Key Type Differential Shaft for Slitting & Rewinding Machines

 For precision rewinding applications, combining a key type shaft with a web tension control system can significantly improve roll quality and tension stability. 

XW Machinery key type air expandable shafts are designed for high-speed slitting, rewinding, coating, and converting applications requiring stable core gripping and reliable tension performance.

  Our pneumatic key type shafts provide strong expansion force, accurate roll positioning, and durable operation for paper, film, foil, label, and lithium battery production lines.

  Customized shaft diameters, lengths, materials, and expansion structures are available for various industrial applications.

Key Features of XW Machinery Key Type Air Shafts

• Strong and stable core gripping force
• Smooth expansion and deflation operation
• High concentricity for high-speed rewinding
• Durable steel and aluminum shaft options
• Stable web tension performance
• Suitable for heavy-duty industrial applications
• Customized shaft diameter and length available
• Long service life with low maintenance

Applications of Key Type Air Expandable Shafts

Our key type air shafts are widely used in:

• Slitting machines
• Rewinding machines
• Coating machines
• Printing machinery
• Film converting equipment
• Paper processing lines
• Flexible packaging systems
• Foil slitting machines
• Lithium battery production lines
• Label rewinding equipment

Steel vs Aluminum Key Type Air Shaft

  For advanced rewinding performance, key type shafts are often integrated with a web tension control system to improve tension stability and roll quality.

  XW Machinery specializes in customizing Key Type flexible inflatable shafts, designed specifically for tile coating machines, bearing positioning, and precision coating production lines. Adopting a pneumatic expansion+key bar locking structure, it can quickly and evenly clamp the core, achieving efficient and slip free winding and unwinding.

Technical Specifications

Technical parameters (customizable)

• Material: 45 # steel/seamless steel pipe/aluminum alloy (optional)
  
• Inflatable diameter: 3 inches, 6 inches (supports other sizes)
  
• The length, shaft head form, and number of key bars can be customized according
• to the drawings
  
• Working pressure: 0.4-0.8 MPa
  
• Certification: ISO9001 Factory Certification

What Is a Key Type Air Expandable Shaft?

A key type air expandable shaft is a pneumatic winding shaft designed to securely grip paper cores during winding and unwinding operations. After air inflation, the expansion keys extend outward evenly to lock the core firmly and maintain stable torque transmission.

 Compared with standard lug structures, key type air shafts provide stronger core engagement, better concentricity, and smoother operation in high-speed converting equipment.

 XW Machinery manufactures customized key type air expandable shafts for slitting machines, rewinding systems, coating lines, printing equipment, and flexible packaging machinery.

 XW Machinery also provides high-performance differential air shafts and slitter rewinder machine parts for advanced converting industries.

 Many high-speed slitting machines use a magnetic powder clutch together with pneumatic shafts to achieve accurate torque control.

Why Choose XW Machinery?

XW Machinery specializes in precision web handling components for modern converting industries. We provide customized pneumatic shaft solutions for customers worldwide.

Our main products include:

• Air expanding shafts
• Differential air shafts
• Magnetic powder clutches
• Web guiding systems
• Tension controllers
• Slitter rewinder machine parts

With stable quality control and flexible customization capability, XW Machinery supports a wide range of industrial winding and rewinding applications.

Ordering Process：
1.    Inquiry: Send us your requirements (Diameter, Length, Material).
2.    Drawing Confirmation: Our engineers provide/confirm technical drawings within 4 hours.
3.    Quotation: Competitive factory-direct pricing based on specs.
4.    Production: 7-15 days lead time (standard parts).
5.    Quality Check: ISO9001 standard inspection before shipping.

1.    Can you customize the shaft length to fit our machine? (Yes, we provide drawings for confirmation.)
   2.    What is the MOQ? (1 piece is supported.)
   3.    How do you handle shipping for long shafts? (Reinforced wooden cases.)

Our factory has passed ISO9001 quality certification, ensuring quality assurance.

What is a key type air expandable shaft?

A key type air expandable shaft is a pneumatic shaft that expands outward using key bars to securely hold paper or film cores during rewinding and unwinding processes.

What are the advantages of key type air shafts?

Key type shafts provide strong gripping force, stable rotation, high concentricity, and reliable operation for high-speed converting applications.

What industries use key type air shafts?

They are widely used in paper, film, foil, flexible packaging, printing, coating, and lithium battery industries.

Can you customize shaft sizes?

Yes. XW Machinery supports customized shaft diameters, lengths, materials, and expansion structures according to machine requirements.

What core sizes are available?

Common sizes include 1 inch, 3 inch, and 6 inch cores, with customized specifications available.

We are a professional manufacturer of inflatable shafts in China, specializing in the production of various types of inflatable shafts, pneumatic clamps, and friction shafts. We have served hundreds of coating, printing, and packaging enterprises worldwide. Do you need drawings or quotations? Click on 'Get A Quote' or contact customer service, reply within 4 hours!