
Special machinery construction, welded assemblies and CNC contract manufacturing in metal – from one-off pieces to small series.

Apparatebau Jürgen Schmitz GmbH
Koblenz (Zur Bergpflege 45) · Koblenz-WallersheimNew on Amplifa
About AJS
Apparatebau Jürgen Schmitz GmbH (AJS) develops, designs and manufactures special machinery and welded assemblies and is active as a contract manufacturer in machining. The range of services includes special machinery construction based on the company's own modular system principle, CAD/CAM-supported design, analysis and optimisation of existing systems, repair and maintenance, metal construction work, and CNC turning and milling, including series and contract manufacturing. Production is mainly in metal, and in plant engineering for the food industry, among other things, with seamless stainless steel surfaces for hygienic applications. Key industries are the food, automotive, ceramics and glass industries; the company processes around 1,500 tonnes of metal per year. AJS has been based in Koblenz since 1989 and today employs 55 staff plus two apprentices.
- Site
- Koblenz
- Processes
- Special machinery construction, Design, CAD/CAM, Plant engineering for the food industry, Assembly systems and conveying technology for the automotive industry, Packaging systems for the ceramics industry, Analysis and consulting / optimisation of existing systems, Repair and maintenance, Machining (CNC turning and milling)
- Materials
- Stainless steel, Metal, Metal (various)
- Certificates
- Welder qualification certificates
- Founded
- 1989
- Employees
- 55
- Industries
- Food industry, Automotive industry, Ceramics industry, Glass industry
- 01
Analysis and consulting
- 02
Design (CAD/CAM)
- 03
Machining (CNC turning and milling)
- 04
Welded assemblies and metal construction
- 05
Assembly
- 06
Repair and maintenance
Materials and Processes
Stainless steel
Used especially in plant engineering for the food industry with seamless surfaces for easy cleaning.
Metal (various)
Base material for special machinery, welded assemblies, metal construction and machining; around 1,500 t annual processing volume.
Locations

Koblenz
DEHeadquarters and production (Bergpflege 45 and 43)
- Lot size
- One-off pieces to small series
- Materials
- Metal, stainless steel

Koblenz-Wallersheim
DEProduction hall (factory hall)
Inside the production


Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Special machinery constructionEngineering | – | – | – | One-off piece – Small series | Metal, Stainless steel |
| Design, CAD/CAMEngineering | – | – | – | – | – |
| Plant engineering for the food industryAssembly | – | – | – | – | Stainless steel |
| Assembly systems and conveying technology for the automotive industryAssembly | – | – | – | – | – |
| Packaging systems for the ceramics industryAssembly | – | – | – | – | – |
| Analysis and consulting / optimisation of existing systemsEngineering | – | – | – | – | – |
| Repair and maintenanceAssembly | – | – | – | – | – |
| Machining (CNC turning and milling)Machining | – | – | – | – | Metal |
| Series and contract manufacturingMachining | – | – | – | – | – |
| Welded assembliesJoining | – | – | 1,500 tonnes/year (total processing) | – | Metal |
| Metal construction (railings, canopies, various metal construction work)Joining | – | – | – | – | Metal |
Additional services
Quality
Welding work is verified by welder qualification certificates. Production is carried out using modern CAD/CAM systems for repeatability and manufacturing reliability, even with tight tolerances.
| Evidence | Koblenz |
|---|---|
| Welder qualification certificates |
History
- 1989
AJS founded by Jürgen Schmitz in April 1989 in an 18 m² garage in Koblenz-Kesselheim.
- 1990
Relocation to a factory hall in Koblenz-Wallersheim, St. Bernhardstraße.
- 1991
Relocation to Karl-Mand-Straße in the Rhine Port Koblenz industrial park; conversion into a GmbH, Karl-Heinz Heichler becomes co-shareholder and managing director.
- 2000
Inauguration of the new production hall at Bergpflege 45 in the Rhine Port Koblenz industrial park.
- 2006
Karl-Heinz Heichler passes away on 15 November.
- 2008
Roland Rommersbach joins as co-shareholder and managing director in February.
- 2014
Expansion with the Bergpflege 43 production hall and another factory hall in Koblenz-Wallersheim.
- 2022
Leo Tissen takes over as head of manufacturing in March.
- 2023
Jürgen Schmitz steps down from management in March; Leo Tissen becomes managing director and co-shareholder.
- 2025
The new AJS website goes online in January.