Swaging is a slight offset of the hinge leaf at the barrel which permits the leaves to close to parallel position as the door closes. Standard swaging of standard weight and heavy weight full mortise hinges when closed to the parallel position provides a 1/16” clearance between leaves.

What is a non swaged hinge?

A swaged hinge is bent so that when both leaves are closed the touch from the front edge to the barrel. No gap. The issue with non swaged hinges, which by the way were used extensively in period shops, is that one of the mortises has to be formed like a ramp. The ramp will accept this gap at the barrel.

What are the four main types of hinge?

Mounting Hinges Most types of hinges are installed in four mortise, or shallow cut, configurations: full-mortise, half-mortise, full-surface and half-surface. Full-mortise installations have one leaf cut into the door jamb and one into the edge of the door.