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Overview This Ball Type Differential Shaft (also called Ball Type Differential Air Shaft, Pneumatic Differential Shaft, Slip Differential Shaft) is designed for precision slitting and rewinding applications. It provides independent tension control for each rewind core, ensuring consistent winding quality and reducing material waste. Using advanced pneumatic friction ring technology, each friction ring can slip independently to compensate for web thickness variations, maintaining uniform web tension and preventing wrinkles, telescoping, loose winding, and roll deformation. Suitable materials include film, paper, foil, labels, flexible packaging materials, optical films, lithium battery separator films, and nonwoven fabrics.

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, equalizing web tension across every rewind core. Compared with conventional air shafts, ball type differential shafts offer more precise tension control, ideal for narrow web slitting and lightweight materials requiring accurate winding performance.

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

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

Technical Specifications (table) Item | Specification
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

Customization & Manufacturing Custom shaft diameters, lengths, friction ring widths, and torque configurations are available according to machine specifications and production requirements. Shafts are manufactured from seamless steel tubes or high-strength aluminum alloy profiles with high rigidity and excellent wear resistance. Each shaft undergoes precision machining, strict quality inspection, and dynamic balancing treatment to ensure stable high-speed operation and long-term reliability.

Ordering & Production Selection depends on material type, web thickness, core size, slitting width, roll weight, rewinding speed, and required slip torque. Standard core sizes: 3 Inch and 6 Inch. Shafts lengths and other parameters can be customized. Standard production lead time: typically 7–15 working days. Minimum order quantity: 1 piece. Long shafts are packaged in reinforced wooden cases for safe transportation.

Caractéristiques / Spécifications techniques

• Type de produit : Ball Type Differential Shaft
• Méthode d'expansion : Pneumatic
• Taille du mandrin : 3 Inch / 6 Inch
• Largeurs des anneaux de friction : 25mm, 30mm, 35mm, 40mm, 45mm, 50mm
• Matériau de l'arbre : Acier haute résistance ou alliage d'aluminium
• Longueur de l'arbre : Personnalisée
• Couple de glissement : Réglable
• Application : Machines de découpe et rembobinage
• Mode de fonctionnement : Contrôle différentiel de tension indépendant
• Traitement de surface : Usinage de précision
• Traitement d'équilibrage : Équilibrage dynamique
• Support OEM/ODM : Oui