- ENGLISH
• Modular
• LoW-SKU
• Easy Assembly
• Stable Force
• Low-Noise Long Lifecycle
• Patent Protect
The DOSRON custom window blind clutch systems are designed for OEM brands that need a stable, modular platform for roller blinds. Using a high-precision gear train, POM / reinforced nylon housings and steel drive shafts, these clutches deliver smooth lifting, quiet operation and secure holding across a wide size range. With modules for Ø25 / Ø28 / Ø32 / Ø38 mm tubes, multiple gear ratios and plastic or metal chains, they adapt easily to residential, commercial and hospitality projects. Paired with DOSRON cordless spring units and battery tubular motors, they help build a scalable, safety-first blind portfolio.
The DOSRON 38mm Cordless Manual Roller Blinds Spring Lift Mechanism is designed for effortless and quiet operation, perfect for bedroom installations. Featuring a constant-force spring and precision-engineered components, this mechanism provides smooth and stable lifting without cords, ensuring child safety and a cleaner look. Its whisper-quiet performance (below 40dB) and extended durability make it an ideal solution for modern homes and offices, with over 50,000 lift cycles tested for reliability.
The DOSRON Spring Loaded blackout system is a cordless in-tube mechanism designed for cordless roller blinds in classrooms, training rooms, and lecture halls. Integrated inside a 32mm aluminum tube, it uses a constant-force spring to balance fabric weight, allowing for smooth operation without chains or hanging cords. Teachers and students can easily pull the bottom bar to adjust the blinds, ensuring privacy for exams and presentations. The system is engineered for durability, quiet operation, and consistent performance, making it a reliable solution for modern educational environments.
The DOSRON R38 Spring Loaded Mechanism is a high-capacity in-tube spring system engineered for 38 mm cordless roller blinds and zebra blinds. Using dedicated 38RB and 38ZB spring variants, it delivers stable torque, smooth lifting, and quiet operation even with heavier fabrics and wide window spans. Its unified 38 mm platform allows OEM brands to support both manual cordless and motor-ready designs with minimal engineering changes, making it an ideal foundation for modern residential and commercial blind programs.
The R38 Spring Assisted Cordless Lift System for roller shades provides smooth, quiet operation with no cords. Ideal for 38mm tubes, this child-safe, durable system offers effortless lifting, ensuring convenience and safety for residential and commercial spaces.
This product detail explains how the DOSRON Dual-Mode Motorization Kit upgrades classic cordless spring-lift roller blinds into smart-ready systems. It details the in-tube motor and spring layout, compares 32 mm and 38 mm configurations, and outlines installation, safety and acoustic benefits so OEM brands can design quiet, child-safe blinds with both manual and motorized control in one platform.
The Spring Motor Roller Blinds Control System from DOSRON integrates a 38 mm spring-assist core with a compact drive to deliver smooth, quiet, and cordless operation. A 301 stainless steel spiral spring and POM housing stabilize torque for reliable hold-at-any-position performance, while the motor enables precise up/stop/down scenes with minimal power draw. The modular design fits roller and zebra headrails, reduces wiring complexity, and lowers lifecycle maintenance. Ideal for bedrooms, offices, and hospitality spaces, this system combines child-safe architecture with OEM/ODM adaptability—supporting variable fabric masses, bottom-rail options, and regional specifications for modern, high-quality interiors.
DOSRON’s R32 Cordless Spring Mechanism is a compact Ø32 solution for roller shades and zebra blinds. Using POM engineering plastic, zinc-alloy die castings and a 301 stainless-steel spiral spring, it delivers smooth hover-anywhere motion, low noise and long cycle life. The modular design supports OEM / ODM torque tuning, fits narrow cassettes, and helps brands offer child-safe, energy-free cordless blinds.
The DOSRON 38mm Quiet Smooth Cordless Spring Mechanism delivers exceptional balance, silence, and reliability. Engineered for roller blinds and office shading systems, it ensures stable torque, smooth lifting, and low-noise performance through its precision-balanced spring structure. Built for modern commercial and residential interiors, this cordless mechanism offers effortless operation, enhanced safety, and long-term durability — making it the ideal solution for noise-sensitive and high-efficiency environments.
1. Cordless, manual operation, safe, convenient
2. energy saving, environmental protection, quiet.
3. Free hovering and stopping at any position at will.
4. Smooth hand feeling
Item No :
32mm
Order(MOQ) :
100pcs
Payment :
T/T, Credit Card, etc
Product Origin :
China
Color :
Customized
Shipping Port :
Xiamen
Lead Time :
30 days
Weight :
Customized
R38 Customized Cordless Spring Systems are engineered for zebra and cellular blinds to deliver smooth, balanced, ultra-quiet lifting with a fully cordless design. Using a precision spiral spring inside a durable POM housing with a 301 stainless-steel spring, the R38 platform maintains consistent torque and long service life across daily cycles. The result is a maintenance-free, energy-efficient mechanism that keeps stripes aligned, improves safety, and integrates cleanly into modern headrails. Choose R38 Customized Manual Spring Systems when you need OEM-tunable torque curves, reliable hovering, and premium interior aesthetics.
The DOSRON R Series Cordless Spring Mechanism for Roller Blinds, available in Ø32 and Ø38 modules, uses a precision-engineered spiral spring to deliver smooth, balanced, and silent lifting—without external cords. A durable POM housing and 301 stainless-steel spring ensure consistent torque, long cycle life, and reliable hovering across light-to-heavy roller fabrics. Child-safe, maintenance-free, and energy-efficient, this compact mechanism preserves clean façades while elevating usability and aesthetics in modern residential and light-commercial roller shade systems.
If you are interested in our solutions, please leave us a message. Let us provide a complete solution tailored to your specific situation.
No. This system is engineered for manual cordless zebra blinds. Hybrid motor-spring platforms use different control logic.
It depends on measured fabric + bottom rail weight and required drop. Use the selection table to choose model and quantity per Shaft.
Pre-winding stores initial energy so the system enters the intended force band immediately. The Pin locks the pre-tension state.
Not reliably. The Spring Box defines the force band; the Brake only governs motion within it. Correct selection comes first.
Yes, but only with proper load calculations to keep force distribution stable across the full travel.
Dosron designs high-performance spring systems and motors for cordless blinds.
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E-Mail: Aaron@dosroninc.com
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