Manufacturing of jewellery semi-finished products, custom precious metal products and precision-engineered technical components
Hohenhaus Precision Manufacturing GmbH
PforzheimNew on Amplifa
About us
Hohenhaus Precision Manufacturing GmbH (HPM), based in Pforzheim, is a long-established company in precious metal processing that took over Wilhelm Dietrich GmbH in 2020 and continues its business in the fifth generation. Its range of services includes semi-finished products for the jewellery industry, custom products and accessories as well as precision-engineered technical components and micro-parts for the manufacturing industry. Production is carried out exclusively from recycled precious metals sourced via licensed refineries. The company includes an in-house toolmaking operation, product development from prototype to production readiness, and laser technology. Toolmakers, special machinery specialists, engineers and master goldsmiths work together in this effort. Since 2021, the operation has used a closed wastewater circuit and heats its buildings using waste heat from the machines.
- Site
- Pforzheim
- Processes
- Precious metal processing / manufacturing of precision-engineered components and micro-parts, Toolmaking, Laser technology, Product development / custom solutions (prototype to production readiness), Manufacture of jewellery semi-finished products, Custom products/accessories, Jewellery semi-finished products, Technical components
- Materials
- Precious metals (recycled)
- Certificates
- Quality-oriented manufacturing
- Founded
- 1850
- Industries
- Jewellery and precious metal industry, Manufacturing industry, Technical supplies/manufacturing industry
- 01
Product development/prototyping
- 02
Toolmaking
- 03
Manufacturing (precious metal processing)
- 04
Laser technology
- 05
Assembly/finishing
Materials & Processes
Precious metals (recycled)
Exclusively recycled precious metals from licensed refineries (LBMA, RJC) as base material for jewellery and technical components.
Locations
Pforzheim
DEHead office and production site
- Materials
- Precious metals (recycled)
- Toolmaking
- Laser technology
Components
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Precious metal processing / manufacturing of precision-engineered components and micro-partsGeneral manufacturing | – | – | – | – | Precious metals (recycled) |
| ToolmakingEngineering | – | – | – | – | Precious metals |
| Laser technologySurface | – | – | – | – | Precious metals |
| Product development / custom solutions (prototype to production readiness)Engineering | – | – | – | – | – |
| Manufacture of jewellery semi-finished productsGeneral manufacturing | – | – | – | – | Precious metals |
Additional services
Quality
Precision and care, especially with micro-parts, are ensured by top-maintained machines, an extensive tooling inventory and certified raw materials from long-standing suppliers.
| Evidence | Pforzheim |
|---|---|
| Quality-oriented manufacturing |
History
- 1850
Foundation of the Wilhelm Dietrich company by the goldsmith Karl Mutschelknaus
- 1897
Emilie and Oskar Heidel continue the business in the second generation
- 1950
Manfred Etzel takes over the operation, which was destroyed in 1945, and rebuilds it on Enzstraße in Pforzheim
- 1969
First own business premises on Burgstraße in Pforzheim; focus on semi-finished products for jewellery
- 1986
Hans-Peter Etzel takes over management (fourth generation)
- 1988
Building extension and establishment of an in-house toolmaking department
- 1991
Conversion into a GmbH (limited liability company)
- 1997
Doubling of production floor space
- 2000
150th anniversary
- 2005
Acquisition of the company Klemm-Metall
- 2013
Sabrina Etzel, graduate in business administration, becomes part of the management
- 2014
Acquisition of the company Heinrich Vogt
- 2020
Foundation of Hohenhaus Precision Manufacturing GmbH by Sabrina and Dirk Hohenhaus and takeover of Wilhelm Dietrich GmbH
- 2021
Expansion of the service portfolio to include custom products and technical components; closed wastewater circuit and waste heat recovery