Efficient machining of steel workpieces
With the indexable insert CNMG-PF RT325G, Rinaldi-Tools offers a professional solution for turning steel. The geometry is focused on improved chip control, supporting the machining process specifically during finishing and medium applications. The P25-grade carbide featuring a modern CVD coating allows for reliable use under continuous conditions as well as with slightly interrupted cuts.
Suitable materials

Technical data
- Material group: Steel
- Insert shape: CNMG
- Grade: RT325G (Next-generation CVD-coated P25-grade carbide)
- Processing: Medium and finish
- Cutting condition: Continuous and slightly interrupted cutting
- Packaging unit: 10 Pc.
Dimensions of the Indexable insert - CNMG...-PF RT325G
|
Item Nr. |
r |
L |
I.C. |
S |
| CNMG 120404-PF RT325G |
1661821 |
0,4 |
12,9 |
12,7 |
4,76 |
CNMG 120408-PF RT325G
|
1661822 |
0,8 |
12,9 |
12,7 |
4,76 |
CNMG 120412-PF RT325G
|
1661823 |
1,2 |
12,9 |
12,7 |
4,76 |
Cutting data
|
Steel |
|
Vc (m/min) |
fn (mm/U) |
ap (mm) |
CNMG 120404-PF RT325G
|
140-260 |
0,10-0,30 |
0,5-3 |
CNMG 120408-PF RT325G
|
140-260 |
0,10-0,30 |
1-3 |
CNMG 120412-PF RT325G
|
140-260 |
0,10-0,30 |
1,5-3 |
Applications
This turning insert is geared towards process-reliable steel machining in a professional environment. It proves itself particularly in applications that require a fine to medium depth of cut. Thanks to its tailored geometry, even tough or soft steel alloys can be machined with control, emphasizing the tool's universal character in everyday workshop operations.
Special features
The CVD coating of the RT325G grade provides high wear resistance, which has a positive influence on tool life. Designed as a negative turning insert, the CNMG shape offers the economic advantage of double-sided cutting edges. The specifically engineered chipbreaker helps to prevent long chips and generates short-breaking chips instead, which is beneficial for smooth turning processes.