Proctologically Violated©® wrote:


2 flute can plunge cut, 4 flute cannot.


Pete,
Not quite correct.
4-flutes come in "center cutting" and non-center-cutting varieties.
Center-cutting 4 flutes plunge readily. May not have quite the chip
ejection as 2 flutes, but they still plunge very well--may have to peck
more.

Yes, I realized I was being pretty general, but most of the general
purpose 4 flutes don't center cut. (or at least they didn't used to. I'm
getting kinda old and haven't had to buy a 4 flute end mill in a while.....)

Pete

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Pete Snell
Royal Military College
Kingston Ontario


The reasonable man adapts himself to the world;
the unreasonable one persists in trying to adapt the world to himself.
Therefore all progress depends on the unreasonable man.
- George Bernard Shaw