... ,quick ,without damage rolls . 2.special types can be customize TJ-ISO1 air shaft 1. The air shaft introducing foreign advanced ... balloon, the shaft is casting by aluminum alloy, shaft body plating chromium, accurate assembly, convenient to use and long operate life ... pneumatic expanding shaft:Φ74,Φ1183,common shaft:fromΦ30-Φ1000 TJ-ISO1 air shaft