|Smooth Gripping Jaws||Interior wall of core is not damaged.||Multiple core reuse|
|Serrations are not used so dust is not created||No maintenance or jamming, no contamination.|
|Torque Activation||Extreme sidearm force not necessary||Less core distortion and no end of roll waste|
|Rolls won't bow|
|Less roll stand fatigue; extended roll life|
|Patented Roller Design||Reliable grip regardless of torque magnitude||Run heavy and/or light rolls with any tension|
|True concentric expansion||Roll bounce is minimized or eliminated|
|Easier to control web tension|
|Lubrication isn’t needed; dust won’t accumulate||No jamming; chuck won’t get stuck in cores|
|Little friction inside chuck; less wear on parts||Little, if any, maintenance and longer chuck life|
|Wide range of expansion||Run butt rolls and rolls with core inconsistencies|
|Step Chuck||Single chuck can run various core sizes||Roll changes are effortless; even between sizes|
|Quick Disconnect Chuck||Interchangeable chucks mount to same plate on machines with width limitations||One center bolt allows quick change to various core size|
The DF-2000's patented torque-activated shaftless design has made it the world's most effective and best-selling shaftless core chuck. Six precision-ground steel rollers are mechanically linked to travel up and down bi-directional ramps created by the back of the jaws and the hexagonal cam. This rolling action minimizes friction while causing expansion and retraction of the chuck’s jaws.
As a result, the chuck can be used in the lightest to heaviest tension applications. The chuck’s mechanical design eliminates the need for the sophisticated and expensive plumbing associated with pneumatic or hydraulic chucks. Rotary unions are also unnecessary with the DF–2000.
There are other chucks which are based on the torque-activated principle, but they use “sliding friction” inside the chuck for expansion. These chucks can’t overcome the friction created by the roll weight to lift and center the roll. A non-centering action results, causing roll bounce and possible jamming. Furthermore, their serrated jaws damage cores and create dust, leading to higher maintenance and more downtime.
PC-4000 Torque-Independent Core Chucks
Core chuck with positive core grip regardless of torque magnitude or direction - for shaftless roll stands, unwind or rewind.
Shaftless Unwind Stands - Powell Engineering
Powell Engineering shaftless unwind stands minimize downtime between rolls. The proven Model EP and EP Junior stands make roll loading and unwinding easy and dependable.
Lightweight, high strength composite cores can be reused indefinitely - replace disposable fiber cores or heavy metal cores.
Carbon fiber core shafts minimize shaft weight without sacrificing strength or stiffness; perfect for unwind and rewind converting applications.