Enclosure Performance Hinges on Hardware

There are several basic points for a designer to consider when spec'ing hinges for enclosures. Product Manager, Hinges and Positioning Technology, Jim Ford it’s important to identify industry standards (NEMA or IP sealing), load requirements, aesthetics, and environmental conditions early in the design. Taking the time to do so minimizes total product costs and maximizes hardware and enclosure performance. “Concealed versus exposed hardware, internal or external hardware space requirements, corrosion resistance, material preferences and flammability ratings can all influence hinge selection,” says Ford. For example, when concealed hinges are necessary, minor changes to the door and frame in the early stages of design can allow use of a standard product. “This in turn, minimizes product costs while maximizing overall performance,” says Ford. “Internally mounted hinge hardware can also satisfy concerns about appearance as well as minimize vandalism opportunities. Typically they require more space on the inside of the enclosure, which can be a problem in small, tightly packed enclosures.” Externally mounted hinge hardware offers other advantages, says Ford. “They are typically stronger, have more universal fit and there’s greater flexibility for removable hinges. And, it’s also easier to specify them later in the design cycle.” Designers should always specify hinges to accommodate not only the basic door weight, but also the maximum anticipated load on the door, says Ford. “If weighing the door is not an option, it can be calculated by multiplying the height by width by depth and multiplying that by the density of the door material. CAD software can also be used to accurately determine door weight or center of gravity.” To select appropriate hinges, especially in larger door installations, Ford recommends determining both the maximum load and the center of gravity. The center of gravity of a symmetrical door is typically at the center of the door.