About 22-21

About 22-21

Twenty-two twenty-one has specialised in providing mechanical engineering services. These include the conceptualisation and realization of industrial machines and products, as well as the expertise for manufacturing and assembly. In its different forms of engagement, twenty-two twenty-one sets out to coordinate the interfaces to other specialist areas that may exist and seeks to coordinate these in an effective manner. Developments and constructions span from small prototypes to highly complex systems. The range of services encompass visualizations and concept studies, development and detailed construction as well as intensive project coordination of manufacturing and assembly phases.

The focus is on providing tailor-made, high-quality solutions for technical challenges, while ensuring a reliable communication and a timely completing.

About me

Jan Pütz

I studied mechanical engineering at the RWTH Aachen University, specialising in the field of construction and development. 

During these years, I worked in an engineering office in Aachen, enrolled in the construction of test benches for electrical machines and range extenders, and contributing to the development of a knee joint prosthetic for a Paralympic athlete.

After a stopover in an engineering office in Berlin, I worked for a start-up company in Duisburg for several years. The start-up was committed to advancing wave energy research, becoming one of the internationally leading players in the development of a wave energy power plant that would generate power from ocean waves. In the first years as a development engineer, I oversaw the in-house developments but also managed external customer projects involving specialized machine constructions for maritime and mechanical applications. Over the years, a series of differently scaled prototypes of wave energy power plants were successfully developed and installed. A number of innovative component test benches were also effectively developed. Measurement campaigns with complex mechatronic automation and data acquisition systems for simulation validation were carried out in international research institutes (e.g. in Plymouth, Nantes and Edinburgh) and at sea in Denmark.

In the past years, a number of patent applications were filed with co-inventors in the fields of marine energy conversion, hydraulics, belts and GRP springs.

As a development engineer and later as a technical manager, I acquired extensive experience and comprehensive technical knowledge and expertise, which no doubt also tied to the unique attributes of start-up companies, including the significance of product development lifecycles in such enterprises and forms of interdisciplinary cooperation they advance.

Where does the name Twenty-Two Twenty-One come from?

22-21 refers to a guideline that was developed over the past 50 years, and which outlines a systematic approach to “technically creating”, as Fritz Kesselring put it in one of the first publications on this guideline. Over the years, the inherent priniciples were developed further with contributions from a series of other well-known engineers, and developed into the VDI guideline 2221 – published in 1993 under the title "Methodology for developing and designing technical systems and products" *.

The choice fell on the name "twenty-two twenty one " because the "VDI twenty-two twenty-one" reminds me of an frequently helpful "go-to answer" during my studies and is a guideline which, methodologically, still outlines the most important toolkit employed in construction and design.

* In 2019, the guideline was re-published under a slightly different name.


Scope of services

Construction and development

Engineering of technical systems and products. This encompasses determining the explicit and implicit requirements, the provision of first sketches and drafts but also detailed CAD models of the system, as well as research and selection of purchasable parts. Further, it entails the compilation of technical documentations and manufacturing supervisions.

Special engineering

Development, construction and project coordination pertaining to special devices, apparatuses and machines, also in the context of ambitious time frames. A defining aim is to ensure ergonomic and safety-related aspects as well as to facilitate close interface coordination of manufacturing, mechatronic and automation processes.

Product development

From the planning to the development phase, the aim is to ensure the product's overall marketability. This includes visualizations, test and demonstration samples, as well as the construction of prototypes and the necessary expertise for manufacturing of the product.

3D Printing

Encompasses the identification of the most suitable rapid prototyping process as well as the creation of a 3D printing-compatible design for parts and components. Workpieces and devices with dimensions of up to 300 x 300 x 400 mm are manufactured internally using the FDM process using a range of high-quality materials.

Tool and mould making

Konstruktion und Fertigung maßgeschneiderter Formen und Werkzeuge - insbesondere für die Fertigung und Nachbearbeitung von Produkten und Bauteilen aus Verbundwerkstoffen. Optimierung von Entwicklungs- und Produktionszeiten bei gleichzeitiger Kostensenkung.

FEM simulation and structure analysis

Structure analysis of components using finite element analysis (FEA) as well as result verification and validation. Deformation analysis and load-oriented component design and optimization.


Projekte & Impressionen

Impressions from 22-21’s portfolio