DCMT 070204 dimensions
| Inscribed circle IC | 6.35 mm |
| Cutting edge length | 7.75 mm |
| Thickness s | 2.38 mm |
| Nose radius rε | 0.4 mm |
| Corner angle | 55° |
| Clearance angle | 7° |
| Tolerance M | IC ±0.05 · corner height ±0.11 · thickness ±0.13 mm |
| ANSI equivalent (inch) | DCMT 21.51 |
What DCMT 070204 tells you on the shop floor
55° corner: gets into shoulders and follows profiles. For semi-finishing and finishing.
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 DCMT
For a positive rhombic 55° insert the most common ISO 5608 holders are:
- SDJCR/L · lead angle 93°
- SDNCN · lead angle 62.5°
The final R or L means right or left hand. Shank size, length and the exact clamping are in the manufacturer's catalogue.
Toolholders that take it
In inches, with the ANSI designation, the same insert is DCMT 21.51: size in eighths of an inch, thickness in sixteenths, radius in sixty-fourths. Converting any code, both ways, is in ISO Inserts Pro.
Other DCMT sizes
Same size, other version
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.