Professional turning solution for precise contouring
The PVD-coated VBMT...-HM RT300 indexable insert is a well-thought-out solution for professional medium machining. With its 35° rhombic shape and HM chipbreaker, it creates ideal conditions for demanding longitudinal and contour turning tasks in steel and stainless steel. The tough carbide substrate combined with the wear-resistant PVD coating supports a consistent tool life and process-reliable chip evacuation, even during lightly interrupted cuts.
Suitable materials

Technical data
- Designation: Indexable insert VBMT...-HM RT300
- Insert shape: VBMT (35° rhombic)
- Grade: RT300 (PVD-coated carbide P15-P25 / M10-M25)
- Application: Medium machining
- Cutting conditions: Continuous and light interrupted cut
- Packaging unit: 10 pieces
Dimensions of Indexable insert - VBMT...-HM RT300
|
Item Nr. |
r |
L |
I.C. |
S |
d |
| VBMT 160404-HM RT300 |
1771321 |
0,4 |
16,5 |
9,525 |
4,76 |
4,4 |
| VBMT 160408-HM RT300 |
1771322 |
0,8 |
16,5 |
9,525 |
4,76 |
4,4 |
Cutting data
|
Steel |
Stainless Steel |
|
Vc (m/min) |
f (mm/rev.) |
ap (mm) |
Vc (m/min) |
f (mm/rev.) |
ap (mm) |
| VBMT 160404-HM RT300 |
120-240 |
0,05-0,2 |
0,23-2,5 |
110-200 |
0,08-0,3 |
0,23-2,5 |
| VBMT 160408-HM RT300 |
120-240 |
0,05-0,2 |
0,45-2,5 |
110-200 |
0,08-0,3 |
0,45-2,5 |
Applications
These 35° turning tools are designed for use on CNC and conventional lathes. They are highly suitable for medium longitudinal machining as well as complex contour profiles, where fine transitions and hard-to-reach areas must be turned securely. The RT300 carbide grade reliably covers universal cutting tasks in unalloyed to high-alloy steels and stainless steels.
Special features
The combination of a wear-resistant PVD coating and a tough substrate makes the VBMT...-HM highly suitable for changing requirements in modern manufacturing. The HM chipbreaker, precisely matched to medium machining, promotes a clean and controlled chip flow. Furthermore, with the available corner radii of 0.4 mm and 0.8 mm, the tool can be accurately adapted to the required surface finish and stability.