High-performance indexable insert for cast iron
The CNMG...-KC RT150K is a robust negative turning insert specifically developed for the demands of cast iron machining. With its durable CVD coating and tough K10-K20 substrate, it forms a strong foundation for medium turning applications. It convinces with high reliability in both continuous and heavily interrupted cuts.
Suitable materials

Technical data
- Shape: CNMG
- Processing: Medium
- Cutting condition: Continuous, light and heavy interrupted
- Workpiece Material: Cast Iron
- Grade: RT150K (CVD-coated K10-K20 carbide for cast machining)
- Packaging unit: 10 pieces
Dimensions of CNMG...-KC RT150K
| |
Item Nr. |
r |
L |
I.C |
S |
d |
| CNMG 120404-KC RT150K |
1661421 |
0,4 |
12,9 |
12,7 |
4,76 |
5,16 |
| CNMG 120408-KC RT150K |
1661422 |
0,8 |
12,9 |
12,7 |
4,76 |
5,16 |
| CNMG 120412-KC RT150K |
1661423 |
1,2 |
12,9 |
12,7 |
4,76 |
5,16 |
Cutting data
|
Cast Iron |
|
Vc (m/min) |
fn (mm/U) |
ap (mm) |
| CNMG 120404-KC RT150K |
200-400 |
0,2 -0,4 |
1-5 |
| CNMG 120408-KC RT150K |
200-400 |
0,2 -0,4 |
1-5 |
| CNMG 120412-KC RT150K |
200-400 |
0,2 -0,4 |
1-5 |
Applications
This carbide insert is highly suitable for the medium machining of cast alloys such as grey cast iron and ductile cast iron. Thanks to the resilient CNMG geometry, it opens up flexible application possibilities in industrial manufacturing, ensuring efficient chip evacuation and stable cutting edges across various cutting profiles.
Special features
A key feature of this insert is the advanced CVD coating, which noticeably minimizes wear when machining cast iron. The combination of four usable cutting edges and high corner stability creates excellent conditions for economical and precise machining, even on irregular workpiece surfaces.