / semi-finishing
CNMG120404-HA
12.9
12.7
4.76
5.16
0.4
CNMG120408-HA
12.9
12.7
4.76
5.16
0.8
CNMG120412-HA
12.9
12.7
4.76
5.16
1.2
Semi-finishing
CNMG120404-HS
12.9
12.7
4.76
5.16
0.4
CNMG120408-HS
12.9
12.7
4.76
5.16
0.8
CNMG120412-HS
12.9
12.7
4.76
5.16
1.2
CNMG160612-HS
16.1
15.875
6.35
6.35
1.2
CNMG160616-HS
16.1
15.875
6.35
6.35
1.6
CNMG190612-HS
19.3
19.05
6.35
7.94
1.2
CNMG190616-HS
19.3
19.05
6.35
7.94
1.6
Medium cutting
CNMG120404-PR
12.9
12.7
4.76
5.16
0.4
CNMG120408-PR
12.9
12.7
4.76
5.16
0.8
CNMG120412-PR
12.9
12.7
4.76
5.16
1.2
Semi-finishing
CNMG120404-PM
12.9
12.7
4.76
5.16
0.4
CNMG120408-PM
12.9
12.7
4.76
5.16
0.8
CNMG120412-PM
12.9
12.7
4.76
5.16
1.2
Medium cutting
CNMG120404-MS
12.9
12.7
4.76
5.16
0.4
CNMG120408-MS
12.9
12.7
4.76
5.16
0.8
CNMG120412-MS
12.9
12.7
4.76
5.16
1.2
Medium cutting
CNMG120404
12.9
12.7
4.76
5.16
0.4
CNMG120408
12.9
12.7
4.76
5.16
0.8
CNMG120412
12.9
12.7
4.76
5.16
1.2
DNMGDNMG model code and insert dimensions
Product Photo / Cutting Style
Model
L
I.C.
S
Ød
Nose radius
Semi-finishing
DNMG150404-TM
15.5
12.7
4.76
5.16
0.4
DNMG150408-TM
15.5
12.7
4.76
5.16
0.8
DNMG150412-TM
15.5
12.7
4.76
5.16
1.2
DNMG150416-TM
15.5
12.7
4.76
5.16
1.6
DNMG150604-TM
15.5
12.7
6.35
5.16
0.4
DNMG150608-TM
15.5
12.7
6.35
5.16
0.8
DNMG150612-TM
15.5
12.7
6.35
5.16
1.2
DNMG150616-TM
15.5
12.7
6.35
5.16
1.6
Semi-finishing
DNMG150404-TM
15.5
12.7
4.76
5.16
0.4
DNMG150408-TM
15.5
12.7
4.76
5.16
0.8
Finishing / semi-finishing
DNMG110402-HQ
11.6
9.525
4.76
3.81
0.2
DNMG150404-HQ
15.5
12.7
4.76
5.16
0.4
DNMG150408-HQ
15.5
12.7
4.76
5.16
0.8
DNMG150412-HQ
15.5
12.7
4.76
5.16
1.2
DNMG150604-HQ
15.5
12.7
6.35
5.16
0.4
DNMG150608-HQ
15.5
12.7
6.35
5.16
0.8
DNMG150612-HQ
15.5
12.7
6.35
5.16
1.2
Finishing / semi-finishing
DNMG150404-CQ
15.5
12.7
4.76
5.16
0.4
DNMG150408-CQ
15.5
12.7
4.76
5.16
0.8
DNMG150412-CQ
15.5
12.7
4.76
5.16
1.2
DNMG150604-CQ
15.5
12.7
6.35
5.16
0.4
DNMG150608-CQ
15.5
12.7
6.35
5.16
0.8
DNMG150612-CQ
15.5
12.7
6.35
5.16
1.2
Semi-finishing / roughing
DNMG150404-GS
15.5
12.7
4.76
5.16
0.4
DNMG150408-GS
15.5
12.7
4.76
5.16
0.8
DNMG150412-GS
15.5
12.7
4.76
5.16
1.2
DNMG150604-GS
15.5
12.7
6.35
5.16
0.4
DNMG150608-GS
15.5
12.7
6.35
5.16
0.8
DNMG150612-GS
15.5
12.7
6.35
5.16
1.2
Medium cutting
DNMG110412-MA
11.6
9.525
4.76
3.81
1.2
DNMG150404-MA
15.5
12.7
4.76
5.16
0.4
DNMG150408-MA
15.5
12.7
4.76
5.16
0.8
DNMG150412-MA
15.5
12.7
4.76
5.16
1.2
DNMG150604-MA
15.5
12.7
6.35
5.16
0.4
DNMG150608-MA
15.5
12.7
6.35
5.16
0.8
DNMG150612-MA
15.5
12.7
6.35
5.16
1.2
DNMG150616-MA
15.5
12.7
6.35
5.16
1.6
Medium cutting
DNMG150404-MS
15.5
12.7
4.76
5.16
0.4
DNMG150408-MS
15.5
12.7
4.76
5.16
0.8
DNMG150412-MS
15.5
12.7
4.76
5.16
1.2
DNMG150604-MS
15.5
12.7
6.35
5.16
0.4
DNMG150608-MS
15.5
12.7
6.35
5.16
0.8
DNMG150612-MS
15.5
12.7
6.35
5.16
1.2
Finishing / semi-finishing
DNMG150404-HA
15.5
12.7
4.76
5.16
0.4
DNMG150408-HA
15.5
12.7
4.76
5.16
0.8
DNMG150604-HA
15.5
12.7
6.35
5.16
0.4
DNMG150608-HA
15.5
12.7
6.35
5.16
0.8
Semi-finishing
DNMG150404-HS
15.5
12.7
4.76
5.16
0.4
DNMG150408-HS
15.5
12.7
4.76
5.16
0.8
DNMG150412-HS
15.5
12.7
4.76
5.16
1.2
DNMG150604-HS
15.5
12.7
6.35
5.16
0.4
DNMG150608-HS
15.5
12.7
6.35
5.16
0.8
DNMG150612-HS
15.5
12.7
6.35
5.16
1.2
Medium cutting
DNMG150404-PR
15.5
12.7
4.76
5.16
0.4
DNMG150408-PR
15.5
12.7
4.76
5.16
0.8
DNMG150412-PR
15.5
12.7
4.76
5.16
1.2
Semi-finishing
DNMG150404-PM
15.5
12.7
4.76
5.16
0.4
DNMG150408-PM
15.5
12.7
4.76
5.16
0.8
DNMG150412-PM
15.5
12.7
4.76
5.16
1.2
Semi-finishing
DNMG150404-PM
12.9
12.7
4.76
5.16
0.4
DNMG150408-PM
12.9
12.7
4.76
5.16
0.8
Medium cutting
DNMG150404-MS
15.5
12.7
4.76
5.16
0.4
DNMG150408-MS
15.5
12.7
4.76
5.16
0.8
DNMG150412-MS
15.5
12.7
4.76
5.16
1.2
Medium cutting
DNMG150404
15.5
12.7
4.76
5.16
0.4
DNMG150408
15.5
12.7
4.76
5.16
0.8
DNMG150412
15.5
12.7
4.76
5.16
1.2
DNMG150604
15.5
12.7
6.35
5.16
0.4
DNMG150608
15.5
12.7
6.35
5.16
0.8
DNMG150612
15.5
12.7
6.35
5.16
1.2
SNMG
Product Photo / Cutting Style
Model
L
I.C.
S
Ød
Nose radius
Semi-finishing
SNMG090304-TM
9.525
9.525
3.18
3.81
0.4
SNMG090308-TM
9.525
9.525
3.18
3.81
0.8
SNMG120404-TM
12.7
12.7
4.76
5.16
0.4
SNMG120408-TM
12.7
12.7
4.76
5.16
0.8
SNMG120412-TM
12.7
12.7
4.76
5.16
1.2
SNMG120416-TM
12.7
12.7
4.76
5.16
1.6
SNMG150608-TM
15.9
15.9
6.35
6.35
0.8
SNMG150612-TM
15.9
15.9
6.35
6.35
1.2
SNMG190608-TM
19.1
19.1
6.35
7.94
0.8
SNMG190612-TM
19.1
19.1
6.35
7.94
1.2
Semi-finishing
SNMG120404-TM
12.7
12.7
4.76
5.16
0.4
SNMG120408-TM
12.7
12.7
4.76
5.16
0.8
SNMG120412-TM
12.7
12.7
4.76
5.16
1.2
Semi-finishing / roughing
SNMG120404-GS
12.7
12.7
4.76
5.16
0.4
SNMG120408-GS
12.7
12.7
4.76
5.16
0.8
SNMG120412-GS
12.7
12.7
4.76
5.16
1.2
SNMG120416-GS
12.7
12.7
4.76
5.16
1.6
SNMG190612-GS
19.1
19.1
6.35
7.94
1.2
Medium cutting
SNMG120404-MA
12.7
12.7
4.76
5.16
0.4
SNMG120408-MA
12.7
12.7
4.76
5.16
0.8
SNMG120412-MA
12.7
12.7
4.76
5.16
1.2
SNMG120416-MA
12.7
12.7
4.76
5.16
1.6
SNMG150608-MA
15.9
15.9
6.35
6.35
0.8
SNMG150612-MA
15.9
15.9
6.35
6.35
1.2
SNMG150616-MA
15.9
15.9
6.35
6.35
1.6
SNMG190612-MA
19.1
19.1
6.35
7.94
1.2
SNMG190616-MA
19.1
19.1
6.35
7.94
1.6
Medium cutting
SNMG090304-MS
9.525
9.525
3.18
3.81
0.4
SNMG090308-MS
9.525
9.525
3.18
3.81
0.8
SNMG120404-MS
12.7
12.7
4.76
5.16
0.4
SNMG120408-MS
12.7
12.7
4.76
5.16
0.8
SNMG120412-MS
12.7
12.7
4.76
5.16
1.2
SNMG120416-MS
12.7
12.7
4.76
5.16
1.6
SNMG150612-MS
15.9
15.9
6.35
6.35
1.2
SNMG150616-MS
15.9
15.9
6.35
6.35
1.6
SNMG190616-MS
19.1
19.1
6.35
7.94
1.6
Medium cutting
SNMG120404-MS
12.7
12.7
4.76
5.16
0.4
SNMG120408-MS
12.7
12.7
4.76
5.16
0.8
SNMG120412-MS
12.7
12.7
4.76
5.16
1.2
SNMG120416-MS
12.7
12.7
4.76
5.16
1.6
Finishing / semi-finishing
SNMG120404-HA
12.7
12.7
4.76
5.16
0.4
SNMG120408-HA
12.7
12.7
4.76
5.16
0.8
SNMG120412-HA
12.7
12.7
4.76
5.16
1.2
Semi-finishing
SNMG090304-HS
9.525
9.525
3.18
3.81
0.4
SNMG090308-HS
9.525
9.525
3.18
3.81
0.8
SNMG120404-HS
12.7
12.7
4.76
5.16
0.4
SNMG120408-HS
12.7
12.7
4.76
5.16
0.8
SNMG120412-HS
12.7
12.7
4.76
5.16
1.2
SNMG150612-HS
15.9
15.9
6.35
6.35
1.2
SNMG150616-HS
15.9
15.9
6.35
6.35
1.6
SNMG190612-HS
19.1
19.1
6.35
7.94
1.2
SNMG190616-HS
19.1
19.1
6.35
7.94
1.6
Semi-finishing
SNMG120404L-S
12.7
12.7
4.76
5.16
0.4
SNMG120408L-S
12.7
12.7
4.76
5.16
0.8
SNMG120412L-S
12.7
12.7
4.76
5.16
1.2
Semi-finishing
SNMG120404R-S
12.7
12.7
4.76
5.16
0.4
SNMG120408R-S
12.7
12.7
4.76
5.16
0.8
SNMG120412R-S
12.7
12.7
4.76
5.16
1.2
Semi-finishing
SNMG120404L-S
12.7
12.7
4.76
5.16
0.4
SNMG120408L-S
12.7
12.7
4.76
5.16
0.8
SNMG120412L-S
12.7
12.7
4.76
5.16
1.2
Semi-finishing
SNMG120404R-S
12.7
12.7
4.76
5.16
0.4
SNMG120408R-S
12.7
12.7
4.76
5.16
0.8
SNMG120412R-S
12.7
12.7
4.76
5.16
1.2
Medium cutting
SNMG120404-PR
12.7
12.7
4.76
5.16
0.4
SNMG120408-PR
12.7
12.7
4.76
5.16
0.8
SNMG120412-PR
12.7
12.7
4.76
5.16
1.2
Semi-finishing
SNMG120404-PM
12.7
12.7
4.76
5.16
0.4
SNMG120408-PM
12.7
12.7
4.76
5.16
0.8
SNMG120412-PM
12.7
12.7
4.76
5.16
1.2
Medium cutting
SNMG120404-MS
12.7
12.7
4.76
5.16
0.4
SNMG120408-MS
12.7
12.7
4.76
5.16
0.8
SNMG120412-MS
12.7
12.7
4.76
5.16
1.2
Medium cutting
SNMG120404
12.7
12.7
4.76
5.16
0.4
SNMG120408
12.7
12.7
4.76
5.16
0.8
SNMG120412
12.7
12.7
4.76
5.16
1.2
TNMG
TNMG Insert Applications and Specifications
TNMG inserts have a triangular shape with a 60° corner angle and a 0° clearance angle. They are used for general turning and facing with a compatible toolholder. Their smaller corner angle provides access to some profiles that are less accessible with an 80° insert, although the toolholder and workpiece geometry must also be considered.
Select the insert size, nose radius, and chipbreaker according to the cutting operation, required surface finish, and machining stability. Suitability for a particular workpiece material depends on the specific insert grade and chipbreaker.
TNMG 160408 Size Example
Specification
TNMG 160408
Insert shape
Triangular
Corner angle
60°
Clearance angle
0°
Inscribed circle diameter (mm)
9.525
Thickness (mm)
4.76
Nose radius (mm)
0.80
For models with the same TNMG 1604 designation, the final two digits indicate the nose radius: 04 = 0.4 mm, 08 = 0.8 mm, and 12 = 1.2 mm.
When to Choose TNMG Instead of CNMG or WNMG
TNMG has a 60° triangular shape, while CNMG and WNMG have 80° cutting corners. The narrower TNMG corner can provide better access to some workpiece profiles when paired with a suitable toolholder. The larger corners of CNMG and WNMG generally offer greater corner strength under comparable conditions.
Check your toolholder first: TNMG cannot directly replace CNMG or WNMG in the same insert pocket. Then choose the insert size, nose radius, chipbreaker and grade for your workpiece material and cutting conditions. Shape alone does not determine whether an insert is suitable for steel, stainless steel or cast iron.
WNMG inserts have a trigon shape with an 80° corner angle and a 0° clearance angle. Standard double-sided WNMG inserts provide six cutting corners, making them an economical option for general turning and facing with a compatible toolholder.
Choose the insert size, nose radius, and chipbreaker according to the cutting operation and machining stability. Suitability for steel, stainless steel, or cast iron depends on the specific insert grade and chipbreaker, rather than the WNMG designation alone.
WNMG 080408 Size Example
Specification
WNMG 080408
Insert shape
Trigon
Corner angle
80°
Clearance angle
0°
Inscribed circle diameter (mm)
12.70
Thickness (mm)
4.76
Nose radius (mm)
0.80
For models with the same WNMG 0804 designation, the final two digits indicate the nose radius: 04 = 0.4 mm, 08 = 0.8 mm, 12 = 1.2 mm, and 16 = 1.6 mm.
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