“Premium Roller Shutter Spring Box for Vertical Shutters. Precision Engineered for Commercial Mall Applications.”
Roller Shutter Spring Box: 240mm Galvanized Steel | Steel Bearing | 42mm Bore
| Roller Shutter Spring Box – 220×42×80mm | |
| Usage | Spring Box used for Rolling Shutter Door/Roller Shutter Door/Gate |
| Model Number | 220*42*80(220*42*80mm Iron Bead) |
| Surface Material | Galvanized Iron |
| Outer diameter | 220mm |
| Inner diameter (Tube Diameter) |
42mm or customized accept |
| Width | 80mm |
| Thickness | 1mm*1mm*1.5mm |
| Inner Roller Material | Iron Bead |
| Packing | Nylon Plastic Bag |
■ Application Scenario: Roller Shutter Door
■ Minimum Order Quantity: 1000 pcs
■ Payment Terms: L/C, T/T, Western Union
■ Supply Ability: 20000 pcs /month
■ Delivery Time: 30 days
Technical Specifications:
Model: SH-240*42(Iron Bead Bearing Series)
Dimensions: Ø240mm (Outer) × Ø42mm (Inner) × 80mm Width
Reinforced Construction: Triple-layer galvanized steel
(1.0mm sidewalls + 1.5mm core)
Bearing System: Heavy-duty iron bearing axle
Finish: Original steel color (corrosion-resistant coating)
Door Compatibility: 3-5m width commercial shutters
Outer Diameter: 240mm (±0.5mm tolerance)
Material: Grade SGCC galvanized steel
Bearing Type: Forged steel roller bearing
Load Rating: 150kg vertical operation
Why Choose Our Spring Box?
✅ Industrial-Grade Durability
Our galvanized material undergoes 72-hour salt spray testing,
providing 5X rust resistance compared to standard springs.
✅ Smooth Vertical Operation
Precision-engineered iron bearing core reduces rotational friction by 40%.
✅ Traditional Design Integration
Maintain architectural consistency with classic steel finish.
Value-Added Services:
Custom Manufacturing: OEM/ODM available for bulk orders (MOQ 1000 units)
Certified Packaging: 10pcs/anti-rust paper bag with humidity indicators
Application Scenario:
*”Installed in Guangzhou Grand Mall’s service corridors, SH-240*42 units have operated flawlessly through monsoon seasons since 2022, demonstrating zero corrosion or spring fatigue.” – Facilities Manager Report*
Revised Warranty Statement:
Quality Assurance Commitment:
All spring boxes are covered by our standard warranty against manufacturing defects. Should any material or workmanship issues arise, contact our Guangdong engineering team for technical evaluation and solution support. Specific warranty terms are available upon request with your quotation.
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