Professional turning insert for stainless steel
The indexable insert VBMT 1604..-MM RT255M provides a well-engineered solution for demanding turning operations. Crafted from robust M20-M30 carbide, it features a protective PVD coating that supports tool life during stainless steel machining. This version is specifically designed for medium processing, handling continuous as well as slightly interrupted cutting conditions with high reliability. Professionals benefit from a practical selection of corner radii to accurately trace workpiece contours.
Suitable materials

Technical data
- Shape: VBMT
- Processing: Medium
- Cutting conditions: Continuous and light interrupted
- Workpiece material: Stainless Steel
- Grade: RT255M (PVD coated M20-M30 carbide)
- Packaging unit: 10 pieces
Dimensions of Indexable insert - VBMT 1604..-MM RT255M
|
Item Nr. |
r |
L |
I.C. |
S |
d |
| VBMT 160404-MM RT255M |
1771451 |
0,4 |
16,5 |
9,525 |
4,76 |
4,4 |
| VBMT 160408-MM RT255M |
1771452 |
0,8 |
16,5 |
9,525 |
4,76 |
4,4 |
Cutting data
|
Stainless Steel |
|
Vc (m/min) |
f (mm/rev.) |
ap (mm) |
| VBMT 160404-MM RT255M |
100-200 |
0,07-0,21 |
0,25-2,7 |
| VBMT 160408-MM RT255M |
100-200 |
0,08-0,27 |
0,5-2,7 |
Applications
Thanks to its specific design for stainless steel, this turning insert excels in industrial environments such as plant construction or medical technology manufacturing. The geometry opens up flexible application possibilities in facing and longitudinal turning of medium-sized components, where consistently high cutting quality is required.
Special features
As a first choice for stainless steel, this tool features a wear-resistant M20-M30 carbide grade with PVD coating, establishing strong resistance to thermal stress. This ensures stable process control even during light interrupted cuts. The insert is supplied in a convenient packaging unit of 10 pieces to support efficient workflows in production.