Inflatable Shaft Expanding shaft has advantages of convenient operation,quick without damage ... of aluminum alloy or steel construction,all air expansion shaft we can according to customer's drawing,welocm ... OEM and ODM.1,Key tapy pneumatic expanding shaft: ourside diameter varies in Φ36.Φ48.Φ56.Φ74 ... .Φ150.Φ200.Φ3002,Aluminum tile pneumatic expanding shaft:Φ74,Φ1183,common shaft:fromΦ30-Φ1000.