Airchucks

Pneumatic mechanical chucks

Pneumatic mechanical chucks can be manufactured to suit core sizes from 65mm up to 305mm.
The method of operation is simple and very effective.
When air is applied to the chuck a pressure chamber fills which once filled pushes a piston forward. When the piston travels forward tapered keys are forced up an inclined hardened taper. The gripping elements are attached to the keys.
The Pneumatic mechanical chuck is suitable for braked and driven applications in unwind or rewind positions.

Torque reactive chucks

Heavy duty, torque reactive shaftless unwind chucks can be supplied as a single core size, fixed dual position stepped core sizes or with a fixed base and removable chuck head where space is limited and multiple core sizes are used.

The chucks are actuated when rotation of the reel occurs and expansion is by-directional. Chucks can be manufactured to suit 70mm up to 305mm id cores.

Differential rewind shafts

We can supply differential rewind shafts either for new machine applications or for retrofit to replace existing differential shafts.

Differential rewind shafts to suit standard 3” and 6” id cores are available with other sizes on request.

The differential rewind shafts utilise a base steel shaft where a friction surface is located. The individual gripping chucks are mounted onto this base shaft.

Air is applied through a rotary union in the end of the shaft and is fed into the full width friction strip.

The air pressure is adjusted either manually or automatically by the machine tension control system.

The friction strip increases or decreases the force applied to the interior of the chucks which in turn increases or decreases the tension of the reel.

Each chuck has gripping segments which expand when the core is rotated but retract easily when the winding process has been completed to allow easy unloading.