Here is a router jig for trimming edge moldings flush with a flat surface. I have used this jig for trimming the edging on tables and countertops, but its most useful role is trimming solid-wood edging on plywood to be used as adjustable shelves for bookcases.

The jig consists of two wood blocks screwed to a hardwood router sub-base. A 3/4-in.-dia. flat-bottom router bit is set to cut flush with the 1/2-in.-thick block that rides on the surface of the plywood shelf. A 2-in.-thick block acts as a guide to run along the front of the shelf edging. Run the router over each face of the shelf to trim the edging flush with the plywood surface.

To save time when edging the shelves, I rip a 7/8-in.-wide, solid-wood strip that’s about 1/8 in. thicker than the plywood. Then, I glue up a sandwich with the solid-wood strip between two of the shelves. You don’t have to be very precise in aligning the edging and plywood because the extra 1/8-in. thickness will be trimmed off later. When the glue has cured, rip through the center of the edging stock on the tablesaw to separate the shelves, and then joint the face of the edging strips. To complete the shelves, attach the edging jig to the router and set the bit for a flush cut.

Lynn Mickelson, Seattle, Wash.

Fine Woodworking Magazine, February 1990 No. 80

Fine Woodworking Recommended Products

DeWalt 735X Planer

At high speed, the planer works fast and leaves a smooth surface. But the slower, finish speed produces an almost glass-smooth surface. Knife changes are easy.

Buy at Amazon

Bessey K-Body Parallel-Jaw Clamp

The 3 3/4" deep parallel jaws allow for all types of clamping, from thin panels to joinery.

Buy at Amazon

Bessey EKH Trigger Clamps

Bessey EKH series quick-release trigger-style clamps are simple to use and maintain consistent pressure. Trigger clamps that perform the way you've always wished they would!

Buy at Amazon