High-performance CBN grooving insert for hard turning
The MGGN ...-CBN RTC20 is specifically designed for parting and grooving operations in hard materials. Equipped with the highly resistant RTC20 fine-grain CBN grade, this tool opens up flexible application possibilities when machining hardened steel. Its robust design supports efficient workflows by reliably withstanding the alternating loads encountered during interrupted cuts. In combination with holders of the MGM./MRM. system, this indexable insert represents a well-thought-out solution for professional machining tasks that demand dimensional accuracy in challenging materials.
Suitable materials

Technical data
- Grooving insert: MGGN
- Grade: RTC20 (CBN fine grain grade)
- Workpiece materials: Hard materials, especially hardened steel
- Grooving system: MGM./MRM.-System
- Packaging unit: 1 Pc.
Dimensions of MGGN ...-CBN RTC20
|
Item Nr. |
B |
R |
L |
S |
| MGGN 200-CBN RTC20 |
1331158 |
2 |
0,2 |
16 |
4,8 |
| MGGN 300-CBN RTC20 |
1331159 |
3 |
0,4 |
21 |
4,8 |
Cutting data
|
Hartdrehen |
|
Vc (m/min) |
f (mm) |
| MGGN 200-CBN RTC20 |
50-130 |
0,03-0,08 |
| MGGN 300-CBN RTC20 |
50-130 |
0,03-0,08 |
Applications
This grooving insert specializes in hard turning and is primarily used for machining hardened steels. Due to its high edge stability, the fine-grain CBN grade is excellently suited for grooving under continuous load as well as in interrupted cuts. It is designed for industrial use and can be seamlessly operated with compatible tool holders from the MGM./MRM. system.
Special features
The MGGN ...-CBN RTC20 impresses with its targeted alignment towards difficult-to-machine, hard materials. By utilizing a fine-grained CBN cutting edge, it provides reliable wear resistance even under shock loads. With widths of 2 mm or 3 mm, precise grooves and recesses can be achieved, making the insert an important component in professional turning operations.