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| Printing >
AIR SHAFTS |
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AIR SHAFTS |
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AIRSHAFTS |
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| Specifications |
The NEWLONG precision airshafts are used in the unwinder and rewinders of presses, paper machines, plastics processing machines, slitters and bag making machines.
The advantages of airshafts over mechanical shafts are (1) finger-touch operation for ease of operation, (2) lightweight and simple construction, (3) quick core and roll change, (4) easy maintenance, and (5) safety. | | The NEWLONG precision airshafts are available in 3 types:tube, cylinder, and screw type. The cylinder type has an embedded piston, while the screw type uses an impact wrench. Both the screw and cylinder types have a high precision of ±0.2 mm eccentricity to the inner core diameter of web. The journal of all airshafts are heat-treated and then ground to ensure excellent wear resistance and precision. | | PARALLEL / ZIG-ZAG LUG TYPE | | The lugs in these standard types are arranged in parallel or zig-zag. The large contact area holds the core firmly to allow high torque rotation.
The zig-zag type, with the lugs arranged continuously, is especially suitable for slit-rewinders. |
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| | BUTTON TYPE | | The button type is recommended for relatively low load, low torque applications, or for high torque operation when thin cores are used because the lugs bite into the core. |
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| | LEAF TYPE | | The shaft as a whole expands and contracts, and is suitable for coreless or multiple-core (slitter, etc.) applications. The torque is uniform across the face width (lower torque transmission than the parallel lug type). |
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| | CARBON SHAFT | | The carbon shaft is made of complex plastic materials reinforced by carbon fiber reinforced plastics (CFRP) and carbon fibers. These materials are ideal for super-lightweight airshafts having low moment of inertia and high rigidity.
The super-lightweight airshafts are easy to handle, improving operation efficiency (the shaft weight is approx. 1/3 to 1/2 that of a steel shaft). |
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| | CANTILEVER TYPE | | The core can be removed with ease without lifting the shaft because the shaft is normally mounted on the converting machine.
The parallel, zig-zag, and leaf types can be used. |
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| | AIR ADAPTER | | The size of the existing airshafts is increased by mounting the air adapter without increasing the weight significantly.
The weight of a 3" airshaft with 6" adapters is about one-half that of a 6" airshaft (various sizes available on request). |
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| AIR HANGER | The air hanger is used to handle cylinders, etc. more efficiently and smoothly. It is inserted into a web roll placed upright. With air supplied, the serrated lugs bite firmly into the core allowing lift of the roll. The web roll surface is kept intact because the paper roll is not clamped for lifting. |  |
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| SLIDE CHUCK | |  | The shaftless slide chuck reduces cost and improves work efficiency. Instead of the conventional linear contact by taper cones, the slide chuck uses the surface contact for positive core clamping and torque transmission. The mechanical slide chuck requires no maintenance.
3",4",6",9",12" ( various sizes available on request) |
| AS CARRIER | |  |
The AS carrier is recommended for handling heavy rolls and shafts. The weight of the shaft is supported by the AS carrier. Shafts that were usually transported by several operators can now be transported by a single operator. An hydraulic oil pump is used for lifting the table.
Max. load : 150 kg
Shaft dia.: 75 to 180 mm
Min. height : 150 mm
Lift : 500 mm |
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