Disc bellows
Unsurpassed extraction ratio
innoFlex® disc bellows have special advantages and are therefore also suitable for unusual applications.
Their distinctive feature is the smooth, accurately cylindrical outer contours. The attractive solution when design is also a factor. You do not pay any mould costs for innoFlex® disc bellows (see table). This is just one of the reasons why disc bellows are particularly cost-effective, even in small quantities.
The design
innoFlex® disc bellows are usually made of CSM rubber, NBR rubber or x-Tend. They are based on individual ring-shaped discs that are alternately connected to each other along the outer and inner contours. This creates a homogeneous material connection – and the closed bellows can be made to any length.
innoFlex® also offers you sewn disc bellows made of Preox, silicate fabric, metallized glass fabric, PUR-coated polyester fabric, etc. We have presented the specific material properties for you here: innoFlex® material list. For horizontal use, innoFlex® disc bellows can be stabilised via internal slide bushings made of PA or PTFE. This prevents the disc bellows from touching the spindle.
During movement, positive or negative pressure develops inside the disc bellows. They therefore need to be ventilated. If required by the customer, innoFlex® can integrate a sufficient number of ventilation elements. The connections of innoFlex® disc bellows can be selected as required: round fixation or flange – or both.
Our tip: innoFlex® disc bellows made of x-Tend
x-Tend is a tear-resistant film developed exclusively for innoFlex®. Its properties:
- Highly UV-resistant
- Adequate resistance to oil and grease
- Usable between –20 °C and +60 °C ambient temperature
- Tear-resistant
Your advantage: By selecting x-Tend disc bellows with large pleat depths you benefit from significant price advantages over conventional solutions.
The protective functions
innoFlex® disc bellows protect spindles and other machine parts from …
- Dirt and dust
- Chips (metal, wood, etc.)
- Water and other liquids
- Oil, grease
- Aggressive substances
… and people from …
- Contact with moving machine parts
Reasons to choose disc bellows made by innoFlex®:
- Outstanding extraction ratio
- Excellent design: particularly even and smooth outer contours
- No mould costs in most cases
- Can also be produced economically in small quantities
- Connections selectable as required: round fixation or flange or both
- With ventilation elements on request
Special materials are available for unusual requirements (e.g. high-temperature applications).
Product details
Material
To provide you with the best possible solution for your specific application, innoFlex® offers you a particularly broad range of materials. After thoroughly analysing your requirements, we will work together with you to find the optimum material – and therefore the best disc bellows for your application.
|
Disc bellows – material overview |
xTend thermoplastic special film |
Nitrile rubber |
Chlorosulphonated polyethylene |
Viton |
|
|---|---|---|---|---|---|
| Abbreviations | xTend | NBR | CSM | FPM | |
| Material number | 220 | 140 | 120 | 180 | |
| Material thickness (Tolerance +-0,2 mm) | 1 | 1.1 | 1.1 | 1.1 | |
| Mechanical properties at room temperature |
Resistance to tearing / MPa / DIN 53504 | 55 | 6.7 | 11.8 | 9 |
| Elongation at break / % / DIN 53504 | 390 | 512 | 497 | 250 | |
| Tear resistance / N/mm / DIN ISO 34-1A | 14 | 13.1 | 10.4 | 24 | |
| Hardness / Shore A / DIN 53505 | 65 | 60 | 63 | 67 | |
| Voltage value 100% (S2) / MPa / DIN 53504 | / | 1.8 | 2.7 | 2 | |
| Thermal behaviour | Cold flexible up to °C | -30°C | -15°C | -18°C | -25°C |
| Max. Dauereinsatz-Temperatur in °C | 50°C | 85°C | 100°C | 200°C | |
| Resistance to | Dust | ||||
| Liquid tight | |||||
| Acids at 20°C | |||||
| Lyes at 20°C | |||||
| Water at 20°C | |||||
| Oil at 20°C | |||||
| Weather and ozone | |||||
| Light | |||||
| Assessment: | Very good | Good | Satisfactory | Adequate | Insufficient |
Please note:
If you are unable to find the right material for your specific application, just speak to one of our applications technicians.
We will be happy to provide you with expert individual assistance.
Connections and accessories
In order to integrate the new slideway protectors in your application in a functionally reliable manner, innoFlex® offers you a wide range of connections and accessories. Just speak to our technicians about your specific application. Together we will find the ideal connections and accessories for your slideway protectors.
When installed horizontally, disc bellows can be equipped with support discs and/or slide bushings. This prevents the bellows from becoming jammed with a threaded spindle or a rack.
High processing speeds cause a great deal of pressure to develop in the bellows, which can even destroy them in the worst case. This is prevented by built-in ventilation (via air flaps or valves).
