Large machining excellence

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Large machining excellence

We offer large machining services to produce large-sized and complex parts at tight tolerances for the semiconductor, aerospace and defence industry. Many years of experience in precision positioning stages and the high-tech motion industry has enabled us to supply other complex products as well.

The industries we serve


PM has unmatched in-house manufacturing expertise. With a long track record in the semiconductor industry, consistently high product quality is ensured, and each step in the manufacturing process is controlled. Our expertise has also led to increased flexibility: we can implement design changes quickly, and keep lead times as short as possible. 

Aerospace and space

Parts for aerospace and space are often challenging, complex and difficult to machine. We work closely with leading companies on ambitious projects in this industry. We also have experience in various successful space projects (e.g., Ariane) and in the production of landing gears and motor frames, to name a few products. As a result, we are well prepared for your high-precision and complex structural components. 

Military and defence

For over 50 years, we have been a reliable supplier to the world’s leading companies in the military and defence markets. PM has grown from a precision machining subcontractor into a leading supplier for complex machined parts and integrated assemblies. We apply the latest defence guidelines on manufacturing.

Our clients are in all sectors of defence: land defence, aero defence, and naval defence.

As a key supplier, we are involved in major defence programs such as Radar and security systems, F16, F35, Apache, Chinook, NH90 Black Hawk, Mirage, CV-90 tank, Fennek, Boxer, PzH-2000, Drones, P8, Patriot and ESSM missile defence system.

Our long-term philosophy is to act as a system integrator responsible for engineering, manufacturing, assembly, testing, certification, delivery and supply of logistical support.

Large machining additional competences

With the focus on the high tech industry we offer with large machining the following additional competences:

  • Material knowledge
  • Manufacturing
  • Ultra- and extreme-high vacuum
  • Cleanroom assembly 
These competences are explained in more detail below.

Material knowledge

We have extensive experience with various exotic materials. To name a few:

  • Titanium

  • Ceramics

  • Composites

  • Aluminium and its alloys

  • Stainless steel

  • Inconel


PM's large machining department is well equipped for the production of complex and large structural components. The climate-controlled facilities are built to the latest standards (newly constructed in 2018). Below is an overview of the machines we use for the large machining services.

Small-sized products as well

Because large machining is part of our business, we have other modern CNC machines available to machine smaller sized parts with sub-micron tolerances. These machines are used for the small-sized linear bearings and slides, which we offer in our catalog and which can be customised.

The picture on the side shows vacuum chambers, an example of a complex and large product. Customers are related to the semiconductor, solar, research centres (particle accelerator systems), and the pharmaceutical industries. The vacuum products range from large products like chambers to small-sized tubes for electron microscopy.

With an in-depth vertical integration in manufacturing, a wide range of manufacturing services is available:

  • Turning up to 550 mm OD

  • Milling up to 10.5 metres in length

  • Drilling

  • Heat treatment

  • Precision straightening

  • Electrochemical machining

  • Flat and cylindrical grinding

  • Cleaning and assembly

Typical examples of products and structures are positioning stage components, wafer chucks, holders and vacuum chambers for motion systems which we produce in-house.

Since all critical production steps are done in-house, we have full control over every production step and take care of every important detail. With the vertical integration, you can rely on high product quality, more flexibility, lower cost and one main contact person for your project.

Ultra- and extreme-high vacuum

Designing and manufacturing parts for Ultra-High Vacuum (UHV) and Extreme-High Vacuum (XHV) environments require material and manufacturing knowledge and a well understanding of cleanliness and procedures.