ELI5: Explain Like I'm 5

2.5D (machining)

Okay kiddo, imagine you have a piece of paper with a picture of a car on it. You want to make the car look 3D, like a toy you can play with. But you can't just draw it because that would be flat.

So instead, you cut out the different pieces of the car from different sheets of paper, making sure each piece has a different height. Then you stack them on top of each other to make the car look 3D.

That's kind of like what 2.5D machining is. Instead of paper, we use materials like metal or plastic, and instead of cutting out pieces by hand, we use a computer and a machine called a mill or a router.

The computer program tells the machine where to cut the material, and how deep to cut. But unlike 3D printing, we can only cut in a straight line, so we can't make curves or smooth surfaces. That's why it's called 2.5D - it's kind of like halfway to being 3D.

So, 2.5D machining is a way to make things like car parts or phone cases out of materials like metal or plastic by cutting them into different shapes and heights using a computer and a machine.