One of my (not immediate) future projects is a couple of sofa tables. Each will be about 9' long, 16" wide. I plan on using black granite tile for the top supported by ply. The tile will be surrounded by a 3/4" mahogany frame approximately 3" wide. The aprons will also be 3/4" x 3"+- mahogany. I want something resembling a parson's table. Now the problem:...
I would like for the meeting edges of apron and frame to be mitered. I could use a 3/4 x 3/4 glue block on the inside of one or the other to keep them aligned while gluing but I'm thinking that getting that perfectly aligned to the mahogany could be problematic. Especially given the length.
My next thought was to run the already mitered edges on a miter lock router bit on a router table. I have never used one but it seems to me that it too could be problematic unless both apron and frame are perfectly straight and flat over the entire length. Another potential problem is the relative delicacy of the mitered edge...it would have to be used to guide on either the table of fence, depending upon which board was being routed. (I would NOT want to accomplish the miter itself with the router, just the interlocking part of the profile...the miter would have been done on a saw).
I've never had occasion to use one of these bits and would welcome input about their use. Ditto on alternative methods of joining frame to apron.