Thank you! Of course I will write my experiences, since the purpose of this group is to help each other! But in the meantime, another question has arisen in my mind! Returning to the table that I sent in my first comment, in the Feed Speed ​​column the manufacturer gives values ​​​​that are orders of magnitude higher, even much higher than the ones I have used so far! This is what I don't understand!

HI! I promised to share my experience, unfortunately I only managed to do a small project now! Unfortunately, there is a flu epidemic here and I was sick! So the project: Machine: Lunyee 4040 Pro, Spindle: 500 W Material: walnut Model: dxf file, 160x85 mm, deer-shaped pocket 3 mm deep CNC bit: 1.5 mm end mill Pass/Depth: 0.75 mm Stepover: 0.6 mm 40% Spindle Speed: 12000 r.p.m Freed units: mm/sec Chipload: 1.75 mm Freed rate: 700 mm/sec Plunge rate: 350 mm/sec The operation took 20 minutes, the machine worked smoothly, without any trepidation! In the end, I was able to hold the tool by hand, it did not heat up!

HI! I tried to open this calculator, but only one image appeared! I guess it must be an excel file! What did I do wrong? Thanks!

Sorry! I solved it! I had to download it!