910 Series

Tool 910i2418B

The 910i2418B is a 3/8" chamfer mill from the 910 Series, for chamfering and deburring in steel. This version has 3 flutes and a 45° angle per side, which makes 90° included.

The tool's geometry sets the angle, so every chamfer comes out at the same angle in a single pass, and your Z depth sets the width.
The 0.030" tip has a dished end with its own cutting teeth, so you can blend a bottom cut as you chamfer.
Besides chamfering and deburring, you can take light slotting passes, which leave a V-shaped slot with a 0.030" flat at the bottom.
At 45° per side, it also cuts a 90° countersink.
You clamp a 3/8" shank that Sonic grinds to h6 for precision tool holders and leaves unpolished to help it resist slipping.
The AlTiN coating handles high temperatures and cuts down wear.
For aluminum, the 910i2418C is the same tool in TiB2.