It’s also extra heat at that higher SFM. I’m not looking to set any land speed records with the material monday recipes. They’re supposed to be “safe” starting points for people, I’ve tried to make that clear by reminding people in the videos every couple episodes.
Furthermore, I would absolutely NOT want to use a 0.00013" chip load in aluminum. That worked in steel because the SFM was so low using small diameter tooling.
Also, that video did not take into account chip thinning. Have you seen the HEM video I put out? https://www.youtube.com/watch?v=wnv6Z72Ql24