Where to applicate bellows?
Bellows are used to protect moving machine parts from dust, dirt and the like, thus minimising the risk of machine downtime and extending service life. Bellows also protect operators and others from injury through contact with moving machine parts, thus optimising safety.
In addition, bellows are increasingly used in machine design, where they not only protect moving machine parts but also are ideal for various covering purposes. They provide an attractive finish and, thanks to the flexible folds, their size is easily adapted.
A wide standard range
The standard range selection includes four types of bellows: Cylindrical Fold Bellows, Conical Fold Bellows, Single-Fold Bellows and Rubber Disc Bellows.
All common sizes made of versatile, durable materials
Most common materials for folding bellows in standard range are either Molerit® or Chloroprene.
Molerit® is a unique thermoplastic material, which has properties similar to rubber and good chemical resistance. The material (T59) has a hardness of 59.5 Shore A (DIN 53905), is black in colour and has an application temperature range of - 32°C to + 70°C (max. 85°C). Molerit® is extremely weather resistant, but has limited resistance to oils and grease.
Chloroprene (CR) has a hardness of 60 Shore A (DIN 53505), is black in colour and has an application temperature range of - 45°C to + 95°C (max. 120°C). The material is weather resistant and has high acid and solvent resistance.
In addition, a small number of folding bellows made from Nitrile Butadiene Rubber (NBR) is available in the standard range.
See more about material properties
Customized design or other colours?
We also offer customised bellows to meet specific requirements on size, material, shape and colour. Delivery times are relatively short and tool costs low.
Rubber disc bellows
Takes up minimum space when compressed
In many applications, it is best to use a bellow that takes up minimum space when compressed.
Rubber disc bellows are made of rubber discs vulcanised together. In comparison with the length achieved when fully extended, the bellows are extremely compact when compressed, i.e. the difference between maximum length (Lmax) and minimum length (Lmin) is large.
Rubber disc bellows are made from Chlorosulfonated polyethylene (CSM) with a hardness of 65 Shore A. CSM is black in colour and has an application temperature range of -20°C to +110°C. The material is reasonably resistant to oil and chemicals and has exceptional weather resistance.
See more about material properties
Different end shapes of disc bellows
In standard range, rubber disc bellows are equipped with collar at both ends for clip attachment.
As special products, rubber disc bellows are available in other sizes and - in addition to collar ends - with flange, distance flange and blind (closed) ends.
See the standard range of rubber bellows in the webshop.
Any type of bellow is available
Fold bellows are possible to order in special dimensions and other colours than black.
Besides folding bellows and rubber disc bellows, we also manufacture customised guideway covers and box bellows to individual specifications.
Please request our special brochures. Contact us early in the design phase for guidance on optimising the solution.
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