Particularly indicated for the rewinding of reels of materials with different thicknesses over the width of the web maintaining at the same time an equal tension as in the case of multiple slit reels.
Recommended for use on slitting and rewinding machines, this friction shaft ensures from the first runs an equal and uniform winding of each single reel, even the narrowest webs.
The friction force is regulated, when the machine is running, by a continuous air supply at a pressure ranging from 0 to 6 bar through a rotating joint connected to the axis of the shaft.
This pressure allows the special keys to expand against the friction elements positioned along the carrier shaft and therefore transmits the necessary torque to the individual reels suitable to ensure a uniform winding.
A simple turn of the cores on the friction element provides a firm radial and axial grip eliminating the need for any spacers.