Fortune Roto Control range of Differential Air Shafts are designed to be easy to use and relatively maintenance free, ensuring the highest winding quality, even when rewinding very narrow rolls down to 9mm in width. Cores are gripped by Friction Rings (ball lock) that run on a central Hard Chromed Air shaft, which has a relatively low coefficient of friction, over which the friction rings can rotate. The tension ranges of the Air Shafts can be varied by changing the expanding strip material of the centre Air shaft, which provides the slippage. By designing the rings to slip internally, common issues have been eliminated in comparison to other designs of Differential Rewind Air Shafts.
Fortune Roto Control can supply Differential Air Shafts & Differential Friction Rings in sizes ranging from 1" Diameter up to 16" Diameter and hold some standard sizes in stock for a faster delivery