About us

Specialist for complex precision series production

Rau AG has been serving its customers since 1955. Our employees, most of them highly qualified, support you from the planning stage to the ready-to-use components. We manufacture, test and assemble your series articels for you on our own production area.

Core competencies

Our core competencies lie in the series production of complex turning and cubic parts and in system construction with the assembly of series articles with a main part mechanical. Here come the latest machines and production methods in use.

Continuous processes

Our administrative and logistical processes are organised throughout. With our SAP-ERP system, we can cover the most diverse requirements of our customers without compromise.


With our many years of experience, but also with our network of efficient partners for additional processing (semi-finished products, coatings) we can completely manufacture the most complex parts for our customers, always in the highest quality, at the right time and at market prices.

Contact persons

Our contact persons


Our history

Rau AG – easiest beginnings

The current Rau AG was founded in 1955 by the two partners J. Rau and O. Diener.
It all began in the Seebach quarter of the city of Zurich where the two young businessmen took their first steps to independence by providing piece-work for industries in the surrounding area.


After two years they moved to a lager workshop in Oerlikon. In 1961, the two partners agreed to start their future development independently of each other. The original company became two individual comapnies.

New building in Bülach

In 1964, the J.Rau company was able to move into the newly built premises at Solistrasse 60. Thanks to a cautious business and financial policy and the far-sightedness of the company founder Josef Rau, the company continued to develop consistently despite ups and downs.

Conversion into a joint stock company

In 1975, the sole proprietorship J.Rau was converted into the family joint-stock company Rau AG. The success of the company’s own products and the increasing importance of contract manufacturing of precision mechanical parts for a selected group of customers again brought the company into space problems which could only be solved by expansion.


Entry into CNC-Production

One of the clear objectives even then was to keep pace with the rapid technological developments. Therefore, the entry into CNC production took place in 1980 with the first CNC lathes and milling machines. By the end of the 1980s, Rau AG already owned a considerable park of modern multi-axis machining and turning centres.

Own training workshop

Due to the dried-up labour market, a separate training workshop was established in the mid-1980s. Today the company trains 16 polymechanics.

In 1991 Joesf Rau’s son Daniel, who has since become managing director, joined the company. The technology push of 1993 led to strong investments in the means of production and again to an acute space problem, which could only partly be compensated by an extension in 1994.

Spacious new building and company anniversary

In 1995 the already existing quality system was integrated into an overall quality management system according to ISO 9002 and certified accordingly. It was also realised that only a radical increase in size could overcome the eternal shortage of space and lead to an optimum flow of materials. At the end of 1996 the spacious new building, which almost doubled the previous production area, was formally inaugurated.

50 years of Rau AG

In 2005 we celebrated our 50th anniversary with our customers, suppliers, employees and their relatives. In the same year we were able to strengthen our presence in the field of analysis by manufacturing complete laboratory equipment. The year 2006 was marked by the expansion of our assembly competence with the installation of a clean room in which we manufacture highly sensitive assemblies for an application in the HF radio range. The following two years were marked by further significant investments in automation. This included the installation of a linear pallet pool for 3 horizontal machining centres, in a fully automated turning centre for the production of bicycle scars and the linking of two 5-axis machining centres with a placement robot. In addition, we also expanded our measuring capabilities by purchasing a 3D measuring machine with scanning technology.

First volume production for automotive industry

1998 saw the transformation to a system supplier and the integration of the training workshop into the production area. In the following year, the first series orders for the automotive industry were started. For the first time, Rau AG also fulfilled orders for annual volumes of more than 100,000. A new era was initiated with the first machining centre with placement robots in 2000 and 2003, which expanded the company’s system construction activities into the semiconductor and medical technology fields.

Into a new future

The success of the company made a further adjustment to the premises necessary in 2009. Thanks to an architecturally appealing extension, Rau AG has once again significantly improved its internal logistics and created the infrastructure and space for further development. At the same time, we also reviewed our organisational and management structure and made the changes and extensions required for successful future development.

Sponsoring Programs