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Custom Constant Force Flat Spring for Cordless Blinds
Custom Roller Shade flat Springs – Precision Constant Force for Cordless Window Coverings
Are you searching for a reliable supplier of roller shade springs? Whether you manufacture cordless blinds, roller shades, or smart window coverings, the right spring mechanism ensures smooth operation, precise positioning, and long-lasting performance.
At Dongguan Seme Precision Hardware Co., Ltd. , we specialize in designing and manufacturing high-performance constant force springs for roller shades. Our springs are engineered to provide consistent tension, allowing shades to stop at any position without slipping or bouncing. From S-shaped constant force springs to variable force spring systems, we provide end-to-end OEM and ODM services for window covering brands worldwide.
Why Roller Shade Manufacturers Choose Seme Hardware
Feature Benefit
Precise Positioning | Our variable force springs ensure positioning accuracy within 2mm, allowing shades to stop exactly where users want |
Long Service Life | Engineered for 10,000+ operating cycles with force decay below 5% |
Cordless Safety | Eliminates traditional pull cords, making shades safe for homes with children and pets |
Smooth Operation | Consistent force output ensures quiet, effortless raising and lowering |
Compact Design | Springs fit inside standard roller tubes, maintaining clean aesthetics |
Types of Roller Shade Springs We Manufacture
Spring Type Application Key Features
Constant Force Springs | Cordless roller shades, zebra blinds | Flat spiral design, consistent torque, space-saving |
S-Shaped Constant Force Springs | High-end cordless shades | Dual-roll design, standardized structure, lower assembly cost |
Variable Force Springs | Heavy-duty roller shades | Progressive tension, ideal for larger windows |
Torsion Springs | Traditional roller blinds | Coiled wire design, reliable return force |
Technical Specifications (Customizable) Parameter Material Options
Material | Stainless Steel (SUS301, SUS304), High Carbon Spring Steel |
Thickness | 0.1mm – 0.5mm (custom) |
Width | 5mm – 30mm (custom) |
Length | 500mm – 3000mm (custom) |
Inner Diameter | 16mm – 35mm (custom) |
Force Output | 1N – 50N (custom) |
Surface Treatment | Zinc Plated, Passivation, Electrophoresis |
Life Cycles | 10,000 – 50,000+ cycles |
Applications
Cordless roller shades
Zebra blinds (day & night shades)
Blackout roller blinds
Solar shades
Smart motorized blinds (spring-assist)
Commercial window coverings
RV and marine shades
Why Partner with Dongguan Seme Precision Hardware Co., Ltd.？
Engineering Expertise – 10+ years of experience in precision spring manufacturing for window covering applications
Customization Ready – Full customization based on your drawings or samples, including dimensions, force, and material
Quality Assurance – Strict quality control ensures consistent performance batch after batch
Fast Sample Turnaround – Receive custom prototypes in 7–10 days
Competitive OEM Pricing – Factory direct with flexible MOQ
How to Order Custom Roller Shade Springs
Send us your requirements – Provide drawings, samples, or technical specifications
Engineering review – Our team confirms material, dimensions, and force requirements
Sample production – We manufacture and deliver prototypes for testing
Mass production – Upon approval, we proceed with bulk manufacturing and on-time delivery
Request a Free Quote Today
Ready to upgrade your roller shade supply chain？
Contact Dongguan Seme Precision Hardware Co., Ltd. today to discuss your custom spring project. Our engineering team is ready to provide a free consultation and competitive quote.
📧 Email: [email protected]
🌐 Website: https://www.semehardware.com
📞 Phone: +0086 186 6511 1545
