Knowledge Center
Machine Comparison
Air Shaft vs Differential Shaft
Air shafts grip every core together, while differential shafts let each roll slip independently for multi-lane winding.
Quick Answer
An air shaft expands to grip a single core or several cores together, so it is simple and common for single rolls. A differential shaft lets multiple rolls on one shaft slip independently, so each lane can wind at its own speed. Choose by whether the rolls need to slip independently.
Air Shaft vs Differential Shaft Comparison
For multi-lane slitting where lanes differ slightly, a differential shaft keeps every roll even and avoids loose or over-tight lanes.
Selection Flow
FAQ
What does an air shaft do?
An air shaft expands to grip the core so it turns with the shaft, used for unwinding or rewinding a single roll or matched rolls.
When do I need a differential shaft?
When multiple lanes on one shaft must wind at slightly different speeds due to thickness or tension differences.
Does a differential shaft cost more?
Yes. It is more complex because each roll position slips independently to control tension.
Can I use an air shaft for multi-lane winding?
You can, but if lanes differ slightly, the rolls may wind unevenly because they cannot slip independently.
What information should I send before asking for a quotation?
Send the number of lanes, core size, roll width and whether lanes differ in thickness or tension.
Ask an Engineer
Not sure whether you need an air or differential shaft?
Send us your lane count, core size and roll width. MWELLPACK can recommend the right shaft.
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