Aluminum alloy shaft

high strength steeldifferential rewindexpandable

Product Overview
Also known as Ball Type Differential Air Shaft, Pneumatic Differential Shaft, or Slip Differential Shaft, this product is designed for precision slitting and rewinding applications. Solves uneven tension issues in multi-roll slitting and rewinding applications by providing independent tension control for each rewind core, ensuring consistent winding quality and reducing material waste. Uses advanced pneumatic friction ring technology where each friction ring can slip independently to compensate for web thickness variations and maintain uniform web tension across rolls.

How Ball Type Differential Shafts Work
A Ball Type Differential Shaft uses independently controlled friction rings mounted on the shaft body. Pneumatic pressure activates steel balls inside each friction ring, generating controlled slip torque during the rewinding process. When differences in material thickness, winding tension, or roll diameter occur, each friction ring automatically compensates by slipping independently, ensuring equal web tension across every rewind core. Compared with conventional air shafts, ball type differential shafts offer more precise tension control, making them ideal for narrow web slitting and lightweight materials.

Applications

• Film slitting and rewinding
• Label converting
• Paper rewinding
• Aluminum foil slitting
• Copper foil processing
• Flexible packaging production
• Lithium battery film manufacturing
• Optical film converting
• Nonwoven fabric processing
• Laminating and coating lines

Common materials

• PET film
• BOPP film
• CPP film
• PE film
• PVC film
• Aluminum foil
• Copper foil
• Release liner
• Paper
• Label stock
• Nonwoven fabrics

Technical Specifications (summary)
Item: Product Type — Specification: Ball Type Differential Shaft
Item: Expansion Method — Specification: Pneumatic
Item: Core Size — Specification: 3 Inch / 6 Inch
Item: Friction Ring Width — Specification: 25mm, 30mm, 35mm, 40mm, 45mm, 50mm
Item: Shaft Material — Specification: High Strength Steel or Aluminum Alloy
Item: Shaft Length — Specification: Customized
Item: Slip Torque — Specification: Adjustable
Item: Application — Specification: Slitting and Rewinding Machines
Item: Operating Mode — Specification: Independent Differential Tension Control
Item: Surface Treatment — Specification: Precision Machining
Item: Balance Treatment — Specification: Dynamic Balancing
Item: OEM / ODM — Specification: Supported

Benefits of Pneumatic Differential Shafts

• Independent tension control for each rewind core
• Automatic compensation for web thickness variations
• Improved roll winding consistency
• Reduced wrinkles and telescoping
• Stable slip torque during high-speed operation
• Lower material waste and production losses
• Suitable for narrow web and lightweight materials
• Long service life with minimal maintenance
• Excellent performance in precision slitting applications

Why Choose XW Machinery (product-related advantages)

• 13+ years of manufacturing experience
• ISO9001 certified production system
• Professional engineering support
• Customized shaft diameters and lengths
• Dynamic balancing treatment for stable high-speed operation
• Factory-direct pricing
• Fast production and delivery
• OEM and ODM manufacturing support
• Export experience serving customers worldwide

Material Advantages

• Manufactured from seamless steel tubes or high-strength aluminum alloy profiles
• High rigidity and excellent wear resistance
• Resistant to deformation during long-term operation
• Suitable for continuous industrial production environments

Ordering Process (overview)

• Step 1 – Inquiry: provide required shaft parameters (core size, shaft diameter, shaft length, material type, application details)
• Step 2 – Drawing confirmation: engineering team will provide or confirm technical drawings
• Step 3 – Quotation: factory-direct pricing based on specifications
• Step 4 – Production: typical production lead time 7–15 working days
• Step 5 – Quality inspection: products inspected according to ISO9001 standards before shipment

Caractéristiques / spécifications techniques

• Product Type: Ball Type Differential Shaft
• Expansion Method: Pneumatic
• Core Size: 3 Inch / 6 Inch
• Friction Ring Width: 25mm, 30mm, 35mm, 40mm, 45mm, 50mm
• Shaft Material: High Strength Steel or Aluminum Alloy
• Shaft Length: Customized
• Slip Torque: Adjustable
• Application: Slitting and Rewinding Machines
• Operating Mode: Independent Differential Tension Control
• Surface Treatment: Precision Machining
• Balance Treatment: Dynamic Balancing
• OEM / ODM: Supported