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3" Lug type pneumatic expanding shaft steel material
3" Lug type pneumatic expanding shaft is used to hold and grip paper core, it is a straight shaft. This air shaft can be made with steel and aluminum material as need.

Lug type pneumatic expanding shaft is through keys expanding out, so as to grip pare core tightly after injecting air source. After exhausting air source, then the keys return back to air shaft's body, so as to take out paper core for replacement.
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