3 Inch Pneumatic Expanding Air Shaft

Product Overview
AstraRoll’s 3 Inch Pneumatic Expanding Air Shaft is designed for reliable roll core gripping in slitting, winding, unwinding, rewinding, and other continuous web handling equipment. The pneumatic expansion mechanism allows the shaft to securely grip the inside of the core during operation and release it quickly when the roll needs to be changed, helping improve handling efficiency and maintain stable torque transmission.

The 3-inch size is widely used with 76.2 mm roll cores in converting and web processing equipment, making it a practical choice for many standard machine configurations. At the same time, AstraRoll does not limit production to a fixed specification. We manufacture air shafts according to the actual machine interface, core dimensions, shaft length, load, torque, and operating requirements.

Non-Standard Air Shaft Manufacturing
Different machines often require different shaft lengths, mounting arrangements, expansion ranges, and load capacities. AstraRoll provides non-standard air shaft manufacturing for equipment manufacturers, machinery integrators, and end users who need a shaft built around their existing or newly designed equipment.

Depending on the application, the shaft can be configured in different diameters and lengths, with available size ranges extending from 1 inch to 12 inches. Materials can also be selected according to the required balance of weight, strength, and operating conditions, including steel and aluminum constructions.

For projects requiring a specific interface or mechanical configuration, our engineering team can work from equipment dimensions, core specifications, drawings, or technical requirements to develop a suitable air shaft solution rather than forcing the application to fit an off-the-shelf model.

Concentric Structure for Stable Operation
A concentric shaft structure helps maintain accurate alignment between the shaft and roll core during rotation. This is particularly important for slitting and rewinding applications where shaft alignment and stable rotation can affect web handling performance.

The pneumatic expanding mechanism provides secure engagement with the core while allowing fast loading and unloading. This makes the shaft suitable for production lines where rolls are frequently changed and reliable core gripping is required throughout continuous operation.

For demanding applications, the shaft can be engineered for torque requirements up to 3600 N, subject to the actual shaft configuration, dimensions, and working conditions.

Factory-Direct Manufacturing and Competitive Pricing
As a source factory, AstraRoll manufactures pneumatic expanding air shafts directly rather than relying on multiple trading intermediaries. This allows us to control machining, assembly, customization, and quality throughout the production process while offering competitive factory-direct pricing.

Whether you need a single replacement shaft, a customized shaft for new equipment, or a batch of air shafts for regular production, we can support different order quantities and specifications. The goal is to provide a practical balance between customization, performance, production consistency, and cost.

Applications

The 3 Inch Pneumatic Expanding Air Shaft is widely suited to:

• Slitting and rewinding machines
• Winding and unwinding equipment
• Printing and converting machinery
• Film and flexible packaging lines
• Paper and label processing
• Coating and laminating equipment
• Aluminum foil and other roll-to-roll material processing
• Lithium battery and electronic material production lines

The shaft configuration can be adapted to different core sizes, web materials, machine widths, roll weights, and operating conditions.

Flexible Configuration for Different Equipment
AstraRoll can customize the shaft diameter, overall length, core compatibility, expanding elements, shaft body material, shaft ends, and other mechanical details according to the application.

Steel construction can be selected where higher structural strength and load capacity are required, while aluminum can provide a lighter rotating assembly for applications where reduced shaft weight is beneficial.

For international shipments, finished air shafts can be packed in fumigated wooden cases with seaworthy packaging to provide suitable protection during long-distance transportation.

Typical Specifications

Product Type: Pneumatic Expanding Air Shaft

Typical Core Size: 3 Inch / 76.2 mm

Available Diameter Range: 1 Inch–12 Inch

Structure: Concentric Shafts

Material: Steel, Aluminum

Torque Capacity: Up to 3600 N, depending on configuration

Length: Customized

Core Compatibility: Customized according to actual core ID

Packaging: Fumigated Wooden Case / Seaworthy Packaging

The above specifications are reference configurations. Actual dimensions and performance can be customized according to the customer’s machine, core, load, torque, and operating requirements.

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.