7 helpful tips for cutting aluminum with a CNC milling machine!

Understanding these steps for cutting aluminum with a CNC milling machine can help you improve the quality and safety of your cuts. Let’s take a look at these practical tips.

1. Take your time. The material removal rate will be slower than a milling machine, but since most CNC milling machines handle larger material than a standard milling machine, the speed to size ratio is a good trade-off.

2. Use the correct milling cutter. Use a 2 or 3 flute carbide end mill. They allow your router to have higher spindle speeds. Avoid using cobalt and high-speed steel tools for machining aluminum.

3. Use smaller diameter tools. Instead of using a 1/2-inch end mill, use a 1/4-inch or smaller. This results in higher feed rates and smoother cuts.

4. Clean up the chips. Keeping chips away from the mill prevents end mill breakage. If possible, aim the air jet at the cutting point of the end mill. This will keep the cut away from chips that could build up and damage the milling cutter.

5. Lubrication. Lubricating oil is highly recommended. Not only does it make cutting easier and more successful, but it also helps keep cutting edges sharp. For best results, set up a lubricator to use with an air blast when clearing chips.

6. Avoid too slow feed speed. If the feed rate slows down too much, you run the risk of the tool grinding instead of cutting. Because the spindle spins so fast, this may be a greater risk for CNC mill users than milling machine users.

7. Learn from your mistakes. Everything has a learning curve, and success comes from persistence. Mistakes will happen, the key is to always stay safe and learn from them. Learn from your mistakes.