The PM–1000 pneumatic mechanical shaft utilizes a unique “air-down” gripping system which combines the benefits of concentric expansion with the convenience of air retraction.
Lugs grip the core automatically when the shaft is vented; lugs collapse when air is added.
The MS–1000 mechanical shaft provides the best gripping force of any core shaft available today. It is designed with greater structural strength and a powerful expansion mechanism to handle the heaviest roll weights at high speeds.
No compressed air is needed to operate this mechanical shaft, yet expansion and retraction is easily accomplished with just five (or fewer) turns of the activating screw
PM (pneumatic/mechanical shafts) and MS (mechanical shafts) share many important and distinct characteristics which become especially beneficial when web speeds are fast and roll weights are heavy.
True Concentric Expansion
Mechanical activation locks gripping lugs in the expanded state, actually lifting and centering the roll. This true concentric expansion minimizes roll bounce and vibration – even in high-speed and/or heavyweight applications.
With lugs mechanically locked, the shaft cannot stop gripping during production.
Independent lug action
Each lug set is activated by separate cam springs, allowing the core shaft to grip uniformly even when core variations are present, or when cores aren’t covering all lug sets.
Proprietary journal connection
Proven “scrivet fastening system” ensures durability at journal connections without requiring a press fit.
Positive lug retraction
The mechanical system ensures lugs retract fully so shaft never sticks in cores.
Expanding Air Shafts - Lug Shafts
Air shafts are available in steel, aluminum, or lightweight carbon fiber; suitable for all types of winding applications.
Carbon fiber core shafts minimize shaft weight without sacrificing strength or stiffness; perfect for unwind and rewind converting applications.
Strip Shafts - External Element Core Shafts
Double E strip shafts use multiple external expansion elements to grip the inside diameter of any core material. Ideal for multiple slit rewind web processing applications.
Differential Rewinding Core Shafts
Independent, simultaneous winding of narrow and/or varying slit widths; uniform rolls even with variable material thicknesses.