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Rolling Door Reel
QS Pipe: Rolling Door Reel
Name: Rolling Door Reel
Material: Carbon Steel
Size: 4 Inch
Length: 3000 mm
Application: For Roller Shutter
Customized Service: Yes
Price: USD 18
Delivery: 7-15 Day
Material: Carbon Steel
Size: 4 Inch
Length: 3000 mm
Application: For Roller Shutter
Customized Service: Yes
Price: USD 18
Delivery: 7-15 Day
Quantity
Designed specifically for industrial and commercial rolling door systems, this Rolling Door Reel is manufactured from high-quality carbon steel. One end connects to the motor, while the other end is welded to a central shaft and mounted on bearings. With an outer diameter of 4 inches (approx. 114.3 mm) and a standard length of 3,000 mm, it strikes an optimal balance between torsional rigidity and lightweight adaptability. The surface is anti-rust treated, and the design is compatible with standard spring brackets and end fittings, ensuring smooth, low-noise operation. Custom lengths and surface treatments are available upon request, with a lead time of just 7–15 days. Priced at only USD 18 per unit, it offers exceptional cost-effectiveness and reliability.
I. Product Positioning & Core Value
This product is a critical load-bearing component for commercial and industrial rolling door systems – the Rolling Door Reel (also known as a winding tube or roller barrel). It performs three key functions: door curtain take-up and pay-out, torque transmission, and long-term static load support. As the primary stressed component in door operation, its material, dimensions, and machining precision directly determine the service life and safety of the entire rolling door.
This product is a critical load-bearing component for commercial and industrial rolling door systems – the Rolling Door Reel (also known as a winding tube or roller barrel). It performs three key functions: door curtain take-up and pay-out, torque transmission, and long-term static load support. As the primary stressed component in door operation, its material, dimensions, and machining precision directly determine the service life and safety of the entire rolling door.
Our 4-inch (approx. 114.3 mm OD) × 3000 mm carbon steel Rolling Door Reel is not simply a cut steel tube – it is the result of design optimization based on finite element stress analysis. While ensuring sufficient capacity to support door areas of 30–50 m² (depending on curtain material), it maintains deflection within permissible limits, guaranteeing smooth, jam-free door movement.
II. Core Functions & Technical Advantages
1. Power Transmission Hub – The inner wall of the Rolling Door Reel is pre-fitted with keyways or welded drive flats, enabling seamless integration with tubular motors or chain-drive systems. The motor drives the reel's rotation, which moves the curtain along the guides for rapid opening and closing.
1. Power Transmission Hub – The inner wall of the Rolling Door Reel is pre-fitted with keyways or welded drive flats, enabling seamless integration with tubular motors or chain-drive systems. The motor drives the reel's rotation, which moves the curtain along the guides for rapid opening and closing.
2. Torsion Spring Carrier – The Rolling Door Reel houses the balancing torsion spring assembly inside. Manufactured from Q235B high-quality carbon steel with a carefully calculated wall thickness (standard ≥ 2.0 mm, with thicker options available), it reliably withstands long-term alternating stresses from the spring without plastic deformation or fatigue fracture.
3. Structural Rigidity Assurance – With an effective length of 3,000 mm, it covers the majority of standard single-door widths (e.g., 3-meter openings). The double-end concentric turning process ensures coaxiality between the end journals and the reel body of ≤ 0.3 mm, fundamentally eliminating eccentric oscillation during operation and significantly reducing abnormal wear on bearings and tracks.
4. Corrosion-Resistant Foundation – The surface undergoes phosphating + electrostatic powder coating (with galvanizing or spray painting options available upon request), achieving over 240 hours in salt spray testing. This makes it suitable for humid, dusty, or mildly acidic/alkaline industrial environments. Every Rolling Door Reel is subject to strict factory quality inspection to ensure batch-to-batch consistency.
III. Typical Application Scenarios
- Industrial Plants & Logistics Warehouses – High-frequency fast-rolling doors or fire-rated rolling doors, subject to vibrational impacts from forklift traffic, demanding exceptional fatigue toughness from the Rolling Door Reel.
- Industrial Plants & Logistics Warehouses – High-frequency fast-rolling doors or fire-rated rolling doors, subject to vibrational impacts from forklift traffic, demanding exceptional fatigue toughness from the Rolling Door Reel.
- Street-Facing Shops & Underground Garages – As the core structural backbone for storefront rolling grilles or garage emergency access doors, requiring smooth surfaces and quiet operation. Our Rolling Door Reel's surface treatment effectively reduces friction-induced operating noise.
- Special-Purpose Protective Environments – Such as cleanrooms or cold storage doors, where the Rolling Door Reel can be paired with stainless steel end brackets; the carbon steel body, combined with specialized coatings, ensures long-term stable operation under clean or low-temperature conditions.
IV. Customization Services & Delivery Capability
We understand that door dimensions and load requirements are never one-size-fits-all. Therefore, in addition to the standard 3-meter length, we support custom lengths from 1.5 to 6 meters, and can machine end journal shapes (square, round, hexagonal) and diameters according to your drawings. We also accommodate requests for increased wall thickness or material upgrades (e.g., galvanized steel winding tubes). All non-standard Rolling Door Reels are produced under the same rigorous quality control system.
We understand that door dimensions and load requirements are never one-size-fits-all. Therefore, in addition to the standard 3-meter length, we support custom lengths from 1.5 to 6 meters, and can machine end journal shapes (square, round, hexagonal) and diameters according to your drawings. We also accommodate requests for increased wall thickness or material upgrades (e.g., galvanized steel winding tubes). All non-standard Rolling Door Reels are produced under the same rigorous quality control system.
Price & Lead Time: Only USD 18 per standard unit, with a rapid 7–15 day delivery. Small trial orders are welcome.
Choosing us means more than just buying a steel tube – you gain a rolling door operational assurance solution backed by mechanical verification and stringent process control. Every door you install deserves a reliable Rolling Door Reel.
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