A panel cutter is a type of router bit used in woodworking to create a groove or dado in a panel or piece of wood. The bit has a straight cutting edge with a guide bearing that rides along the edge of the wood, ensuring a consistent and even cut.
Panel cutters come in a variety of sizes and shapes, including straight bits, spiral bits, and plunge bits. They can be used to create grooves for inserting panel inserts, such as glass or wood panels, or for creating rabbets or dados for joinery.
When using a panel cutter, it's important to take proper safety precautions, such as wearing eye and ear protection and using a router table or other secure surface to hold the wood. It's also important to use the proper technique to ensure that the groove or dado is consistent and even along the entire length of the wood. Some panel cutters come with a guide bearing that rides along the edge of the wood to help ensure a consistent cut depth and width.