Minply's air (expending) shafts are expanded immediately under air pressure for instant roll mounting and gripping securely and fast without damage to the core or roll. Moreover, at the touch of the fingers (keys, lugs etc.) between shaft and core, they collapse positively for quick roll removal. The shafts consist of three basic parts - a metal body cast in tough, durable, steel or aluminum alloy, an uniquely elastomeric air expanding element and end journals treated with phosphorous salt film. Simplicity and high reliability of shaft design, and high tension strength-to-weight ratio assure rugged, reliable performance with minimum maintenance in excellent economy and ease of operation. 

All Minply's air (expanding) customized (OEM and ODM) shafts (Button, Key, Lug, Leaf types) are our custom manufactured to your specifications. And standardized components facilitate quick, cost-effective construction and replacement .