Router bits come in a few different sizes, but for general purposes, you will almost always reach for a 1/2-inch router bit. These offer better stability and overall performance than smaller router bits. For fine or slight edge work, a 1/4-inch bit may be preferable.

What Is Better, Carbide or Steel Router Bits? Steel router bits are cheaper, but that is their only advantage. Carbide-tipped router bits maintain a sharper cutting edge far longer than steel; produce a better finish when cutting; and provide cleaner and smoother cuts.

When processing acrylic using a CNC router, solid carbide, up-spiral “O” flute router bits will produce the best results. They are available with one, two or three flutes. Common bit sizes are 1/8" to 1/2" diameter.

Router bits are imperative when it comes to forming shapes within a wide range of materials. This is achieved through the use of a routing tool that is suited to certain plastics, softwoods, hardwoods, and plywood.