Hi,
I go with Dave, HSMAdvisor is good, so much so I bought it!
Don't know whether its much cop on non-metals.
The calculation really comes down to chipload. I use very small endmills (0.4-0.5mm) for circuit boards and I allow 1% diameter per flute per rev.
This keeps the cutting forces mid to low when the cut depth is 50% of diameter. For larger endmills say 3-6mm I go to 2% per flute per rev and
decent size ones say 12-16mm 3% per flute per rev.
Revs is just surface speed, with carbide 50m/min in stainless, 100m/min in steel, 200-500 m/min in aluminium or copper if you can clear the chips well
and/or coolant.
These rule-of-thumb numbers come from using HSMAdvisor and will get you in the ball park straight away.
Chiploads of 0.1 to 0.18 sounds awfully big chips. What units are you using?
Craig