
Metal products factory for stamping, welding and CNC machining – from prototype to series production

Josef Sprenger GmbH & Co. KG
Finnentrop-HeggenNew on Amplifa
The Company
Josef Sprenger GmbH & Co. KG is a medium-sized family business based in Finnentrop-Heggen in the Sauerland region that has been manufacturing metal parts since 1947. Its range of services covers stamping, welding (including automated welding with welding robots) as well as CNC machining technology, extending from prototype construction and sample parts through to series production. The company machines metallic materials for customers from the metal processing and mechanical engineering sectors. On an operating floor area of around 1300 m², the production departments work closely together to implement orders quickly and economically. Regular certifications in quality management and an environmental audit first completed in 2016 ensure a consistent production standard. The management lies with the third and fourth generation, Sven and Annegret Steinberg.
- Site
- Finnentrop-Heggen
- Processes
- Stamping, Welding, CNC machining technology, Metal working (prototype construction, sample parts, series parts), Decorative metalwork (manufacture of ornamental metalwork parts), Prototype construction, Sample parts, Series production
- Materials
- Metal, Metal (steel), Stamping, CNC machining technology, Welding
- Certificates
- ISO 9001:2015, ÖKOPROFIT Finnentrop, ISO 9001, ÖKOPROFIT
- Founded
- 1947
- Industries
- Metal processing, Mechanical engineering
- 01
Stamping
- 02
CNC machining
- 03
Welding
- 04
Assembly
Materials and Processes
Metal (steel)
Base material for stamped, welded and machined parts in all production areas.
Stamping
Cutting and forming processes for stamped parts in series.
CNC machining technology
Machining production of prototypes, sample parts and series parts.
Welding
Joining process, also automated with a welding robot.
Location

Finnentrop-Heggen
DEHeadquarters / Production site
- Materials
- Metal
- Welding robots
- CNC machining machines
- Stamping press
Inside the production






Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| StampingForming | – | – | – | – | Metal |
| WeldingJoining | – | – | – | – | Metal |
| CNC machining technologyMachining | – | – | – | – | Metal |
| Metal working (prototype construction, sample parts, series parts)Machining | – | – | – | – | – |
| Decorative metalwork (manufacture of ornamental metalwork parts)Assembly | – | – | – | – | Metal |
Additional services
Quality and Certification
The QM system is certified to ISO 9001:2015 (TÜV Saarland/SGS); regular audits according to current technical standards ensure the quality level. In 2016, an environmental audit (ÖKOPROFIT) was successfully completed for the first time.
| Evidence | Finnentrop-Heggen |
|---|---|
| ISO 9001 | |
| ÖKOPROFIT |
Company History
- 1947
Master locksmith Josef Sprenger founds the company in a garage next to his home; manufacture of ornamental metalwork parts
- 1977
Son-in-law Hubert Schulte takes over the management of the business
- bis 1990
Two construction phases with new production floor space, expansion of the product range
- 2001
Michael Steinberg and his wife Annegret take over the company
- 2008
Son Sven Steinberg joins the business
- 2016
First successful environmental audit (ÖKOPROFIT)
- 2019
Sven Steinberg takes over management from his father in September