Roughing End Mill Geometry

[PurpLev]

I just picked up some carbide roughing end mills, I noticed that roughing end mills have different density of 'teeth' - from extra-course to extra fine. This got me thinking - what are the different application for each tooth geometry? where would you use course roughing end mills as opposed to fine toothed end mills?

 

[OldMachinist]

Coarse cutters are for heavy cuts in low to medium strength materials. Fine pitch is for shallower cuts in harder materials.

 

[PurpLev]

Thanks guys,

I'm glad my intuition was in action this time around