Custom differential slip air shaft
Product Overview:
AstraRoll air differential shafts are designed for slitting and rewinding lines where multiple rolls are wound on the same shaft. Each slip ring or friction ring can slip independently, allowing every strip to maintain its own tension as roll diameter grows. This helps prevent loose rolls, telescoping, edge stagger, and material breakage caused by uneven thickness or width across the web.
The shaft is built to customer drawings and matched to the machine interface, core size, web width, and tension range.
Roll Function: Printing Roller
Industry Applications: Packaging
Inquiry Email: sales@astraroll.com
Custom differential slip air shaft Details
When a slitting line rewinds several strips on one shaft, small differences in material thickness or strip width can quickly turn into loose rolls, telescoping, or broken web. AstraRoll's air differential shaft addresses this by giving each roll its own slip point. Instead of one fixed grip across the full width, the shaft carries individual friction rings that can slip independently under air pressure, so every strip keeps its own tension as the roll diameter grows. The result is cleaner roll edges, fewer changeover problems, and more consistent rewinding across the full web. Each shaft is machined to the customer’s drawing and matched to the core size, web width, ring layout, and machine interface, with compatible slip rings supplied as part of the same system.
Working Principle
The main shaft rotates at a constant speed, setting the web line speed. Each slip ring carries one roll. When a roll grows faster in diameter - due to slightly thicker material or a narrower strip - its pulling force increases. Once that force exceeds the set torque, the slip ring slips and rotates slower than the main shaft, matching the incoming web speed. Normal rolls continue rotating with the shaft.
Result: different roll RPM, same web line speed, all rolls finish together without breakage or wrinkling.
Key Features
- Independent tension per roll - each slip ring adjusts its own slip torque
- Air pressure controlled - tension setting via air pressure for repeatable operation
- Fast roll loading and unloading - deflate to release, inflate to grip
- Suitable for multi-roll slitting - film, foil, paper, label stock, nonwoven, and similar webs
- Custom-built - shaft length, core inner diameter, ring quantity, spacing, and journal interface to customer drawing
- Matched slip rings available - keyed, ball, or roller type depending on material and core
Slip Ring Options
| Slip Ring Type | Grip Method | Best For |
|---|---|---|
| Keyed slip ring | Surface contact via retractable keys | Thick material, high tension, paper cores |
| Ball slip ring | Point contact via small steel balls | Narrow slitting, frequent loading, slightly deformed cores |
| Roller slip ring | Line contact + point contact | Thin film, tension-sensitive webs, plastic or aluminum cores |
Typical Applications
- Label stock slitting and rewinding
- BOPP, PET, PE, CPP film slitting
- Protective film and optical film
- Copper foil and aluminum foil slitting
- Lithium battery separator film
- Paper and adhesive tape converting
- Printing, coating, and laminating lines with multi-roll rewinding
Customization Information Required
To quote and manufacture accurately, AstraRoll typically needs:
- Shaft drawing or sketch - overall length, journal, keyway, air inlet
- Core inner diameter and tolerance
- Maximum roll weight and roll diameter
- Web width and narrowest strip width
- Line speed and tension range
- Number of slip rings and spacing
- Air supply pressure and connection
- Loading method and operating environment
Why AstraRoll
- Custom machining to customer drawings
- Slip ring and shaft supplied as a matched system
- Experience with film, foil, paper, label, and battery applications
- Export-ready wooden case packaging
- Practical selection support based on actual line conditions
Need a differential air shaft for your slitting line? Send AstraRoll your drawing, web width, strip width range, roll weight, and line speed. Our team will recommend a slip ring configuration and confirm the manufacturing details.
Contact AstraRoll for a custom air differential shaft quotation.
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.
