Weld On Hinges
Weld on hinges are small hinges that connect two separate metal parts (typically doors and door frames) while still allowing for up to 180 degrees of swinging movement. They are sometimes also called bullet hinges, barrel hinges, or lift-off hinges. Able to withstand substantial loads, as well as being suitable for narrow frames, heavy duty weld on hinges are excellent alternatives to more traditional hinges, such as butt hinges and piano hinges.
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Applications of Weld On Hinges
Weld on hinges offer high control quality and are often used in heavy duty industrial applications, such as steel cabinets, electrical boxes, steel gates, machinery doors, transformer enclosures, and tool boxes.
Weld on hinges are also used in these industries:
Materials Used in Manufacturing Weld On Hinges
The materials used to make weld on hinges first undergo the extrusion process. In this process, round metal stock called "billets" or "logs" are pressed by a ram through a die, which is a hollow profile that shapes the metal into a specific extruded shape as the billet is squeezed through. The materials are then drilled and cut to the required hinge shape.
Common materials used in the manufacturing of weld on hinges include:
- Stainless Steel
- Zinc-Plated Iron
- Low Carbon Steel
- Aluminum Alloys
Weld On Hinge Design and Function
Weld on hinges are designed as two halves of a hinge that can separately be directly welded onto the surfaces. These halves are referred to as the male and female barrels, which is why weld on hinges are also referred to as weld on barrel hinges or just barrel hinges. The male barrel is the barrel with the pin, and the female barrel is the barrel without a pin. The male barrel is welded onto the structural surface (e.g., a door frame), while the female barrel is welded onto the other surface (e.g., a door).
Since doors that use weld on hinges become lift-off doors, the female barrel must fit on top of the male barrel. This is because lift-off doors are often dropped, and the bottom barrel must have the greater load bearing capabilities of the two. The advantage of lift-off doors is that they can be lifted off of the hinges at any time without the hassle of having to unscrew the hinges.