[blue68f100]

At looking at your endmilled parts, you are not quite setup properly. I have a endmill that I use for making AL molds. Have been working with Al and SS for over 25 yrs. I have had many machinest ask me how I get clean cuts on AL. For some reason this soft metal gives them problems. The biggest mistake is running too fast, feed and bit. Most use to working with CS.

Use a 2 flute endmill (NON Carbide, HSS), more flute generate more heat. Run a slow speed (600-800rpm), use WD40 for the cutting fluid. Limit your cuts to 0.100 or less for rough cuts, and 0.020 for final, less if using small dia bits. Always move the bed toward the bit cutting edge. If you go the wrong direction it will force chips between the bit and part. And keep your chips cleaned out while it is cutting. Running too fast will load up the bit, gets hot and start sticking to the bit. Running on slow speed will give you super clean cuts. If you see smoke from the WD40 running to fast.

New project are always fun.