Core competencies and history of Otto Klostermann GmbH

A strong and innovative partner for sheet metal working and processing

Otto Klostermann GmbH is a family-owned company that was founded as a blacksmith’s shop by Otto Klostermann in 1848. In 1945, the company was taken over by Raymund Klostermann, who expanded it in 1969 and brought it to the new location at Merklinderstraße 5 in Castrop-Rauxel. As a result, more space was created for forging and the development of sheet metal forming, cold forming technology. In 1986 Thomas Klostermann became managing director, and with his brothers Martin Klostermann and Christian Klostermann, is still running the company in 5th generation.

The largest press brake in Europe

Our manufacturing facilities are located in Castrop-Rauxel, Germany, on an area of 30,000 m², 10,000 m² of which are roofed over. The photovoltaic system on the roof supplies the company with electricity; power generated in excess is fed into the grid. We are specialised in the production of large steel profiles. What makes our family company unique is that we own the largest press brake in Europe, with a bending length of 16,100 mm and a compressive force of 4,000 t. Other presses can even process parts of up to 20,000 mm in length and 200 mm in thickness.

Continuous growth, many years of experience, modern machine fleet and our employees form the basis for us to be able to meet your individual requirements and to realise them in a fast, precise and economical way.

Die größte Abkantpresse Europas

Wir produzieren an unserem einzigen Standort Castrop-Rauxel auf einem 30.000 m² großem Grundstück, von dem 10.000 m² überdacht sind. Die auf der Dachfläche vorhandene Photovoltaik- Anlage versorgt den Betrieb mit Strom, Überkapazitäten werden ins Netz eingespeist. Spezialisiert haben wir uns auf die Fertigung besonders großer Stahlprofile. Ein Alleinstellungsmerkmal unseres Familienbetriebes ist der Besitz der größten Abkantpresse Europas, mit einer Abkantlänge von 16.100 mm und einer Druckkraft von 4.000 t. Andere Pressen können sogar Teile bis zu einer Länge von 20.000 mm und einer Dicke von 200 mm bearbeiten.

Kontinuierliches Wachstum, langjährige Erfahrung, der moderne Maschinenpark und unsere Mitarbeiter bilden die Basis, um individuell auf Ihre Wünsche eingehen zu können und diese schnell, präzise und wirtschaftlich zu realisieren.

Four reasons to choose Otto Klostermann GmbH


Customer benefits:

The flame-cut blanks with the most complicated weld preparations are of particular interest for the production in renewable energies such as tripods, jackets and monopiles. This helps to avoid mechanical re-work of weld seam chamfers, which might be extremely expensive, especially on large components.


Imitation protection:

Steel, Cutting and Cold-forming Technology at Otto Klostermann GmbH are the exclusive masters in our core competence and no competitor has yet been able to imitate them, because our know-how and the knowledge we have acquired ourselves push our machines to their performance limits, where even the manufacturers start throwing in the towel.



This core capability leads to a sustainable advantage over our competitors, as we are the only ones who can produce the complicated welds with abrupt bevel changes in one work step.



The core capabilities provide potential access to new markets. Thanks to this, Steel, Cutting and Cold-forming Technology of Otto Klostermann GmbH has been awarded contracts in the wind energy sector.