What Does Flute Count Change?

Role in feed calculation

Table feed is calculated with vf = fz × z × n, where z is the flute count. If fz and RPM stay constant, changing the number of flutes changes the calculated table feed.

Chip space

With the same tool diameter, flute design affects the space available for chips. Alpine aluminium families use three flutes and wide chip spaces, while the current steel and hardened-steel families use four flutes.

Evaluate together

• Workpiece material and chip form
• Slotting, side milling or finishing operation
• Tool diameter and cutting length
• Coating or polished surface
• Clamping and machine conditions