Is there a shortcut to cutting a pivot-hinge mortis?
Routing or chiseling out the angled mortise for a semi-concealed pivot hinge on a cabinet door takes time and requires a steady hand. But the tablesaw jig shown above turns this into a quick and simple operation.
To build the jig, start by cutting out the two uprights from 1⁄4 " hardwood, plywood, or some other stock that fits into your miter-gauge slot without wobbling or binding. Notch the rear of the uprights to accept the spacer, as shown at top, and glue and screw the spacer to the uprights.
Next, cut the top of the jig from 3⁄4 " particleboard or plywood and make it big enough to hold the length and width of the cabinet door. Glue and screw the top to the uprights and attach the lip to the front as shown in the drawing. Now, put a scrap piece on the jig and make a few test cuts. Vary the height of the blade until you get a mortise that fits the hinge.
—Bob Colpetzer, Clinton, Tennessee