Custom bellows flexible silicone rubber bellows

Flexible silicone bellows can be developed for an installation where a standard folded profile does not match the space or movement. The starting point is the path the assembly follows, including changes in length and any offset between the attachment points. An exterior shape copied from a stationary sample may not describe the conditions during operation.

Show the component at its shortest, longest and normal positions. Include nearby hardware and anything moving inside the bellows. The folds need room outside the body as well as clearance internally, so both views help define the usable envelope. Where maintenance requires extra travel beyond normal operation, treat that position separately rather than stretching a working sample to reach it.

Material, color and hardness can be tailored along with the geometry. The selected compound should reflect the actual exposure and movement frequency. A design that acts as a flexible cover should not automatically be treated as a pressure-carrying connection.

Sample evaluation should follow the intended movement slowly enough to observe where deformation occurs. Look for one fold carrying disproportionate stretch or an end connection moving out of its seat. Keep the accepted profile associated with its travel limits, not only its resting length. That makes later dimensional changes easier to assess within the same installation.

Material options

Custom silicone compound; formulation and geometry developed together.

Hardness selection

Silicone options: 20–80 Shore A. Look for one fold carrying disproportionate stretch or an end connection moving out of its seat.

Custom geometry

Keep the accepted profile associated with its travel limits, not only its resting length.

Fit evaluation

An exterior shape copied from a stationary sample may not describe the conditions during operation.

Color & OEM

Custom colors; identification clear of folds and end connections.

Photos illustrate structure or material appearance only. Custom bellows are developed for an installation where a standard folded profile does not match the space or movement. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.