Are All Shaft Adapters The Same?

Air Expansion Shaft Adapters are products derived from the application process of air expansion shafts, which are widely used in the field of rewinding and unwinding industry and are customized according to the design and application scenarios of the air expansion shafts, both in terms of size and structural requirements.

Analysis from the size: According to most industry needs, the shaft outer diameter of the gas expansion shaft size of 2 inches and 3 inches, other industries have 6 inches, 8 inches, 12 inches, and so on, so the size of the gas expansion shaft adapter is customized according to the actual production needs, can be changed in a variety of ways. So what kind of situation will use the air expansion shaft adapter? Let's make an analogy here: the factory has been using a 3-inch gas expansion axis with the work of the material tube, behind the production plan has changed the need to add new materials, the inner diameter of the material tube size needs to be increased to 6 inches or so, but don't want to do the 6-inch gas expansion axis, at this time you can think of customizing the 3-inch to 6-inch gas expansion axis adapter, the gas expansion axis adapter set in the outside of the 3-inch gas expansion axis, the equivalent of the inflated 6-inch gas expansion axis, outer diameter, the outer diameter is 6 inches, the gas expansion axis adapter can be customized according to actual production requirements. 6-inch air expandable shaft, the outer diameter can be 155-158mm.
The common specifications of the gas expansion sleeve are: 3 inches to 6 inches, 3 inches to 8 inches, 3 inches to 10 inches, 3 inches to 12 inches. The diameter of inflatable sleeve is 8mm, and the length is 200mm, 250mm, 300mm, 400mm, 500mm, etc. (PRE China factory can provide the inflatable sleeve according to the customer's requirements. (PRE China factory can be ordered according to customer demand, length is not limited)

From the expanding body structure analysis: gas expansion shaft adapter can be divided into slat type, key strip type, multi-airbag type. Slat type expansion up the aluminum alloy sheet force area is larger, the pivot point force is more uniform, suitable for slitting machine rewinding higher precision or lighter weight coils. Key strip type expansion part is key strip, bearing capacity is stronger, suitable for slitting machine bearing and winding heavier coils. Thru-strip type adopts an integral long key, this kind of air expansion shaft is suitable for high-precision slitting machine rewinding work, especially some narrow film web.

Analyzed from the thread structure and specifications: a variety of thread types,the common types of threaded interfaces of the adapter include inch (such as G1/4, G1/8), metric (such as M14 × 1, M14 × 1.5), etc. Different models correspond to different air fittings.
For example, G1/4-A type is convex point tip, M14-B type is concave point type, which affects the matching with inflatable tools.

From the perspective of application scenarios: for example, the electroplating acid washing workshop requires corrosion-resistant adapters (such as stainless steel material); high-speed slitting machines require highly sealed gas-leak-proof features. Roll film (such as electronic materials) requires low-pressure adapters to avoid damage; heavy paper rolls need high-pressure adapters to ensure tension, and so on. Depending on different application scenarios, the custom design requirements for adapters vary as well.

The inflatable sleeve clamp has a central through hole and is used on inflatable shafts or drive rollers. The inflatable sleeve clamp can be designed mechanically or can be individually inflatable. If it is used on a smooth drive roller, expansion rings need to be added to both ends of the inflatable sleeve clamp to serve a fixing role; if used on an inflatable shaft, it can be made with rings on one side or both sides. If the length of the inflatable shaft is below 500-600 millimeters, one inflatable sleeve clamp is sufficient for one shaft; if the inflatable shaft reaches 1 meter or 2 meters, it is advisable to use 2 or 3 inflatable sleeve clamps on one shaft.

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(Over 20 years experience in air shafts & core adapters production )