Friction ball rings with double row of expanding balls, totally interchangeable these rings ensure a perfect locking and frictioning of the slits to be rewound, they are available in the following executions:
- Spring loaded or without spring
- Unidirectional or Bidirectional
- Made of aluminium, steel, plastic bushed, plastic-steel bushed or plastic-aluminium bushed
- Suitable for cores diameter from 50mm up to 12”
- Minimum width rings 7mm (for 3” cores) up to 60mm
- Special ring diameters and special width on demand
Twist type friction ball rings (IES patent) allow to the users to obtain a large number of benefits absolutely unthinkable with traditional rings:
- Balls are always in contact with the core
- Absolute certainty that all ball locks are engaged and clamping the cores across the full web width
- Automatic locking and core centering
- Suitable for cardboard, plastic and steel cores
- More accurate tension control
- Increased torque transfer