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Technical enquiry

Douna Machinery

Douna Machinery

From technical components and assemblies to complete machines: Douna manages the agreed manufacturing process. With expertise in engineering, CNC milling, CNC turning, welding and assembly, we help plan the work and manufacture your product, with attention to measurement and quality control before delivery.

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Green machine during the machining of a metal workpiece
A metal workpiece is first machined on the green machine. Further machining and close-ups follow. The film ends with the formed workpieces. The film has no sound.

Our solutions

From manufacturing requirement to solution

A new component, an improvement to an existing machine or a production series: start with the result you need.

Custom metal components

Need custom metal components made from a drawing, model or existing part? Douna coordinates technical development, production and inspection around the function of your precision component.

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Machine overhaul and repair

Need a machine overhauled or an industrial component repaired? Douna connects technical assessment, repair, assembly and inspection. Existing condition and required function determine the work.

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Machine building and assembly

Need a custom module, assembly or machine built? Douna brings together technical development, component production, mechanical assembly and inspection around the required function and delivery.

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Series production

Having metal components made in series requires clear product data and a repeatable manufacturing route. Douna coordinates machining, any assembly, inspection and delivery for your series and repeat orders.

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3D measurement and quality inspection

Need a component or workpiece measured and inspected? Douna aligns 3D measurement and other measurement methods with the drawing, datums and critical features. The inspection requirement determines the method and recording needed.

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Engineering

Need to design a component, module or machine from a functional requirement? Douna connects mechanical engineering with manufacturability, production and assembly. We agree the development work and design responsibility included in the order.

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Custom metalworking

Looking for a metalworking company for your component or assembly? Douna coordinates milling, turning, sawing, welding and assembly around the shape, function and required final condition. Your enquiry determines the combination needed.

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Complete manufacturing projects

Engineering and production with Douna Machinery? Douna connects the agreed technical development, component production, assembly and inspection. The end product and delivery scope determine the stages we provide.

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At Douna

Manufacturing, knowledge and news

Explore our projects, read about developments at Douna and learn about the technology behind manufacturing.

  • Press platen supported on the machine table, with heating channels visible along its edge
    Project

    Machine component refurbishment: restoring large plates to flatness and specification

    Douna resurfaced heated platens from a vulcanising press by face milling, with attention to workholding, material removal and inspection.

    View project
  • Electric Clark L35XE forklift with its driver beside the battery storage system at Douna’s Hidalgoweg premises.
    News

    Douna takes further steps towards sustainability

    21 October 2026

    A battery storage system at our Hidalgoweg premises and a new electric Clark L35XE forklift: Douna is taking further practical steps towards sustainability.

    Read news
  • Curved manifold block with large threaded ports, sealing faces and bores
    Technical article

    Machining duplex and super duplex: long components, deep channels and residual stress

    Machining and manufacturability · 4 minutes

    Machining duplex and super duplex requires control of cutting forces, residual stress and chip evacuation. Two practical examples show why the machining sequence matters.

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  • Custom transport and storage trolley for aircraft components
    Project

    Aircraft maintenance transport trolley

    Douna developed and built a custom transport and storage trolley for safely moving and storing high-quality aircraft components.

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  • Marathon skaters and Weissensee team participants together on the ice at the Elfstedenhal.
    News

    Douna ready for winter: new marathon skating season and Weissensee team

    16 October 2026

    The skates are sharpened and the teams are ready to start. On Saturday 17 October, the 2026–2027 season begins for the Douna Machinery / Spieren voor Spieren and C-battery marathon skating teams.

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  • Machined metal components with holes and elongated slots
    Technical article

    CNC machining: what is it and how does it work?

    Machining and manufacturability · 5 minutes

    What is CNC machining, and how does a drawing become a component? Read about milling, turning, material selection, workholding, costs and dimensional inspection.

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  • Customer-specific heating boiler test unit in the workshop
    Project

    Test unit for heating boilers

    A customer-specific test unit for central heating boilers, designed and built by Douna to the customer's requirements.

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  • Douna floating hood for Nâ‚‚O measurement at the Nâ‚‚O day at KWR in Nieuwegein
    News

    First Nâ‚‚O day at KWR: from measurement to lower emissions

    5 October 2026

    On 29 September 2026, the water sector gathered at KWR in Nieuwegein for the first Nâ‚‚O day. Douna attended with the floating hood we developed with Emerson to measure nitrous oxide at wastewater treatment plants.

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  • A slender metal shaft is held in the chuck of a lathe
    Technical article

    CNC turning: dimensions, workholding and surface quality

    Machining and manufacturability · 4 minutes

    How does CNC turning work? Explore how workholding, datums, slender workpieces and internal machining affect dimensions and surface quality.

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All projectsKnowledge and news

Our partners

Stronger together in engineering

A selection of the organisations we work with.

  • Logo of Haakon Ellingsen
  • Logo of Optime
  • Logo of Mokveld
  • Logo of KLM
  • Logo of VDL
  • Logo of Emerson
  • Logo of Serman & Tipsmark

Our techniques

Demanding requirements? Douna works with you.

Need special materials, high accuracy or a 3D measurement report? Douna works with you from the start on material selection, manufacturability and inspection. Engineering, machining, welding and assembly are tailored to your requirements. We agree the required measurements and reporting in advance. A production-ready drawing can also be the starting point.

View our capabilitiesMeet Douna
Douna production hall with workpieces, workbenches and a yellow overhead crane

Sustainable production

More electricity generated than consumed

The solar panels on our building generate more electricity over a year than we consume. This gives sustainable production a concrete place in our manufacturing business.

Aerial photograph of the Douna building with its roof covered in solar panels

How can we help you?

Discuss your manufacturing requirement