Who we are



The service focus of SFK - Schulz GmbH, service, manufacturing and plastics technology - is the small-and large-scale production and distribution of turned and milled parts made of steel, plastics, aluminum, and zinc, as well as the construction of devices and equipment for special purposes.

In these areas, we work very closely with operations in the Republic of Lithuania.
Here, we see ourselves as an external supplement to the German market and offer for the above mentioned areas complex, cost-effective solutions and our services.

We take care of our customers the complete manufacturing and logistics operations of selected individual parts or assemblies.


Thus we are able to realize complete solutions at a high technical level.

On our website, we provide only a small part of our extensive service offer whereas



Get personal advice from us
we will find a suitable solution for your request.

The company SGN-STEEL GmbH has been damaged since the year 2000 with metalworking, production of pipe flanges and sales. The aim is to produce pipe flanges of excellent quality. Some products from the product range: flat flanges, loose flanges, threaded flanges, Ansi flanges, blind flanges, assembly of intermediate piece, tube bundle walls, spiral flanges, manhole, trunk flanges, etc.
Some products from the special flanges product range. Any shape, thickness, of all types according to drawings even with different bores, threaded connections with metric, pipe or NPT thread up to DN 2000.
Version: with natural, galvanized or hot-dip galvanized surface.

Metal and steel construction, pipeline construction
Welding work,
Special construct ionenes
Components, gates, stairs,
Railings, balconies, doors

Everything for the success of our customers
Since 1993, we convince our customers with many strong arguments: the combined expertise in plastic, plastic assemblies, system assemblies, tooling and services. Not without reason do us both medium-sized companies and large international corporations from diverse industries to appreciate as a powerful partner.

Everything from one source
As an experienced system partner, we offer you a wide range of tried and proven standard products, customized solutions and comprehensive service. Competent consultants and qualified application engineers guarantee it active, continuous assistance from the optimal choice of products to complete system solutions.

Put it all together more
You can expect more from us: We develop tailor-made solutions - and across a variety of materials and product groups.Positive side effect: Thanks to this process-oriented approach there is the additional opportunity to create important synergies and possibilities for substitution.

Everything you want
Behind the terms plastic, plastic assemblies, system assemblies, tooling and services hidden in Siebrecht an enormous range of individual, also safe for you interesting products and solutions. Do the best for yourself what our diverse range.

All along the process chain
Since in finding solutions in our house, the process concept is at the forefront, it is natural for us to provide our customers throughout the entire process chain - to provide advice and practical help - from the planning stage through to implementation to delivery. Depending on your needs, we agree together with you, our comprehensive services will depend on your specific needs.

Everything when and where you want
Through intelligent logistics systems and a computerized warehousing, we can easily adapt to your specific planning procedures.An extensive warehousing guarantees for standard parts, a short-term availability. Even e-commerce solutions and EDI / VDA interfaces are on our system landscape at any time mappable.

All who trust us
The narrow, mostly long-term cooperation with customers from different industries is clear evidence of the reliability of our products and our cross-industry expertise. Priority areas for which we are working: commercial vehicles, automotive, craft, lighting, construction, medical,
and much more

All you want to know
Whatever your requirement - you are in good hands. Personal, competent contacts assure an intensive all-round support and superior service.
When you convince yourself of our performance? Discover new potential for your success - with us as a strong partner!

We look forward to you and your job.

Mechanical large parts machining of machine parts with a focus on guideway grinding

SIM Gdynia was founded in 1978 and has been a family company since then. We specialise in machining, in CNC technology and in the production of the highest quality machining components for all branches of industry. Initially, our company is a good example of the fulfillment of “The American Dream” and it shows it is possible in any circumstances. Today, after over 35 years, we are a modern enterprise proud to represent the highest level of technology, service organisation and responsibility.Today SIM Gdynia means:
a team of approximately 170 employees, including 25 engineers and a Quality Department of 10,
over 50 modern CNC machines and measuring devices including brand new and fully robotised ones of the world leading brands (Makinol, Mori Seiki, Kitamura, Enshu, Okuma, Chiron, Star, Fanuc, Miyano, Doosan, Mitutoyo),machining of alloys (also stainless steel, superduplex) and plastics according to the clients` requirements, samples and drawings,
our own production of worm gear,
the CAD/CAM/CAE computer aided design and manufacturing system,
the export of almost 70% of total production to world class companies and leading corporations in Western Europe, North and South America and Far East,
active Quality Policy, ISO 9001:2008, other certificates and prizes.

Since 1959, the company SIMON is active both as a manufacturer of molds for plastic injection and as a designer of special machines.



Two basic activities:

-Moulds for plastic injection

Special-Machines

General-Mechanical (small and medium series)

Simplastic is a Portuguese thermoplastic injection company, that supplies a service going from design and development to assembly, including supply chain management. We produce semi and finished products with metallic, electric and electronic components, providing time proven integrated solutions. We have 45 years of experience producing for and working closely with clients in several sectors, such as household appliances, electronics, lighting systems, robotics, agriculture, etc.

The company "Sinecs" d.o.o. Bihać was founded in 2002. The main activity of the company is
production of metal structures and parts for the market. All constructions are made according to
previously elaborated technical documentation with the use of modern software for
construction and design.
In its plant, the company has NC and CNC machining centers, MIG/MAG devices for
welding, and band and circular saws for metal cutting.
As part of its business, the company also provides protection services for metal structures (sandblasting and
varnishing), as well as the sale of machines and equipment.