Series 811 expansion chuck

Vorwald Series 811 Mechanical Expansion Chuck – Flexible & Precise Clamping for All Winding Applications

The Vorwald Series 811 Mechanical Expansion Chuck is a versatile, high-precision clamping solution designed for demanding winding processes across multiple industries. Built with a modular design, this series offers flexibility through the use of either individual expansion lugs or expansion leafs—ensuring optimal performance, regardless of core type or material.

Custom Clamping for a Wide Range of Cores

Available for core internal diameters from 50 mm to 500 mm, the Series 811 adapts to customer-specific requirements through various expansion lug configurations. Choose from:

• Steel lugs with longitudinal grooves for maximum torque transmission
• Smooth polyurethane lugs for delicate core surfaces
• Screw-mounted lugs with interchangeable surface profiles

Expansion leafs can be used as an alternative to lugs, offering further adaptability for different core geometries or materials.

Powerful & Precise Clamping

At the heart of the Series 811 is its mechanical clamping system based on the inclined plane principle. When activated—either by an integrated pneumatic cylinder or an external machine component—a cone moves axially to engage the expansion lugs radially. This design guarantees:

• Extremely high clamping force
• True running tolerance of ±0.1 mm
• Absolutely concentric clamping, allowing for very high winding speeds

Thanks to uniform expansion, the chuck securely holds the core without slippage, enhancing product quality and machine uptime.

Built for Versatility

The body of the expansion chuck can be manufactured from various materials and wall thicknesses, based on your specific application. Adapters are also available to quickly adjust to different core diameters, ensuring maximum operational flexibility.

Key Features at a Glance:

• For core diameters from 50 mm to 500 mm
• Expansion lugs or leafs with multiple surface options
• Quick changeovers using adapters
• High torque transmission for demanding winding tasks
• Customizable designs upon request