CNC Precision
at the highest level
CNC turning, milling and complex assemblies — from design to delivery. Your partner for mechanical engineering, metrology and medical technology.
Machining at the highest level
Steel, stainless steel, aluminium, non-ferrous metals and plastics — we machine every material with the highest precision.
CNC Turning
High-precision turned parts from Ø25 to Ø200 mm with driven tools and Y-axis.
CNC Milling
Complex 3D geometries with 4th and 5th axis on state-of-the-art HURCO machining centres.
Assemblies
From single components to finished assemblies — everything from a single source.
CAD/CAM
Professional design and programming with SolidWorks for optimal results.
Industrial know-how meets AI
We are not classic consultants. We are practitioners helping SMEs implement software solutions that deliver value from day one.
Deliver AI projects
From idea to production-ready solution. Hands-on, with zero consultant jargon.
20 years of industry practice
We are not classic consultants. We are practitioners helping small and medium-sized enterprises (SMEs) implement software solutions that deliver value from day one.
Tailored solutions
Custom-built software solutions that pay off immediately.
Measurable results
No buzzword bingo. We optimize where it really matters. Honest. Direct. With surgical precision.
For formal AI audits we operate a dedicated brand.
FERNAU Consulting guides you through strategy, implementation and operation of your AI and digitalization projects. For independent, formal audits to ISO/IEC 42001 and ISO/IEC 27001, and for structured EU AI Act readiness, we deliberately operate a separate brand: DER-KI-AUDITOR. Consulting and audit stay cleanly separated, as professional audit practice requires.
Both brands are led by Lars Zimmermann: PECB Senior Lead Auditor ISO/IEC 42001 and Lead Auditor ISO/IEC 27001, with 20 years of industry and leadership experience in mid-sized manufacturing. Plain talk from practice — no consultant blabla.
Under the DER-KI-AUDITOR brand we deliver internationally recognized PECB training programs (Authorized Training Partner) for ISO 42001, ISO 27001 and the EU AI Act.
Tradition meets Innovation
FERNAU Präzisionstechnik GmbH, based in Darmstadt, Germany, has decades of experience in CNC machining. As a reliable and competent partner, we support our customers in manufacturing high-quality components.
We place great value on continuously optimizing our production processes to ensure the highest quality and efficiency.
Partnership-driven
We work openly and fairly, eye to eye. Your success drives us, and together we find the best solution for your project.
Innovative
We invest continuously in state-of-the-art CNC technology and refine our processes to deliver the best quality and efficiency.
Sustainable
Our production runs on 100 % renewable electricity. Regional customers are supplied by cargo bike, and as a member of the German Federal Association for Sustainable Economy we actively promote a greener industry.
Flexible
Single parts, small series or short-notice changes — we react fast and pragmatically so your projects ship on time.
Sustainable manufacturing
What does sustainability mean in metalworking? We analyse our CO₂ emissions, energy use and material origins to better understand our environmental impact.
Ready for your next project?
Turned or milled single parts, small series, full assemblies or fixtures — talk to us. Competent, non-binding and personal.