Core Shafts Core shafts, also known as winding shafts, especially air shafts, are used for radial and axial fixing of material rolls. As a result of the very different technological requirements, we have developed the following expansion shafts: Lug TypeAir Shafts Slat TypeAir Shafts Leaf TypeAir Shafts MechanicalShafts PneumaticMechanical Shafts