CNMA 160612 dimensions
| Inscribed circle IC | 15.875 mm |
| Cutting edge length | 16.12 mm |
| Thickness s | 6.35 mm |
| Nose radius rε | 1.2 mm |
| Corner angle | 80° |
| Clearance angle | 0° |
| Tolerance M | IC ±0.10 · corner height ±0.15 · thickness ±0.13 mm |
| ANSI equivalent (inch) | CNMA 543 |
What CNMA 160612 tells you on the shop floor
80° corner: strong yet versatile, turns and faces with the same insert.
Double-sided negative insert: edges on both faces, stronger and cheaper per edge. Needs a rigid machine and clamping; not for small bores.
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.
Large radius: strong edge, takes high feeds. More radial force, watch slender parts.
Typical holders for CNMA
For a negative rhombic 80° insert the most common ISO 5608 holders are:
- PCLNR/L · lead angle 95°
- PCBNR/L · lead angle 75°
- DCLNR/L · lead angle 95°
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 CNMA 543: size in eighths of an inch, thickness in sixteenths, radius in sixty-fourths. Converting any code, both ways, is in ISO Inserts Pro.
Other CNMA 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.