American window spring
American window spring
US window & door balance springs are constant-force springs specially designed for American double-hung sash windows. Rolled from stainless steel strips with steady tension, they counterbalance sash weight and hold windows securely at any height without dropping or slamming. Corrosion-resistant and compatible with vinyl and aluminum frames. Multiple force ratings are available for new window assembly and aftermarket replacement. Avoid over-stretching to extend service life.
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Products
| Product name | American window spring |
| Materials | Stainless Steel(302/304/316/631/17-7PH), Carbon Steel, Music Wire, Copper, Bronze, Nickle Alloy, Chrom Alloy, Sillion Alloy, Notinol Alloy, Titanium Alloy, Or as customer’s demand. |
| Direction | Right or Left |
| Finish | Zinc plating, Nickel plating, Anodic oxidation, Black oxided, Electrophoresis, Power coating, Gold plating, Silver plating, Tin plating, Paint, Chorme, Phosphate, Dacromet, Oil coating, Copper plating, Sand blasting, Passivation, Polishing, Etc. |
Corrosion Resistance: Made from SUS 304 and 316 stainless steel providing 800 to 1,200 MPa tensile strength, withstanding 200+ hours of salt spray without degradation, ensuring long-term durability in industrial, outdoor, and marine environments where reliability under humidity and chemical exposure is critical.
Precision Engineering: Customizable wire diameters from 0.2 to 8.0mm and free lengths from 3 to 200mm, rapid 5-day prototyping, with ±0.05mm dimensional tolerance, enabling precise OEM specifications, consistent force output, and seamless integration into machinery, household devices, and commercial display systems.
Durability: Double-hook design supports static loads up to 10 kg with 360° rotation, tested through 50,000 operational cycles, providing dependable suspension, secure hanging, and reliable performance for retail displays, mechanical assemblies, and repeated daily-use applications.
Safety Compliance: RoHS-compliant materials with lead content below 0.1%, verified by third-party testing, ensuring suitability for food processing equipment, children’s products, and other applications requiring non-toxic, environmentally safe spring components.
Customizable Performance: Springs offer ±3% force deviation under repeated loading, maintain structural integrity over 50,000 cycles, and can be adjusted in stiffness and length for tailored applications, supporting bulk orders, repeat procurement, and high-volume industrial or commercial projects with minimal maintenance.
