Yes, the greenLean can cut metals such as aluminum and brass. The gantry and Y carriage was designed to be rigid enough to handle these types of metals. The typical metal cutting techniques should be used, such as high feedrates to reduce heat buildup at the end mill, or the use of cutting fluids or cold air used at the end mill as is necessary with most machines that cut similar metals. This is necessary since the aluminum has a rather low melting point and can clog the end mill.

Additional Information:
All of our machines are capable of cutting many metals, including steel and aluminum as long as the proper CNC machining operations are used like light fast passes, and if desired, using air cooling for better performance.

Here is a video of one of our customer demonstrating aluminum cutting using air to cool the end mill.
https://www.buildyourcnc.com/tutorials/tutorial-milling-cutting-metal-blacktoe-mark-gottschalk

Additional Information:
how do I hold down material on a greenlean