Air Shafts: Not Recommended for Roll Handling
Roll handling equipment is utilized to assist machine operators with loading and unloading rolls of material into and out of converting machinery. Roll handing equipment is also used to assist with moving, storing and packaging rolls. Basic concepts for accomplishing this may be to grip the roll of material by the outside diameter, in a clamping device, for instance or gripping the inside diameter of the core on which the roll is wound. This tech tip discusses the latter method of gripping a roll by the core.
Air shafts and chucks are very common in the converting industry. They are used to grip roll cores and deliver torque to a core in the rotational direction. Gripping the inside diameter of the core on which a roll of material is wound allows brake torque (unwind) and drive torque (rewind) ultimately be delivered to the web in the form of web tension.
Air shafts and chucks are specifically designed to grip a core and apply torque to that core in the rotational direction. Again, for unwinding and rewinding applications. Air shafts and chucks should not be used for roll handling applications and here’s why:
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