Precision CNC machining of graphite, CFC and carbon materials to drawing – from prototype to series production.
CTG GmbH & Co KG
Bad Breisig, GermanyNew on Amplifa
Specialist for precision graphite machining
CTG – Carbon Technology Germany is a specialised engineering company for precision graphite machining headquartered in Bad Breisig. The company saws, turns, mills and grinds components directly from the raw block – using diamond tools, CAD/CAM-supported processes and high repeatability. Production is carried out to customer specifications from high-purity fine-grain graphite, CFC, rigid and soft felts, as well as the in-house developed graphite-plastic composite CGS, which is hot-pressed among other things for bipolar plates in fuel cells. In addition to new production, CTG offers repair and reconditioning of graphite components, technical consulting and R&D support, as well as manufacturer-independent material selection and procurement with traceability back to the raw material batch. Customers come from the semiconductor industry, renewable energy technology, mechanical and furnace engineering, aerospace and the chemical industry. The company is certified to DIN EN ISO 9001:2015 and manufactures from one-off pieces to automated, robot-based large-scale series.
- Site
- Bad Breisig
- Processes
- CNC machining (milling, turning, grinding, drilling) of graphite to drawing, Sawing of components from the raw block, Turning, Milling, Grinding, Drilling, Hot pressing of graphite compounds (CGS), Repair and reconditioning of graphite components (cleaning, descaling, post-machining,
- Materials
- Graphite (high-purity fine-grain graphite, isostatic), CFC (carbon fibre composite), Rigid felts, Soft felts, CGS (graphite-plastic composite material), High-purity fine-grain graphite (isostatic), Rigid and soft felts
- Certificates
- DIN EN ISO 9001:2015, ISO 9001
- Founded
- 1968
- Industries
- Semiconductor industry, Renewable energy (photovoltaics, hydrogen, fuel cells), Industrial applications (furnace construction, mechanical engineering, special, Aerospace, Chemical industry, Automotive
- 01
Material selection and procurement
- 02
Sawing from the raw block
- 03
CAD/CAM-supported design
- 04
CNC machining (milling, turning, grinding, drilling)
- 05
Hot pressing of graphite compounds (CGS)
- 06
Cleaning/descaling and repair/reconditioning
- 07
Quality inspection with tactile and optical measuring systems
- 08
Packaging, labelling and shipping
Materials and Processes
High-purity fine-grain graphite (isostatic)
High-purity grades with controlled porosity for semiconductors, chemicals and high-temperature processes.
CFC (carbon fibre composite)
Lightweight, temperature-stable composite material for insulation and structural components.
Rigid and soft felts
Carbon felts for thermal insulation in furnace and heat engineering.
CGS (graphite-plastic composite material)
Compound manufactured by hot pressing for bipolar plates, heat exchanger plates and redox flow batteries.
Locations
Bad Breisig
DECompany headquarters, production and administration ("Goldene Meile" industrial park)
- Lot size
- One-off piece to automated large-scale series
- Materials
- Graphite, CFC, rigid/soft felts, CGS
- CNC machining machines (milling, turning, grinding, drilling) for graphite with diamond tools
- Robot-based production line (since 2022)
- Tactile and optical measuring systems
- Hot press for CGS compounds
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| CNC machining (milling, turning, grinding, drilling) of graphite to drawingMachining | – | – | – | One-off piece – Series (automated large-scale series) | Graphite, Carbon, CFC, Rigid felts, Soft felts, CGS (graphite-plastic composite) |
| Sawing of components from the raw blockMachining | – | – | – | – | Graphite |
| TurningMachining | – | – | – | – | Graphite |
| MillingMachining | – | – | – | – | Graphite |
| GrindingMachining | – | – | – | – | Graphite |
| DrillingMachining | – | – | – | – | Graphite |
| Hot pressing of graphite compounds (CGS)Plastics | – | – | – | – | CGS (composite of graphite and plastic) |
| Repair and reconditioning of graphite components (cleaning, descaling, post-machining,Surface | – | – | – | – | Graphite |
| Technical consulting, R&D support, CAD-supported design and feasibility testingEngineering | – | – | – | – | Graphite, CFC, Felts |
| Material selection and procurement incl. combination of materialsEngineering | – | – | – | – | Graphite, CFC, Felts |
| Tactile and optical measuring systems for quality assuranceTesting | – | – | – | – | – |
3 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| CNC machining machines (milling, turning, grinding, drilling) for graphite | – | – | – | – | Bad Breisig |
| Robot-based production line | – | – | – | 2022 | Bad Breisig |
| Tactile and optical measuring systems | – | – | – | 2017 | Bad Breisig |
Additional services
Quality & Certification
Production is certified to DIN EN ISO 9001:2015 (TÜV SÜD). Tactile and optical measuring systems, works certificates, measurement protocols and traceability back to the raw material batch ensure reproducible quality.
| Evidence | Bad Breisig |
|---|---|
| ISO 9001 |
History
- 1968
Company founded by Ewald Gottschald
- 1996
NC-based small-series production of components
- 1999
Josef Gottschald joins the management
- 2000
Move to the new company headquarters in the "Goldene Meile" industrial park in Bad Breisig
- 2004
CNC-based series production of components
- 2011
Expansion of production area
- 2014
Jan Hendrik von Wetschel joins the management
- 2017
Introduction of tactile and optical measuring systems for quality assurance
- 2018
Expansion of production area, relocation of administration to a new office building, achievement of ISO DIN 9001:2015 certification
- 2019
Expansion of storage capacities
- 2022
Robot-based manufacturing
- 2023
Introduction of the production management system "NTPMS"
- 2024
Further expansion of storage capacities
- 2025
Daniel Tauchert joins the management