(Covered In ANSI/BHMA Standard A156.1)

Bearings.

Anti-Friction Bearing. Bearing material between the various moving parts of a hinge

Plain Bearing (non-bearing). When no bearing material is between the various moving parts of a binge.

Butt Hinge. (see Full Mortise Hinge)

Full Mortise Hinge. A hinge having one leaf mortised into the edge of a door and the other leaf mortised into the rabbet edge of a frame.

Full Surface Hinge. A hinge having one leaf attached to the face of a door and the other leaf attached to the face of a door frame.

Half Mortise Hinge. A hinge having one leaf mortised into the edge of a door and the other leaf attached to the face of a door frame.

Half Surface Hinge. A hinge having one leaf attached to the face of a door and the other leaf mortised into the rabbet edge of a door frame.

Hospital Tips. When the ends of a hinge barrel are sloped.

Maximum Security Pin. A hinge pin that cannot be removed when once installed.

Non-Removable Pin. A hinge pin secured by a set screw or other means.

Olive Knuckle Hinge. A pivot hinge with a joint shaped like an olive.

Pivot Hinge. A hinge with a fixed pin and a single joint having a height less than the adjacent hinge leaves.

Raised Barrel. A full mortise hinge having an offset barrel.

Safety Stud. A projecting member on one surface of a full mortise hinge leaf that engages a hole in the opposite leaf when the door is closed.

Slide-In Hinge. A hinge where one or both leaves slide into a cavity prepared in a door or door frame, thus concealing one or both hinge leaves.

Swaging. Offsetting a hinge leaf at the barrel so the surface of the leaf is not tangent to the outer diameter of the barrel.

Swing Clear Hinge. A hinge that swings a door completely clear of the opening when the door is opened 90 to 95 degrees.