The size of brass parts that can be CNC machined is limited by two main factors:

Machine Work Envelope:

• Every CNC machine has a specific work envelope, which is essentially the maximum travel distance of its cutting tools along the X, Y, and Z axes. This defines the largest cuboid-shaped volume that a part can occupy while being machined.
• Typical work envelope dimensions for CNC mills (used for machining complex shapes) might be around 64 inches (X) by 32 inches (Y) by 38 inches (Z) for larger machines but can be much smaller for desktop CNC mills.
• It's important to remember that even if a part fits within the total X, Y, and Z travel of the machine, there needs to be additional clearance for tool movement and fixturing to hold the brass piece during machining.

Tool Size and Reach:

• CNC machining relies on various cutting tools to remove material and create the desired part geometry. These tools come in different sizes and have limitations on their reach.
• Smaller, more intricate features on a brass part may require using very thin and delicate cutting tools. These tools can be prone to breakage if they experience too much force or deflection during machining.
• The reach of a tool also matters. Features located deep within a part cavity might not be accessible with certain tool shanks or extensions.

However, generally speaking, CNC machining is well-suited for creating small to medium-sized brass parts with features ranging from a fraction of a millimeter to a few centimeters in size. If you want to know more about it, please click here: From Design to Finish: Your Guide to CNC Machining Small Brass Parts.