Series L expansion shaft

Optimized Clamping for Sensitive Applications - Series L Pneumatic Expansion Shaft

In demanding winding applications, where material sensitivity and true running are critical, the Vorwald Series L pneumatic expansion shaft stands out as a precision-engineered solution. Designed specifically for operations involving thin-walled cores or coreless winding, the Series L provides consistent, reliable clamping with a streamlined modular design that facilitates quick servicing and part replacement.

The hallmark feature of the Series L shaft is its continuous expansion leafs, ensuring even clamping along the entire internal surface of the core. This is particularly beneficial in scenarios where material deformation must be avoided. Users can select between smooth, lengthwise grooved, or combined leaf surfaces, depending on the specific application needs.

Thanks to a clever construction using DIN screws, outer and inner leafs are securely connected yet easy to replace, simplifying both maintenance and customization.

Winding Without a Core? No Problem.

The LG version of the Series L shaft incorporates a fixed expansion leaf, enabling stable, true-running performance when winding materials without a core. This feature makes the LG ideal for operations where initial web gripping or minimal runout is critical.

Smart Construction for Maximum Efficiency

True to Vorwald’s design philosophy, the Series L is constructed with a modular architecture, allowing for fast replacement of shaft journals without customer-side machining—as long as the outer shaft diameter remains constant. In most production setups, the shaft body is made from steel for durability, while the leafs are typically manufactured from aluminium. However, steel leafs—smooth or knurled—are available upon request for higher load requirements.

Replacing the internal assembly is fast and easy, made possible by a user-accessible journal end that simplifies servicing and keeps downtime to a minimum.

Key Features and Options

Available Options:

• Smooth or grooved expansion leafs
• WR: Extended expansion range
• LG: With web start clamping
• Custom dimensions on request

Advantages:

• Designed for both thin-walled and coreless winding applications
• Fast and simple maintenance thanks to modular design
• Suitable for shaft diameters from 40 mm to 300 mm
• Trouble-free operation ensured by tight shaft/journal tolerances and fixing screws
• Very short repair times, reducing production delays

The Vorwald Series L pneumatic expansion shaft represents a sophisticated yet practical solution for sensitive winding tasks. Whether you're working with fragile cores or aiming for coreless winding, its combination of continuous clamping, modular flexibility, and robust engineering ensures high reliability and optimal performance—keeping your operations running smoothly and efficiently.