We offer a variety of hinge types because one hinge does not maximize the efficiency or functionality of every traffic door panel type or application. The jamb thickness determines the degree of swing. Wider jambs will limit the degree of swing with the exception of our unique XLD hinge which will swing 180 degrees in either direction on up to an 8 inch jamb. All of our hinges rely on the force of gravity to return the door to its closed position. A spring may be used to assist in closing, holding a closed position in applications where positive or negative air pressure do not allow the door to return to center or to dampen the swing to reduce damage from jamb contact.

Top Mounted Gravity Hinge - Provides a 120 X 120 (240 total) degree swing pattern on a 4 inch jamb. Our original hinge design which is used exclusively on our Flexible Doors, AirGard, Uni-Flex and EconoClear doors for light to extra-heavy duty applications. The upper bracket uses an offset pivot bar that is welded to a triangular frame arm with a cross brace that is made of solid steel rod stock. This arm is contained in a pocket at the top of the door panel. The hinge has no bottom pivot which allows for the complete use of the opening width. As the door opens the end of the arm rises. The weight of the panel causes the door to return to its closed position.

"C" Style Offset Pivot Gravity Hinge - Provides a 135 X 135 (270 total) degree swing pattern on a 4 inch jamb. A traditional design, it is used on sheet doors, service doors and core doors in light to medium applications. Utilizes a pivot pin welded to a saddle that holds the door panel and a perpendicular axle with two hardened steel roller bearings which ride on a flat plate and drop into a groove to maintain the closed position. This pin is centered about 3.5 inches from the jamb. A similar pin that holds the bottom of the door in place is centered 2 inches from the jamb. This is what is meant by offset. As the door is pushed open, the door panel changes from a completely vertical plane to a slightly angled plane. The weight of the panel - or gravity - causes the door to return to the closed position. Any time that the door is not in the fully closed position, there is only one wheel in contact with the plate. The centering position of the closed door is adjustable. This style of hinge always requires a cutout in the panel. Because gravity plays a large part in the function of these hinges, the heavier and wider a door is, the better they work. We do not use these hinges on doors that are less than 20" wide.

"E" Style Offset Pivot Gravity Hinge - Provides a 135 X 135 (270 total) degree swing pattern on a 4 inch jamb. Also a traditional design, it is used on sheet doors and core doors in light to medium applications and is a preference on restaurant doors. A variation on the "C" hinge which utilizes a similar welded pivot pin and a perpendicular axle with two hardened steel roller bearings that hang down from an L shaped corner bracket. The saddle that holds the door panel is below and parallel to a flat plate that has a hole for the pivot pin to pass through. An inverted groove is used to maintain the closed position. This pin is also centered about 3.5 inches from the jamb. A similar pin that holds the bottom of the door in place is centered 2 inches from the jamb. This hinge functions exactly like the "C" hinge described above. The centering position of the closed door is adjustable. This style of hinge always requires a cutout in the panel. Because of the same gravity issue, the heavier and wider a door is, the better they work. We do not use these hinges on doors that are less than 20" wide.

Durulite V Cam Hinge - Provides a 90 X 90 (180 total) degree swing pattern on a 4 inch jamb. The industry standard V Cam, it is found on our Durulite Standard and Industrial roto-molded doors and it is used for medium to extra-heavy duty applications. This design utilizes a single, offset roller bearing that is fixed to the upper hinge post on the back edge of the door. The roller bearing is held in a notch at the bottom of a zinc-plated, cast ductile iron or stainless steel cam. As the door opens, the roller bearing travels on a rising, circular path and relies on the weight of the door to return to its closed position. The bottom hinge post is held in place by a pillow block or hinge guard. The back of the door panel requires a notch at both the top and bottom for the hinge components. The door panel is attached to these in-line hinge posts.

Durulite Offset V Cam Hinge - Provides a 90 X 180 (270 total) degree swing pattern on a 4 inch jamb. An alternative hinge for our Durulite Standard and Industrial roto-molded doors, it is used for medium to extra heavy duty applications. Similar to the standard Durulite V Cam, this design mounts on the corner rather than the flat of the jamb face giving additional swing clearance in one direction. It also utilizes a single, offset roller bearing that is fixed to the upper hinge post on the back edge of the door. The roller bearing is held in a notch at the bottom of the zinc-plated, cast ductile iron or stainless steel cam. As the door opens, the roller bearing travels on a rising, circular path and relies on the weight of the door to return to its closed position. The bottom hinge post is held in place by a corner mounted pillow block or hinge guard.

Durulite Low Rise V Cam Hinge - Provides a 90 X 90 (180 total) degree swing pattern on a 4 inch jamb. Another alternative hinge for our Durulite Retailer roto-molded doors, it is used for medium duty applications. This design utilizes a single offset roller bearing that is fixed to the upper hinge post on the back edge of the door. The roller bearing is held in a notch at the bottom of the zinc-plated, cast ductile iron or stainless steel cam. As the door opens, the roller bearing travels on a rising, circular path and relies on the weight of the door to return to its closed position. By reducing the angle of the rising path, this hinge requires less opening force making the door easier to open. The bottom hinge post is held in place by a pillow block or hinge guard. The back of the door panel requires a notch at both the top and bottom for the hinge components. The door panel is attached to these in-line hinge posts.

Durulite Composite V Cam Hinge - Provides a 105 X 105 (210 total) degree swing pattern on a 4 inch jamb. Found only on our Durulite Retailer roto-molded doors, it is used for medium duty applications. This design also utilizes a single, offset roller bearing that is fixed to the upper hinge post on the back edge of the door. The roller bearing is held in a notch at the bottom of a composite, non-corrosive cam. A stainless steel back plate bracket behind the hinge attaches to both the header and jamb. As the door opens, the roller bearing travels on a rising, circular path and relies on the weight of the door to return to its closed position. The bottom hinge post is held in place by a pillow block or hinge guard. The back of the door panel requires a notch at both the top and bottom for the hinge components. The door panel is attached to these in-line hinge posts.

Proline V Cam Hinge - 110 X 110 (220 total) degree swing pattern on a four inch jamb. Used on OSB core and insulated doors for medium to heavy duty applications. This design utilizes a single, offset roller bearing that is fixed to the upper hinge post or back spine on the back edge of the door. The roller bearing is held in a notch at the bottom of the zinc-plated, cast ductile iron cam. Above the cam the one piece casting folds over 90 degrees so the entire cam assembly can be attached to both the jamb and header. As the door opens, the roller bearing travels on a rising, circular path and relies on the weight of the door to return to its closed position. The bottom hinge post or back spine is held in place by a hinge guard. The back of the door panel requires a notch at both the top and bottom for the hinge components. The door panel is attached to the in-line back spine or hinge posts.

XLP In-line Cam Hinge - Provides a 135 X 135 (270 total) degree swing pattern on a 4 inch jamb. Used on hollow, sheet, core and gate doors, light to medium duty applications. This is an in-line cam hinge, which means that the pivot point at both the top and bottom are the same 2 inch distance from the jamb. All hinge components are hidden inside of an extruded aluminum back spine. There are no cutouts in the panel except when a jamb guard is used. A bottom L bracket holds a cam which serves both as a pivot pin. It has three set screws for its centering adjustment. Above the cam pin inside of the bottom of the spine is a fixed mating cam. In the upper part of the spine there is a plug below a tempered coil spring. Above the spring is the top L bracket with a bushing on a pin. During operation, the spine and lower mating cam inside rotate on the pivot cam which causes the panel to rise. As it rises, the plug in the upper part of the spine causes the spring to compress against the bushing on the top L bracket. The spring expansion assists gravity, forcing the door to lower itself back to the closed position and center as the two lower cams are mated back in place. The attachment of the hinge to the panel is made with the spine. Because this hinge is inline and spring assisted, the weight and size of the panel is not critical and does not have any limitations on minimum size.

XLS In-line Cam Hinge - Provides a 135 X 135 (270 total) degree swing pattern on a 4 inch jamb. It is only available on the Durulite Evolution roto-molded panel for medium to heavy duty applications. This is a larger, heavier version of the XLP in-line cam hinge described above. The pivot point at both the top and bottom are the same 2 inch distance from the jamb. All hinge components are hidden inside of a larger extruded aluminum back spine. There are no cutouts in the panel even when a jamb guard is used. A bottom jamb guard holds a cam which serves both as a pivot pin. It also has three set screws for its centering adjustment. Above the cam pin inside of the bottom of the spine is the fixed mating cam. In the upper part of the spine there is a plug below a heavy, tempered coil spring. Above the spring is the top L bracket with a bushing on a pin. During operation, the spine and lower mating cam inside rotate on the pivot cam which causes the panel to rise. As it rises, the plug in the upper part of the spine causes the spring to compress against the bushing on the top L bracket. The spring expansion assists gravity, forcing the door to lower itself back to the closed position and center as the two lower cams are mated back in place. The attachment of the hinge to the panel is made with the spine.

XLD Dual In-line Cam Hinge - Provides a 180 X 180 (360 total) degree swing pattern on up to an 8 inch jamb. It is only available on the Durulite Evolution roto-molded panel for medium to heavy duty applications. This is a dual version of the XLS in-line cam hinge. All hinge components are hidden inside of two extruded aluminum back spines. There are no cutouts in the panel except when a jamb guard is used. The bottom L and connector brackets each hold cams which serve as pivot pins. Each has three set screws for its centering adjustment. Above the cam pin inside of the bottom of each spine is a fixed mating cam. In the upper part of the spines there are fixed plugs below a tempered coil spring. Above the spring is the top L bracket with a bushing on a pin. During operation, the spine and lower mating cam inside rotate on the pivot cam which causes the panel to rise. As it rises, the plug in the upper part of the spine causes the spring to compress against the bushing on the top L bracket. The spring expansion assists gravity, forcing the door to lower itself back to the closed position and center as the two lower cams are mated back in place. The attachment of the hinge to the panel is made with the spine. Because this hinge is inline and spring assisted, the weight and size of the panel is not critical and does not have any limitations on minimum size.