Positive square insert from Canela in grade TL40, for indexable drill bodies.
The SPMT designation follows ISO 1832: S square shape, P 11° clearance angle, M tolerance class, T with fixing hole and one-sided chipbreaker. The digits 120408 give the cutting edge length, the thickness and the corner radius, in that order.
Sold in boxes of 10. Not sure how to read the code? Insert designation explained.
