Double Inflatable Flexible Air Differential Shaft

AstraRoll Double Inflatable Flexible Air Differential Shaft

The AstraRoll Double Inflatable Flexible Air Differential Shaft is designed for web handling and roll-to-roll applications that require reliable tension control, flexible core gripping, and efficient roll changes. Its double inflatable structure allows independent air-controlled expansion, enabling the inflatable keys or lugs to conform flexibly to the inner surface of the core while accommodating minor core diameter variations. The differential design allows multiple rolls mounted on the same shaft to run at different speeds and tensions as roll diameter changes, making it suitable for slitting, rewinding, coating, printing, packaging, and the handling of film, paper, nonwoven, foil, tape, and composite materials.

AstraRoll offers customization based on equipment interface, core inner diameter, shaft length, lug arrangement, air bladder specifications, air inlet position, mounting method, and operating speed requirements. The product is engineered with attention to air tightness, repeatable expansion and contraction, dynamic balance, and running stability to support consistent web tension and improved loading and unloading efficiency. Final dimensions, load capacity, core range, and configuration details can be confirmed according to the specific application. AstraRoll provides selection support, drawing confirmation, sampling, and batch supply for customized requirements.

Key attributes

• Product name: Air Differential Shaft
• Torque capacity:  Customized
• Size：1500*85*85MM
• MOQ:  1Pcs
• Material: Metal

AstraRoll Highlights

Metal Construction: Durable and robust design for long-lasting performance.
Customizable Torque Capacity: Tailored to meet specific machinery needs.
Flexible Design: Enhances adaptability in various industrial applications.
1-Year Warranty: Peace of mind with extended coverage for reliability.
Professional Manufacturer: Trustworthy partner with extensive industry experience

Main applications

1. Label stock slitting and rewinding: Suitable for adhesive label stock, liner, and face stock, where tension-sensitive materials can wrinkle or break if tension is uneven.
2. Film slitting and rewinding: Used for BOPP, PET, PE, CPP, PVC, protective film, optical film, and other plastic films. Each slit strip can maintain independent tension as roll diameter increases.
3. Foil slitting: Used for copper foil, aluminum foil, and other thin metal foils, especially where clean roll edges and low-friction tension control are required.
4. Lithium battery separator and electrode processing: Used in battery separator film and related web-handling lines where thin, high-value materials require stable, independent tension.
5. Paper and tape converting: Used in paper slitting, adhesive tape, masking tape, and similar converting lines with multiple rewound rolls on one shaft.
6. Printing, coating, and laminating lines: Used in unwind/rewind sections where multiple webs or strips need consistent tension, especially in gravure, flexo, coating, and laminating equipment.
7. Nonwoven and textile web handling: Used where multiple narrow rolls are rewound and tension differences across the web must be compensated.
8. Specialty web materials: Used for optical film, medical film, food packaging film, release film, and other tension-sensitive materials.

Typical equipment

• Slitting machines
• Rewinders
• Label slitting machines
• Film slitting lines
• Foil slitting machines
• Coating and laminating machines
• Printing press unwind/rewind units
• Battery separator processing lines
• Tape and paper converting machines

Typical working conditions

Air differential shafts are most useful when:

• Multiple rolls are wound on one shaft
• Strip widths or material thickness vary across the web
• Roll diameters increase at different rates
• Material is thin, tension-sensitive, or prone to wrinkling
• Clean roll edges and consistent roll hardness are required
• Frequent roll changes are needed

In short, an air differential shaft is used wherever multiple rolls must be rewound on one shaft with independent tension control - especially in label, film, foil, paper, tape, battery, printing, coating, and laminating applications.

Q1. Are you a trader or direct factory?

We are a direct manufacturing factory with over 20 years of expertise in high-end industrial rollers, casters and material handling solutions. Our facility operates with ISO-certified quality management systems, allowing us to maintain full control over production cycles and quality standards. Throughout two decades of growth, we have established deep, long-term strategic partnerships with several listed companies and global automation leaders, proving our reliability as a high-tier industrial supplier.

Q2. What are your main products?

AstraRoll specializes in the engineering and production of three core product lines: Industrial Rollers, Heavy-Duty Wheels, and Precision Casters. We do not just sell components; we provide integrated movement and transport solutions. Our products are widely utilized across high-demand sectors, including: New Energy, Lithium Battery, Mining, Heavy Industry, Medical Institutional, Agriculture and Logistics.

Q3. What about delivery time?

We deeply understand that project timelines are critical.
Standard Products: Usually dispatched within 7–15 working days if the components are in stock.
Customized/OEM Orders: Depending on the complexity and volume, the lead time typically ranges from 20–35 days. This includes time for technical drawing confirmation, specialized tooling, and rigorous pre-shipment testing.
Shipping Methods: We offer flexible global logistics solutions, including FOB and CIF terms. We ship via Sea Freight (for bulk industrial orders), Air Freight (for urgent project needs), and International Express (DHL/FedEx/TNT) for smaller components or samples.

Q4. How can I get a quote for customized products?

Since a significant portion of our business involves specialized engineering, pricing is tailored to your specific technical requirements. To provide an accurate quote, please provide the following details: Technical Drawings or Sketches, Application Environment, Quantity, Special Requests. Our engineering team typically reviews and responds to custom inquiries with a formal quotation within 24–48 hours.

Q5. What is your payment?

TT / Paypal / Western Union / LC / Credit Card etc. are all available to us.