Choosing the Right Bit It prevents plastic chips from building up inside the curve of the cut. If you want to engrave acrylic, a 60° engraving bit is perfect for V-carving. It has a flat-edge tip that leaves you with a better edge quality than other bits.

When cutting plywood with a CNC router, the best router bits to use are spiral down-cut or compression bits. These bits are designed to produce clean edges and reduce splintering and tearout when cutting plywood.

The only cutting in a drill bit is at the bottom because as they cut down the hole is already cut and you only need to evacuate the chips. Router bits from your router table will work in a cnc except for bits with bearings.

One of the best applications of a CNC machine is engraving. Whether you're cutting metal, wood, or plastic, engraving is a process that's very difficult to do by hand because of the small scale and the fine detail involved. This is exactly where CNC machines excel.