CNMG Inserts Manufacturer & Supplier in China
Source standard and custom CNMG turning inserts from China for external turning, facing, boring, and roughing-to-finishing applications. CarbideMatch reviews insert size, workpiece material, cutting conditions, chip control, carbide grade, coating, and edge preparation against your technical requirements.
What Is a CNMG Insert?
A CNMG insert is an 80° rhombic, double-sided negative turning insert with a 0° clearance angle, M-class tolerance and a central fixing hole. Its strong cutting corners and double-sided construction make the family commonly used for general turning, facing, boring and roughing-to-finishing operations, subject to the selected chipbreaker, carbide grade, coating and cutting conditions.
Key Specifications
Insert Shape
80° Rhombic
Clearance Angle
0° Clearance (Negative Insert)
Tolerance Class
M Class
Insert Configuration
Double-Sided, With Hole
Common ISO Sizes
0903, 1204, 1606, 1906
Primary Applications
General Turning, Facing, Boring
Custom CNMG Insert Options
Configure the key manufacturing details for your insert application, from dimensions and cutting material to edge condition and identification.
Dimensions & Tolerances
Specify insert dimensions and tolerances according to your drawings.
Cutting Material & Grade
Select insert material and grade to suit your machining application.
Top Geometry & Chip Control
Customize top geometry and chip control features for your cutting needs.
Edge Preparation
Specify edge honing, chamfers and other edge preparation options.
Coating & Surface Treatment
Choose coating and surface treatments to meet your cutting needs.
Marking & Packaging
Customize insert markings and packaging to meet your order requirements.
Available CNMG Insert Sizes
CarbideMatch offers CNMG inserts in the standard sizes listed below, with custom dimensions and application-specific configurations available upon request. Send us your required designation, drawing, dimensions, sample, workpiece material, or cutting conditions for technical review and quotation.
ISO Designation
IC (mm)
S (mm)
RE (mm)
D1 (mm)
CNMG 090304
9.525
3.18
0.4
3.81
CNMG 090308
9.525
3.18
0.8
3.81
CNMG 120404
12.7
4.76
0.4
5.16
CNMG 120408
12.7
4.76
0.8
5.16
CNMG 120412
12.7
4.76
1.2
5.16
CNMG 120416
12.7
4.76
1.6
5.16
CNMG 160608
15.875
6.35
0.8
6.35
CNMG 160612
15.875
6.35
1.2
6.35
CNMG 160616
15.875
6.35
1.6
6.35
CNMG 190608
19.05
6.35
0.8
7.94
CNMG 190612
19.05
6.35
1.2
7.94
CNMG 190616
19.05
6.35
1.6
7.94
Don't See the Configuration You Need?
The configurations shown above represent commonly requested options and may not include everything we can supply. Contact us to check another specification or discuss your custom requirements.
CNMG Insert Applications
CNMG inserts are widely used for stable general-turning operations that benefit from a strong 80° cutting corner and double-sided insert economy. The suitable operation range depends on chipbreaker geometry, edge preparation, grade, coating, workpiece material and machine rigidity.
External Turning
CNMG inserts are commonly used for longitudinal external turning where a strong cutting corner and stable tool setup are available.
Facing & Shoulder Turning
The 80° rhombic form supports facing and selected shoulder-turning operations when matched with the correct holder approach angle.
Internal Turning & Boring
CNMG inserts can be used in sufficiently rigid boring bars for internal turning and boring of suitable diameters.
Medium Machining & Roughing
Stronger edge preparations and suitable chipbreakers can support medium machining and roughing under stable cutting conditions.
Multi-Material Turning
Different substrates, coatings, chipbreakers and edge preparations can be evaluated for steels, stainless steels, cast irons and other workpiece groups.
CNMG Inserts FAQs
What does CNMG mean in a turning insert designation?
In the ISO designation, C identifies an 80° rhombic shape, N indicates 0° clearance, M is the tolerance class, and G identifies the hole and chipbreaker configuration. The following numbers define nominal size, thickness and corner radius.
How many cutting edges does a CNMG insert have?
A conventional double-sided CNMG insert has four corners on each face, providing up to eight indexable cutting edges when the chipbreaker and holder arrangement permit both faces to be used.
What is the difference between CNMG and CCMT inserts?
CNMG is a double-sided negative insert with 0° clearance and a strong 80° corner. CCMT is a single-sided positive insert with 7° clearance. They require different holder seats and are selected for different cutting-force, accessibility and edge-strength requirements.
Which CNMG size should I choose?
Start with the toolholder seat specification, then match the ISO size, thickness, hole diameter and corner radius. Larger inserts and radii generally provide greater edge strength but require adequate machine power, rigidity and clearance.
How should I select a CNMG chipbreaker and grade?
Base the selection on workpiece material, operation, depth of cut, feed, cutting speed, coolant, interrupted-cut severity and machine stability. Use the intended working range of the selected chipbreaker rather than choosing by insert shape alone.
Can CarbideMatch manufacture a custom CNMG insert?
Custom dimensions, edge preparation, top geometry, carbide material, coating, marking or packaging can be reviewed from your drawing and application information. Feasibility should be confirmed before specification, sampling or production commitments are made.
About CarbideMatch
CarbideMatch is a cutting-tool manufacturer and multi-brand distributor with years of OEM manufacturing and industry experience. We currently focus on carbide and indexable inserts across a wide range of brands, grades and specifications.
Search by part number, ISO/ANSI code, grade or application to quickly identify suitable inserts and compatible alternatives
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- Application-Based Grade Matching
How We Work
Search by part number, ISO/ANSI code, grade or application — or send us your requirements and let us help match the right insert.
01
Submit Requirements
Share the part number, drawing, material or cutting conditions.
02
Review Application
We verify specifications, operation and performance goals.
03
Match the Solution
We match the right inserts to your materials, cutting conditions and requirements.
04
Quote & Sample
Confirm pricing, availability and samples when required.
05
Inspect & Deliver
Products are checked, securely packed and shipped on schedule.
06
Ongoing Support
We support trial feedback, repeat orders and optimization.