
Contract machining along the entire process chain as well as chemical surface treatment through manganese phosphating and blackening.

Klaus Bongartz GmbH & Co. KG Oberflächen- & Zerspanungstechnik
41366 Schwalmtal (DE)New on Amplifa
About Us
Klaus Bongartz GmbH & Co. KG operates two business divisions in Schwalmtal: machining technology and surface technology. The machining portfolio covers all processes of the subtractive value chain – from sawing the raw materials to turning, milling and EDM, through to final grinding and honing. The portfolio is complemented by riveting, shaping, broaching as well as the surface processes of sandblasting, tumble finishing and laser marking. Since 1993, Bongartz Oberflächentechnik GmbH & Co. KG has carried out chemical surface treatments, in particular manganese phosphating to DIN EN 12476 and blackening to DIN 50938. Customers come from a wide range of industries with diverse requirements. Both companies are based at Galgheide 3 in 41366 Schwalmtal.
- Site
- Schwalmtal
- Processes
- Sawing of raw materials, Turning, Milling, EDM, Grinding, Honing, Riveting, Shaping
- Materials
- Manganese phosphating to DIN EN 12476, Blackening to DIN 50938, Machining (Sawing, Turning, Milling, EDM, Grinding, Honing)
Processes and Procedures
Manganese phosphating to DIN EN 12476
Chemical surface treatment for optimising corrosion protection and wear resistance of metal parts.
Blackening to DIN 50938
Chemical black colouring of steel parts for corrosion protection and optical finishing.
Machining (Sawing, Turning, Milling, EDM, Grinding, Honing)
Complete subtractive value chain from raw material to the finished machined component.
Locations
Schwalmtal
DEMachining and surface technology
- Materials
- Metal, steel
- Manganese phosphating line (2003)
Components


Inside the production


Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Sawing of raw materialsMachining | – | – | – | – | – |
| TurningMachining | – | – | – | – | – |
| MillingMachining | – | – | – | – | – |
| EDMMachining | – | – | – | – | – |
| GrindingMachining | – | – | – | – | – |
| HoningMachining | – | – | – | – | – |
| RivetingJoining | – | – | – | – | – |
| ShapingMachining | – | – | – | – | – |
| BroachingMachining | – | – | – | – | – |
| SandblastingSurface | – | – | – | – | – |
| Tumble finishingSurface | – | – | – | – | – |
| Laser markingSurface | – | – | – | – | – |
| Manganese phosphating to DIN EN 12476Surface | – | – | – | – | – |
| Blackening to DIN 50938Surface | – | – | – | – | – |
1 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Manganese phosphating line | – | 1 | – | 2003 | Schwalmtal |
Additional services
History
- 1993
Start of chemical surface treatments (manganese phosphating, blackening) under the previous company name
- 2003
Commissioning of one of Germany's most modern manganese phosphating lines
- 2007
Spin-off of Bongartz Oberflächentechnik GmbH & Co. KG on 01.01.2007 from Klaus Bongartz GmbH & Co. KG