Setting up a lock-miter bit
Lock-miter joints have a lot going for them: appearance, self-alignment for easy assembly and clamping, and ample gluing surfaces for strength. They're ideal for right-angle corners of boxes, columns, cabinets, frames, and the like. Plus, you can cut both parts of the joint with a single router-table setup.
But getting the correct router-table setup -- both the bit height and fence position have to be just right -- can be a challenge. Here's a sure-fire method for setting up this bit.