I'm noticing how the linking moves between each toolpath is fully 3 axis motion, as long as there is no stock in the way. It's a tiny detail but really cool since most of the time there's a Z retract before positioning X & Y to the next lead-in.
I agree with you, I would also add an end mill and a spherical cutter. And it would be cheaper in relation to the price of the product. A 20 mm end mill costs $140
1018 or any 1000 series of steel are the aluminum of steels. you can really feed it hard and go very fast. uncoated carbide is prolly good at 5 or 600 sfm but anything with altin alcrn tialn coatings your talking 1000+ sfm. that coating produces a thin layer of aluminum oxide on the tool at high temperatures. which resists wear to the edge. which is why its better to mill steels with air blast only when using those coatings. using coolant cools the edge too fast and chips it up, fracturing the coating until it breaks away. which snowballs into a mess quickly. because you no longer have the oxide being produced if there is no coating.
