UNequal helix angle end mill

[kalmah]

Do you know ??
Have you ever used this kind of mill ??
Do you feel a real difference compared to the common roughing end mill ??

THank you for the answer

[laka]

I think they're designed to take the vibration away when taking heavy cuts. The different helix angles will take up different chip loads. I've used variable-pitch fluted endmills, and they work quite nicely in heavy cuts.