Friction shafts
The right tension for every roll: ball friction rings compensate for thickness variations in multi reel applications – for constant web tension and neatly wound narrow rolls.
Friction shafts are the ideal choice when longitudinal slitting produces several narrow rolls simultaneously and their material thicknesses vary. Instead of driving all cores rigidly, each ball friction ring transmits its torque individually – this compensates for different roll diameters and ensures that the web tension remains constant across all reels. This is controlled via a continuous air pressure application based on the web tension and roll diameter, so that even stretch-sensitive materials are wound with repeatable accuracy.
Which design best suits your application depends on the bearing and loading concept: as a continuous friction winding shaft or as a cantilevered variant for short setup times on the slitter-winder. The following two series cover the most common requirements.
