- Features
| B57 geometry - the stable one |
| For unfavorable machining conditions and long chipping materials |
| 0 deg corner chamfer |
| 0.08 to 0.2 mm cutting edge length tolerance |
| 3 cutting edges |
| +/-0.13 mm thickness tolerance |
| 0.05 to 0.15 mm inscribed circle tolerance |
| 5.29 mm cutting edge length |
| 6 deg rake |
| 8 deg clearance |