TCMT 090204 dimensions
| Inscribed circle IC | 5.556 mm |
| Cutting edge length | 9.62 mm |
| Thickness s | 2.38 mm |
| Nose radius rε | 0.4 mm |
| Corner angle | 60° |
| Clearance angle | 7° |
| Tolerance M | thickness ±0.13 mm |
What TCMT 090204 tells you on the shop floor
60° corner: general turning, three corners (six edges if double-sided negative); not as strong as C and W.
Positive insert (7°): lower cutting forces and less chatter. For finishing, boring, thin-walled parts and lighter machines.
Pressed, medium tolerance: economical, fine for roughing and where you do not need repeatability to a few hundredths of a mm at every insert change.
Small radius: lower forces and chatter, good finish at low feed.
Typical holders for TCMT
For a positive triangular 60° insert the most common ISO 5608 holders are:
- STGCR/L · lead angle 90°
- STFCR/L · lead angle 90°
The final R or L means right or left hand. Shank size, length and the exact clamping are in the manufacturer's catalogue.
Other TCMT sizes
Designation to ISO 1832; reference tables: Mitsubishi Materials turning catalogue (insert identification). Holders to ISO 5608. Chipbreaker, grade and cutting data differ between manufacturers: the catalogue of the insert you use is what counts.