It is especially designed to wind at shaft core and unwind at single shaft in order to either meet customers’requirements for more higher tension and torque or bear more weighted materials. From expanding of single air bag and expanding keys. shaft core will be clamped. The central body is made from steel or aluminium; expanding keys can be made from other materials under customers’special requirements. According to the drawings, we can make shaft head with all kinds of materials and surface treatments. Due to its unique clamp system, air bag can be replaced after withdrawing the shaft head without adopting special tools.
