Pneumatic expanding shafts with strips are used for unwinding and winding material on and from cores (reels).
They can operate at high linear speeds and handle heavy loads, including the weight of the material being wound or unwound.
The principle of operation involves increasing pressure within an inflatable bladder located directly beneath each strip. Strips expand, increasing the shaft diameter and securely clamping the core. This enables torque transmission from the shaft to the core. Unlike airshafts with lugs, expanding shafts with strips offer greater versatility, accommodating multiple narrower cores or a single wider core.
Various options for shafts with ledges are available, including standard and special versions, to suit different needs.
The most popular, convenient, and safe method for installing expanding shafts is using special safety chucks.
EXPANDING SHAFT BODY
- Aluminium
- Steel
- ERGAL
- Carbon fibre
EXPANDING SHAFT STRIPS
- Rubber
- Aluminium
- Polyurethane
- Polizene
Pneumatic expanding shafts with strips – aluminium body
| Shaft diameter [mm] | 48,5 | 68,5 | 74,5 | 74,5 light | 74,5 | 98,5-100 | 118,5-128 | 148 light | 148 | 150,5 light | 150,5 | 198-201 |
| Core diameter [mm] | 50,8 | 70 | 76,2 | 76,2 | 76,2 | 101,6 | 120-127 | 150 | 150 | 152,4 | 152,4 | 203,2 |
| Number of strips | 3 | 5 | 5 | 5 | 6 | 6 | 6 | 6 | 8 | 6 | 8 | 8 |
Pneumatic expanding shafts with strips – steel body
| Shaft diameter [mm] | 17,8 | 25 | 50 | 68,5 | 74,5 | 99 | 118 | 150,5 |
| Core diameter [mm] | 18 | 25,4 | 50,8 | 70 | 76,2 | 101,6 | 120 | 152,4 |
| Number of strips | 1 | 3 | 3 | 5 | 5 | 6 | 6 | 8 |
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