Used for CNC and drill rig machining.
speed:4500-8000(r/mm)
Feed speed:2-8(m/mm)

Center positioning edge's two sides main cutting edge using CNC one time taking shape can make sure main cutting edge's bouncing and center positioning's edge lying in the shaft axis.

Main cutting edge with lateral front angle will make cutting easy and quick.

Increasing two assistant spiral groove will make chip removing much more effective and avoil over-burning.

The enlarging of steel body's wording part will make the whole strength much better.