Created on 2025.12.03
Understanding Friction Structures of Differential Slip Shafts: Ball Type, Key Type, Roller Type and Hybrid Designs
Differential slip shafts are widely used in slitting machines, rewinding machines, coating machines, lithium battery film lines, optical film production, and adhesive tape converting factories.
The friction structure determines how the shaft distributes torque across multiple rolls to ensure:
Consistent tension
Flat edge finish
No wrinkles
No telescoping or cone-shape rolls
There are four main friction structures:
1. Ball-Type Differential Shaft
Best for high-speed and ultra-low-tension applications.Ideal for PET film, PI film, optical protective film and battery separator coating lines.
Typical Tension Range: 0.5N – 10N
2. Key-Type Differential Shaft
Designed for general slitting and converting applications such as adhesive tape, label materials and film rolls.
Typical Tension Range: 20N – 120N
3. Roller-Type Differential Shaft
Suitable for medium-to-high tension operations and ideal for composite film, copper foil, aluminum foil, and industrial laminates.
Typical Tension Range: 10N – 60N
4. Hybrid Differential Shaft
A combination structure (Ball + Roller / Key + Roller) for flexible material compatibility.
✔ Final Recommendation
Application Demand | Recommended Model |
Ultra-thin film / High speed / Precision | Ball-Type |
Standard production & cost-effectiveness | Key-Type |
High tension & industrial material | Roller-Type |
Multiple materials / Flexible use | Hybrid Type |
Contact us for customized design for your production line.
WhatsApp