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CNMG 120408 Carbide Insert with 80° Diamond Shape, Double-Sided Design, and Negative Rake for CNC Turning
CNMG 120408 Carbide Insert with 80° Diamond Shape, Double-Sided Design, and Negative Rake for CNC Turning
Specifications
Description
The Carbide Insert CNMG 120408 is one of the most widely used indexable turning inserts for external and internal CNC turning.
With its 80° diamond shape, negative rake, and double-sided design, CNMG 120408 offers excellent edge strength, stable cutting performance, and low cost per edge.
This insert is an ideal choice for roughing and semi-finishing operations in steel, stainless steel, and cast iron machining.
Key Specifications of CNMG 120408
Insert Type: CNMG
ISO Size: 120408
Shape: 80° Diamond (C-type)
Relief Angle: 0° (Negative)
Tolerance: M
Chipbreaker: Optional (roughing / semi-finishing / finishing)
Coating Options: CVD / PVD
Application: CNC turning
Advantages of CNMG 120408 Carbide Inserts
1. High Edge Strength
The negative rake geometry provides excellent resistance to:
Heavy cutting loads
Interrupted cuts
Vibration during machining
2. Double-Sided with 8 Cutting Edges
Each CNMG 120408 insert offers 8 usable cutting edges, significantly reducing tooling cost per part.
3. Stable and Consistent Performance
CNMG inserts are well known for their:
Predictable tool life
Smooth chip evacuation with proper chipbreaker
Reliable surface finish in semi-finishing operations
Suitable Workpiece Materials
CNMG 120408 carbide inserts are suitable for machining:
Carbon steel (ISO P)
Alloy steel
Stainless steel (ISO M)
Cast iron (ISO K)
Different grades and coatings are available to match specific materials and cutting conditions.
Typical Applications
CNC lathes and turning centers
Automotive components
Shafts, flanges, and general turned parts
Heavy-duty roughing and semi-finishing
CNMG 120408 is especially popular in batch production and industrial machining environments.
Recommended Cutting Parameters (Reference)
Operation Cutting Speed (Vc) Feed (f) Depth of Cut (ap)
Roughing 120–220 m/min 0.25–0.45 mm/rev 2.0–6.0 mm
Semi-Finishing 150–260 m/min 0.15–0.30 mm/rev 0.5–3.0 mm
Actual cutting data depends on workpiece material, insert grade, coating, and machine rigidity.
Available Grades & Coatings
We supply CNMG 120408 inserts with:
CVD coatings (TiCN + Al2O3 + TiN) for long tool life
PVD coatings (TiAlN / AlTiN) for sharp edges and versatility
Fine-grain carbide substrates for improved toughness
Custom chipbreakers and grades are available upon request.
Why Choose Our CNMG 120408 Inserts?
As a professional carbide cutting insert manufacturer and exporter, we offer:
Stable and consistent quality
Competitive factory pricing
OEM & private label support
Bulk order supply capability
Fast response and technical support
Our CNMG inserts are widely used as cost-effective alternatives to major international brands.
Request Samples or Bulk Pricing
If you are sourcing Carbide Insert CNMG 120408 for CNC turning, we welcome your inquiry.
SUPPORT:
Request samples
Get technical recommendations
Receive bulk pricing
Discuss long-term cooperation
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CNMG 120408 Carbide Insert with 80° Diamond Shape, Double-Sided Design, and Negative Rake for CNC Turning

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CNMG 120408 Carbide Insert with 80° Diamond Shape, Double-Sided Design, and Negative Rake for CNC Turning

Xincheng (xiamen) cemented carbide co., ltd.

Verified Supplier
2 Years
fujian, xiamen
Business Type :
Manufacturer, Exporter, Seller
Main Products :
Cemented Carbide Rod, Tungsten Carbide Rod, Carbide Cold Heading Die
Total Annual :
10000000-18000000
Employee Number :
100~150
Certification Level :
Verified Supplier
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