For fast change over of un-winder/winder roll air expanding shafts                are required for core holding. Through its air valve air can                 fill and the air shaft will hold the core by expanding the                rubber bladder.  Core gets released after removing the Air by                 thump press.  Most commonly used cores are 3 inch ID core but bigger                 cores are also used where heavy weight of the unwind/re-wind                 rolls.                Air expanding shaft is                 core-holding device suitable for 3” core inside diameter & 70mm                 core diameter. Lugs type Air expanding shaft is most commonly                 used for  paper or PVC  core holding. Square end Airshaft can be                 used with safety chucks for winding & winding. The shaft can                 take load of 30kgs to 500kgs. Cantilever type Airshaft is                 available with one side shaft for mounting.

               

Air valve can locate                 at face length or shaft end according to requirements. In case                 of failure of air shaft rubber bladder your service mechanic can                 easily replace the tube at your place itself. Importance is                 given to valve fitting and Teflon tape sealing of valve thread                 and to avoid damage of O rings. To avoid overfilling of air                 to avoid puncture of air bladder special air gun can be ordered                 with pressure so that know the in built air pressure inside the                 Air shaft. If require special Hardened ends, bearing size it                 should be mentioned in your order.

Features

• Belmark air expanding shaft delivers superior              performance for winding application in the widest range of roll              handling process.

• Belmark air expanding shaft is one of the best              cores gripping having widest range from heavy to light duty work.

• Belmark air expanding shaft minimize reel change              over time.

• Belmark air shaft does not lead to any harm at              the core surface.