This horizontal mortising router jig is a more versatile adaptation of G.R. Livingston’s (Fine Woodworking #22). The jig can be clamped in a vise, but is fully portable and could be clamped to a sawhorse, for example.

The fence is adjustable by means of two bolts and wing nuts, which lets you center the mortise in stock of different thickness. The fence can be locked in pre-set positions (for mortising 3/4-in. stock, for example) with a screw through the fence into the frame behind. My version of the jig is made from plastic-laminate-covered particleboard sold for shelving. I mounted the router on a piece of 1/4-in. birch plywood recessed into the face of the fence.

Charles W, Milburn, Weston, Ont., Canada

Fine Woodworking Magazine, August 1983 No. 41

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