Electroformed Bellows

As European market leader for the production of customized high precision metal bellows, our electroforms find application for tight blankets, couplings, flex connectors, sensors, assembly units and many more.
Design Consulting, CAD
Electroforming Au, Ag, Ni, Cu
Aluminium mandrel production, finishing of moulded parts Turning, milling – HSC, 5-axis simultaneous milling, wire-cut EDM, die-sinking EDM drilling, precision grinding
Postprocessing Laser marking, black copper oxidization
QA A range of measuring instruments + methods, X-ray, Scanning electron microscope (SEM) images Microsection
Subassemblies Soldering, assembly


We provide a full product development service or subset starting from the aluminum mandrel to the bellow as required, including the project management, design, development and rapid prototyping followed by pilot production and introduction of volume manufacturing. Our process ensures the traceability of each batch respectively each individual bellow manufactured.

Perfect surfaces

Starting with a high precision aluminum mandrel we electroform metal bellows using specifically maintained electrolytic nickel or nickel copper sandwiches and others surfaces if requested. The outer finish is as specified, polished like if needed.


Sigrist GmbH is certified according to DIN EN ISO 9001:2008 and ISO 14001:2004.