High-Performance WNMG Turning Insert for Steel
The Indexable insert - WNMG...-PF RT325G is a well-thought-out solution for challenging turning tasks in steel. Functioning as a highly efficient chip problem-solver, this insert excels in finishing and medium machining of soft or tough steel grades. With its trigon base shape providing six usable cutting edges, it opens up flexible and economical application possibilities on CNC lathes. The specifically developed PF geometry and the latest generation CVD coating (RT325G grade) create a solid foundation for achieving fine surface finishes alongside dependable tool life. The turning inserts are supplied in a practical packaging unit of 10 pieces.
Suitable materials

Technical data
- Insert shape: WNMG (Trigon, 80° corner angle, 6 cutting edges)
- Material: Carbide (CVD-coated, P25 substrate)
- Grade: RT325G
- Processing: Medium machining and finishing
- Cutting conditions: Continuous and slightly interrupted cutting
- Workpiece suitability: Steel (ISO P)
- Packaging unit: 10 pieces
Dimensions of Indexable insert - WNMG...-PF RT325G
|
Item Nr. |
r |
L |
I.C |
S |
d |
| WNMG 060408-PF RT325G |
1661841 |
0,8 |
6,5 |
9,525 |
4,76 |
3,81 |
| WNMG 080404-PF RT325G |
1661842 |
0,4 |
8,7 |
12,7 |
4,76 |
5,16 |
| WNMG 080408-PF RT325G |
1661843 |
0,8 |
8,7 |
12,7 |
4,76 |
5,16 |
| WNMG 080412-PF RT325G |
1661844 |
1,2 |
8,7 |
12,7 |
4,76 |
5,16 |
Cutting data
|
Steel |
|
Vc (m/min) |
fn (mm/U) |
ap (mm) |
| WNMG 060408-PF RT325G |
140-260 |
0,10-0,30 |
1-2,5 |
| WNMG 080404-PF RT325G |
140-260 |
0,10-0,30 |
0,5-3 |
| WNMG 080408-PF RT325G |
140-260 |
0,10-0,30 |
1-3 |
| WNMG 080412-PF RT325G |
140-260 |
0,10-0,30 |
1,5-3 |
Applications
This turning insert is completely focused on the professional machining of steel materials. Its primary applications lie in finishing and medium turning, where controlled chip breaking is crucial for uninterrupted production. The PF chipbreaker demonstrates its full potential particularly when cutting soft and tough alloys that frequently tend to form long, stringy chips. The robust P25 substrate provides the necessary stability to handle continuous as well as slightly interrupted cuts smoothly and dimensionally accurately.
Special features
The combination of a next-generation CVD coating and the six-edge WNMG geometry makes this product an economically attractive choice. Each edge change delivers a strong price-to-performance ratio due to the high number of cutting corners. Furthermore, the precisely defined chip-forming geometry aids in reducing thermal loads. This directly translates into smoother surface textures and reliable, highly efficient workflows in daily operations.