| Product Name | Tension Spring |
| Material | Stainless steel, carbon steel, music wire, copper,etc |
| Surface Treatment | Nickel/chrome/zinc plating /beryllium copper etc. |
| Sample Time | 5-7days |
| Brand Name | NAHE |
| Wire Diameter | 0.1 50mm |
Custom Stainless Steel Extension Springs – OEM/ODM Solutions for Global Industries
Extension springs are coil springs that withstand axial tension, and they are generally made of materials with a circular cross-section. When no load is applied, the coils of an extension spring are usually tightly wound with no gaps between them. Utilizing the resilience (tension) generated after stretching, they are used to control the movement of parts, store energy, measure force magnitude, and so on, and are widely applied in machinery and instruments. The hook types include side-hook extension springs, long-hook extension springs, British-style hook extension springs, German-style hook extension springs, semi-circular hook extension springs, duckbill hook extension springs, etc. Available materials include stainless steel, piano wire, high-carbon steel, phosphor bronze, beryllium copper, oil-tempered alloy spring steel, and more.
Extension springs can absorb and store energy, and generate a reaction force against tension. Both ends of an extension spring can be fixed to other components. When these components are pulled apart by an external force, the extension spring will generate a force to pull all components back to their original positions. In other words, when these components separate, the extension spring will attempt to bring them back together. Extension springs absorb and store energy while producing tension resistance. The initial tension determines how tightly the extension spring is wound. Specific load requirements for applications can be met by controlling the initial tension. The ends of extension springs are designed with hooks, small holes, or other interface geometries for connecting to components. When stretched from their initial position, they typically provide elasticity for the associated components.
Application Fields
The application fields of extension springs include automotive interior and exterior parts, garage door components, pliers, carburetors, trampolines, washing equipment, agricultural machinery, toys, and thousands of other uses. Extension springs are available in a wide range of sizes, from small medical devices to outdoor mechanical brakes.
Main Design Parameters
Dimensions
Outer diameter, inner diameter, wire diameter, free length, and extended length.
Free length refers to the total length of the spring when it is unloaded.
Extended length refers to the length of the spring when it is in a stretched state.
Spring Stiffness and Load
Spring stiffness refers to the load variation per unit of deformation.
Load refers to the force borne by a spring under tension.
Unit of Measurement