In the past, we had to manually adjust the cutting force coefficient for non-90 degree lead angle indexable face mills, especially high feed mills. This was due to the cutting force changing direction. This impacted the depth of cut limits, not the stable speeds which were correct. We created new material databases and an iPhone calculator. We even created a special training lesson:
In this release, we have added algorithms that automatically do the calculations based on the lead angle in the tool details page and changes the cutting force value for you.