Keller Feinwerktechnik GmbH

Us in Detail

We face the challenges of tomorrow today. We offer our customers worldwide state-of-the-art automation solutions with the latest generation of robot technologies.

With a hundred-year tradition and continuously growing and very successfully active in the development and manufacturing of customer-specific precision parts, assemblies, and special machines for over 30 years.

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Special-Purpose Machine Construction

From development through to commissioning and service, we develop state-of-the-art automation solutions with the latest generation of robot technologies for customers worldwide in special-purpose machine construction.

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Automation

Plant Automation

Robot Automation

Industrial Automation

CNC Automation

Special Plant Construction

Robots & Cobots

Our Competencies in Contract Manufacturing

We produce high-quality and demanding precision turned and milled parts on state-of-the-art computer-controlled machines, suitable for a wide range

of industrial applications. We also offer the assembly of complete units on behalf of our customers.

CNC Machining

CNC machining is a highly precise manufacturing process that utilises computer-aided control.

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Large-scale Production

Special-purpose machine construction is the key to developing tailored solutions for specific production requirements.

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Small-batch Production

This technology is ideal for the production of complex parts in small quantities.

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Assembly

Assembly is a decisive step in manufacturing, in which various components are assembled into a functioning product.

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A Selection of our Projects

Automation, Robotics and Special Engineering in Detail

These custom-built machines help to increase efficiency and competitiveness.

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Assembly requires precise planning and execution to ensure all parts fit together perfectly.

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CNC machining is not only relevant for the automotive industry, but also finds application in many other areas such as aerospace, medical technology, and mechanical engineering.

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Contract manufacturing enables companies to quickly scale their production capacities without the necessity.

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About Keller Feinwerktechnik

Thanks to our many years of experience and the high individual qualifications of our approximately 50 employees, combined with strong commitment, we today offer our customers worldwide state-of-the-art automation solutions with the latest generation of robot technologies.

We face the challenges of tomorrow's market today.
Get in touch with us!

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Discover Keller Feinwerktechnik

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Latest Posts

Contract manufacturing is a strategic decision that enables companies to focus on their core competencies while outsourcing production to experienced partners.

19.03.2026

Our new website is online!

We wanted to move away from "you'll eventually find it somehow" towards a site that works faster, is clearer, and feels more like what our customers actually need in day-to-day work. Whether you are looking for a partner in special-purpose machine construction or contract manufacturing, have a specific task in mind, or simply want to see what we do: you now get to the point much more directly.

Retrofitting machines: Modernizing instead of buying new benefits production and maintenance.

Machines run reliably, but requirements are changing: higher production volumes, new quality standards, a lack of spare parts, or rising energy costs. At the same time, new machines are becoming increasingly expensive and delivery times are longer. This is precisely where machine retrofitting comes in: Existing systems are specifically upgraded technically and functionally to the latest standards, without the need for a complete new purchase.The search intent of many decision-makers is twofold: they want to understand what retrofitting means (informative), and simultaneously assess whether a machine retrofit is economically worthwhile and which partner is suitable (commercial). This article provides you with both: clear fundamentals, typical measures, Industry 4.0 potential, and practical application examples.

Special machine construction: Everything from a single source

Why special machine construction is crucial todayProduction lines are changing in ever shorter cycles. New materials, increasing quality requirements, and a shortage of skilled workers are putting increasing pressure on manufacturing processes. Standard machines quickly reach their limits. Special-purpose machine construction provides a solution: customized, scalable, and automated solutions that are precisely tailored to the task – from precise handling and assembly to testing technology and inline-capable quality assurance.As a mechanical engineering company with strong expertise in precision engineering, Keller Feinwerktechnik combines in-depth engineering knowledge with industrial implementation strength. This results in customized solutions that reduce cycle times, minimize scrap, and sustainably improve process capability.The added value of "everything from one source"Many projects fail not because of the idea itself, but because of interface issues. Different suppliers, shifting responsibilities, and duplicate coordination cost time, money, and nerves. Our approach: everything from a single source – from the initial concept sketch to CE-compliant handover.One point of contact, clear responsibility: Project management that consolidates decisions and reduces risks.Seamless data chain: From 3D design to parts list to documentation, everything remains consistent.Faster iterations: At our company, mechanics, electronics/software and precision manufacturing literally sit at the same table.Predictable quality: Standardized processes, reliable deadlines, and predictable costs.This is how reliable machines are created that work immediately in the factory - and not only after weeks of rework.Competencies: Development, manufacturing, assembly - seamlessly integratedEngineering & ConstructionWe begin with a thorough requirements analysis and a robust specification. Our design combines precision engineering expertise with robust mechanical engineering: kinematics, clamping and handling technology, metrology, PLC/IPC, vision systems, and safety concepts. Digital simulations and FMEA ensure the design is sound before the first part is milled – a key strength in special-purpose machine construction.Precision manufacturing & assemblyIn precision manufacturing, core mechanical components are produced with tight tolerances. We manufacture mating surfaces, guides, bearings, and sealing points with reproducible accuracy. Our assembly process integrates mechanics, pneumatics, and electrical systems into functionally tested assemblies. The result: backlash-free movement, smooth operation, and maximum service life.Automation & SoftwareWe implement automation with PLCs (e.g., IEC 61131), motion control, robotics, and HMIs – including recipe management, traceability, and interfaces to MES/ERP. Diagnostics, OEE metrics, and remote maintenance reduce downtime and enable predictive maintenance.Testing, CE & ServiceBefore delivery, we test with actual workpieces. CE documentation is developed in parallel with the project. After commissioning, we provide support with training, spare parts service, and upgrades. Lifecycle thinking is part of our concept – as are retrofit options for future product variants.Applications: How customized solutions create measurable benefitsAssembly systems for micromechanics and precision engineeringWhen components are adjusted with tolerances ranging from tenths to micrometers, the combination of mechanics, sensors, and temperature management is crucial. Our solutions ensure precise joining forces, accurate positioning, and stable cycle times – even with sensitive surfaces.Testing technology and end-of-line testingOptical measurement, functional testing, leak testing, or electrical testing: We integrate vision systems, force/displacement measurements, and data acquisition directly into the production line. Test plans are configurable, and results are traceable. This increases process reliability and auditability.Handling, feeding, packagingFrom feeding difficult-to-handle parts to automating final packaging: robotic cells with gripper changes, intelligent conveyor technology, and format-variable stations create flexibility – ideal for product families and small batch sizes. We focus specifically on robotics and cobots.Retrofit and cycle time optimizationA new system isn't always necessary. We analyze bottlenecks, reduce downtime, and modernize drives and controls. The result: increased output at lower unit costs – without lengthy downtimes thanks to targeted system automation.Process reliability through well-designed manufacturing processesSpecial-purpose machines are only as good as their process integration. We consider the entire value stream: material flow, setup concepts, ergonomics, maintenance accessibility, and spare parts strategy. We rely on modular design to quickly implement variants. Our manufacturing processes are documented and quality-assured – from parts production and assembly testing to final acceptance.Why Keller Feinwerktechnik?Technical depth in precision engineering: Precision is our everyday life - from fits to surface quality.Systems thinking in special machine construction: mechanics, electrical engineering, software and quality assurance are intertwined.Scalable complete service: Everything from a single source - with clear responsibilities and short communication channels.Project reliability: Transparent deadlines, clean documentation, reliable budgets.Long-term partnership: Service, spare parts and upgrades throughout the entire lifecycle.Search intent fulfilled: Providers with full serviceAnyone looking for a "comprehensive service provider for special-purpose machinery" doesn't expect individual trades, but rather a team that solves complex tasks from a single source. This is precisely where Keller Feinwerktechnik positions itself: We translate requirements into functionally reliable machines – efficiently, transparently, and audit-proof. Whether it's a greenfield project or a retrofit, we focus on measurable results such as cycle time, availability, quality, and total cost of ownership.

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Request a free consultation now – we'll provide you with practical advice.

Are you planning a new plant or would you like to automate an existing process? Whether it's special-purpose machinery, plant engineering, or targeted automation solutions: We develop a solution that fits your requirements, interfaces, and target values – transparently, structurally, and with a clear focus on cost-effectiveness.

Use the contact form for a non-binding inquiry. Briefly describe your task, and we will get back to you promptly to discuss how we can sustainably improve your production with a customized machine.