CNMA Inserts Manufacturer & Supplier in China
Source standard and custom CNMA turning inserts for stable rough turning of cast iron and other applications suited to flat-top negative geometry, with technical selection completed after application review.
What Is a CNMA Insert?
A CNMA insert is an ISO 80° diamond, 0°-clearance, M class turning insert. Its negative, double-sided flat-top insert without fixing hole supports stable rough turning of cast iron and other applications suited to flat-top negative geometry, depending on grade, edge preparation, holder geometry, work material, and cutting conditions.
Key Specifications
Insert Shape
80° diamond
Clearance Angle
0°
Tolerance Class
M class
Insert Configuration
Negative, double-sided flat-top insert without fixing hole
Common ISO Sizes
CNMA 1204, 1606, 1906
Primary Applications
Stable rough turning of cast iron and other applications suited to flat-top negative geometry
Custom CNMA 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 CNMA Insert Sizes
CarbideMatch offers CNMA 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)
CNMA 120404
12.7
4.76
0.4
5.16
CNMA 120408
12.7
4.76
0.8
5.16
CNMA 120412
12.7
4.76
1.2
5.16
CNMA 120416
12.7
4.76
1.6
5.16
CNMA 160608
15.875
6.35
0.8
6.35
CNMA 160612
15.875
6.35
1.2
6.35
CNMA 160616
15.875
6.35
1.6
6.35
CNMA 190612
19.05
6.35
1.2
7.94
CNMA 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.
CNMA Insert Applications
CNMA inserts are commonly considered for the following operations when holder access and cutting conditions are suitable.
External Turning
General external cuts where the CNMA shape and holder approach are compatible.
Profiling
Contour work using the access and edge engagement characteristic of 80° diamond geometry.
Semi-Finishing
Controlled stock removal with grade and edge condition selected for the material.
Finishing
Light cuts with feed, edge condition, and setup rigidity matched to the finish target.
Application Review
Drawing-based selection when access, interruption, or stock variation requires confirmation.
CNMA Insert FAQ
What holder details are required for a CNMA inquiry?
Provide the complete holder designation, hand, clamping components, seat condition, tool overhang, and clear pocket photographs.
How should CNMA samples be compared?
Hold the holder, toolpath, stock, coolant, and cutting data constant, then document tool life, wear mode, chip behavior, finish, and dimensional trend.
What information helps diagnose premature CNMA failure?
Send failure timing, wear photographs, material and hardness, interruption pattern, speed, feed, depth, coolant, runout, and setup rigidity.
Can CNMA inserts be private marked?
Private marking and packaging can be reviewed after traceability content, marking area, quantity, packaging format, and approval criteria are agreed.
How is a drawing-based CNMA variation inspected?
The drawing must identify datums, critical dimensions, edge requirements, measurement methods, sampling plan, and acceptance limits before production.
What should be included in a CNMA replacement request?
Supply the full current marking and suffix, grade, holder, workpiece, cutting data, present result, and the specific performance target to match.
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
- Own Manufacturing Capabilities
- Multi-Brand Product Supply
- 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.