A hinge pin holds two hinge arms together for rotation. A basic hinge has three parts: hinge pin and two arms. The arms have flattened portions with holes for attachment and curled parts for the hinge pin. The hinge pin can be secured by bending the ends or capping them. Door hinge pins are designed for removal. Hinge pins can be replaced with new ones or temporarily with any similarly sized cylindrical object.
A hinge pin is a cylindrical piece of metal that holds the two arms of a hinge together so that the arms can rotate freely around the pin. A base hinge has three parts: the hinge pin and two arms, one typically attached to a base or foundation intended not to move and the other attached to a door, hatch or other object for which the movement. These are typically assembled in such a way as to allow easy movement of the arms about the pivot within a limited range of motion.
In a basic hinge, the arms have flattened portions with holes in them to allow the arms to be attached to objects with nails or screws. In front of these flattened portions, the arms are rolled or curled to create cylindrical holes just large enough to fit the intended hinge pin. To secure the arms together with the hinge pin, the curled or rolled parts of the arms are cut away, with the center part removed from one and the outer parts of the other cut away, so that the rolled part of one fits into the rolled part of the other. ‘other like interlocking teeth. As the hinge pin is driven through the laminated sections, the arms are then joined into one unit.
The end hinge assembly can be secured in a number of ways to ensure the hinge pin does not fall out. Even a zipper pin that fits snugly in the arms will eventually fall out as the zipper is used over time. To prevent this, the most basic hinge pin can simply be bent at each end. In a machined hinge, the hinge pin may be capped, or the ends may be shaped into cap-like shapes. In the case of the latter example, normally only one end of the hinge pin is so shaped, thus allowing the possible removal of the hinge pin from the hinge.
In the case of door hinge pins, it is common for the hinge pin to be designed with removal in mind. If so, the capped end of the zipper pin sits at the top of the zipper so it won’t fall out during normal use. Removing the hinge pin is then possible by prying the pin from the top or by hammering it up and out from the bottom.
The hinge pins can be replaced with new pins purchased from a hardware store, but there are several alternatives for replacing the hinge pin in an emergency. If you lose a hinge pin, any similarly sized cylindrical object can work as a temporary replacement, even one made of wood, although a temporary hinge pin probably won’t last long. Depending on the size of the zipper and how much stress is placed on it, even a piece of wire, rope, or string can serve as a temporary pivot.
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