michaelturri

Hi Rob,

Thanks for this contribution. I've used mills in the past and was shocked to see that spiral bits are often 50%+ more expensive than their superior end mill counterparts.

I have a couple questions for you (and the larger community here). Traditionally, two- and three-fluted end mills are slot cutters because of chip clearance and four-fluted mills are for edge finishing. Have you tried two- or three-fluted cutters? Why do you prefer four-fluted over them? Why do you prefer uncoated? Is it just a cost issue?