CNC basics - How to Choose an End Mill for Aluminum
Flutes. This is arguably the most important feature to consider when choosing an end mill for CNC machined aluminum. Again, aluminum is gummy and soft, which means it tends to stick in the flutes of your CNC mill. While coatings can help alleviate this issue, if you're using a 4- or 5-flute end mill to cut aluminum, even the best coatings may ...