Tool 170i375L004A

Surface finish suffers when you push feed rates in steel. The chip load per tooth gets too aggressive for the edge geometry to handle cleanly.

The 170 Series spreads that load across seven cutting edges instead of the typical four.
Each flute takes a smaller bite while maintaining aggressive table feeds.
The TiAlSiN coating runs cooler than uncoated carbide and resists the chemical wear that steel and nickel alloys create at higher cutting temperatures.
The 0.004" corner radius strengthens the cutting edge where maximum stress concentrates.
Sharp corners chip out faster under interrupted cuts or when entering varying material hardness.
This geometry handles steel, iron, titanium, and nickel alloys with consistent edge life.
Requires a rigid spindle and consistent engagement.
Part deflection or chatter will overload the smaller flutes.