Molded Rubber Bellows Soft Rubber Bellows

Molded rubber bellows use a formed sequence of folds to accommodate movement around a covered joint or passage. Their flexibility depends on the wall profile, fold spacing and selected material, as well as the overall dimensions. A soft feel when handled is not enough to determine the available stroke in an installed mechanism.

Consider how the end connections move relative to one another. Extension, sideways offset and angular motion affect the folds differently. Combining these movements can bring one side into contact with itself while stretching the opposite side. Leave clearance around the working envelope so the bellows does not scrape a guard or mounting bracket.

Fit the ends in their intended orientation without introducing a twist into the body. Exercise the mechanism slowly through its required positions before normal operation, watching for pinched folds or tight attachment edges. This component's suitability for carrying fluid or pressure must be established separately from its ability to flex. Inspect the fold roots during servicing, where damage can be less visible than on the outer crests.

Material options

Rubber compound options, customized alongside the profile and contact conditions.

Hardness selection

Solid rubber options: 30–90 Shore A. Combining these movements can bring one side into contact with itself while stretching the opposite side.

Custom geometry

Consider how the end connections move relative to one another.

Fit evaluation

A soft feel when handled is not enough to determine the available stroke in an installed mechanism.

Color & OEM

Custom colors; identification clear of folds and end connections.

Photos illustrate structure or material appearance only. Molded rubber bellows use a formed sequence of folds to accommodate movement around a covered joint or passage. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.