
Manufacture of custom precision turned parts in diameters from 3 to 65 mm made of brass, steel, stainless steel, aluminium and copper
Trautwein Präzisionsdrehteile GmbH
Zeil am Main · DunningenNew on Amplifa
About Firner Trautwein
Firner Trautwein is a manufacturer of custom precision turned parts with locations in Zeil am Main and Dunningen. The company produces complex turned-milled parts on CNC single-spindle and multi-spindle lathes and rotary transfer machines, as well as on cam-controlled multi-spindle automatic lathes and rotary transfer machines. Round, hexagonal and hollow stock, tube and wire are machined in a diameter range from 3 mm to 65 mm; lot sizes range from 2,000 to 200,000 pieces, with seven-digit annual volumes handled via frame contracts. In addition to machining, the company offers deburring, surface finishing such as nickel plating, silver plating, chrome plating, zinc plating, tin plating, gold plating, polishing and anodising, heat treatment, flanging, screw fastening, welding on of contact materials and automated assembly of assemblies. Customers are mainly from industries such as electrical engineering, electronics, automotive, communications technology, sanitary engineering, pneumatics and mechanical engineering; further customers come from building services, transport engineering and medical technology. The customer base includes globally active companies, which are also supplied from a high-bay warehouse for customer-specific storage.
- Site
- Zeil am Main
- Processes
- CNC turning (single-spindle automatic lathes), CNC multi-spindle automatic lathes, Rotary transfer machines, Cam-controlled multi-spindle automatic lathes, Sliding-headstock turning / rotary transfer machines, Transfer and special-purpose machines (manufacturing), Deburring, Assembly work/assembly of assemblies
- Materials
- Brass, Steel, Stainless steel, Aluminium, Copper
- Certificates
- ISO 9001
- Industries
- Electrical engineering, Electronics, Automotive, Communications technology, Sanitary engineering, Pneumatics
- 01
Material selection (machining material)
- 02
CNC turning (single-spindle, multi-spindle, rotary transfer)
- 03
Deburring
- 04
Surface finishing / heat treatment
- 05
Assembly of assemblies
- 06
Quality inspection
- 07
Storage and shipping
Locations

Zeil am Main
DEProduction
- Lot size
- 2,000–200,000 pieces
- Materials
- Brass, steel, stainless steel, aluminium, copper
- CNC single-spindle automatic lathes
- CNC multi-spindle automatic lathes
- Rotary transfer machines
- Cam-controlled multi-spindle automatic lathes
- Rotary transfer machines
- Deburring machines
- Transfer and special-purpose machines
- Finishing machines
- Automatic assembly machines
- Handling robots
- High-bay warehouse
Dunningen
DELocation/Production
- Lot size
- 2,000–200,000 pieces
- Materials
- Brass, steel, stainless steel, aluminium, copper
- CNC single-spindle automatic lathes
- CNC multi-spindle automatic lathes
- Rotary transfer machines
Components







Inside the production




Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| CNC turning (single-spindle automatic lathes)Machining | – | – | – | – | Brass, Steel, Stainless steel, Aluminium, Copper |
| CNC multi-spindle automatic lathesMachining | – | – | – | – | Brass, Steel, Stainless steel, Aluminium, Copper |
| Rotary transfer machinesMachining | – | – | – | – | Brass, Steel, Stainless steel, Aluminium, Copper |
| Cam-controlled multi-spindle automatic lathesMachining | – | – | – | – | Brass, Steel, Stainless steel, Aluminium, Copper |
| Sliding-headstock turning / rotary transfer machinesMachining | – | – | – | – | Brass, Steel, Stainless steel, Aluminium, Copper |
| Transfer and special-purpose machines (manufacturing)Machining | – | – | – | – | Brass, Steel, Stainless steel, Aluminium, Copper |
| DeburringSurface | – | – | – | – | Brass, Steel, Stainless steel, Aluminium, Copper |
| Assembly work/assembly of assembliesAssembly | – | – | – | – | – |
| Assembly of assemblies (automatic assembly machines)Assembly | – | – | – | 2,000 pieces – 200,000 pieces | – |
| FlangingForming | – | – | – | – | – |
| Welding on of contact materialsJoining | – | – | – | – | – |
| Screw fasteningAssembly | – | – | – | – | – |
| Nickel platingSurface | – | – | – | – | – |
| Silver platingSurface | – | – | – | – | – |
| Chrome platingSurface | – | – | – | – | – |
| Zinc platingSurface | – | – | – | – | – |
| Tin platingSurface | – | – | – | – | – |
| Gold platingSurface | – | – | – | – | – |
| PolishingSurface | – | – | – | – | – |
| AnodisingSurface | – | – | – | – | – |
| Coating for screw lockingSurface | – | – | – | – | – |
| Heat treatmentHeat treatment | – | – | – | – | – |
| Surface coatingSurface | – | – | – | – | – |
| Turned part production in diameter range 3 mm to 65 mmMachining | – | 65 mm (diameter) | – | – | Brass, Steel, Stainless steel, Aluminium, Copper |
| Machining of round, hexagonal and hollow stock, tube and wire (lot sizes 2,000 to 200,000 pieces)Machining | – | – | – | 2,000 pieces – 200,000 pieces | Brass, Steel, Stainless steel, Aluminium, Copper |
11 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| CNC single-spindle automatic lathe | – | – | – | – | Zeil am Main / Dunningen |
| CNC multi-spindle automatic lathe | – | – | – | – | Zeil am Main / Dunningen |
| Rotary transfer machine | – | – | – | – | Zeil am Main / Dunningen |
| Cam-controlled multi-spindle automatic lathes | – | – | – | – | Zeil am Main / Dunningen |
| Rotary transfer machine | – | – | – | – | Zeil am Main / Dunningen |
| Deburring machine | – | – | – | – | Zeil am Main / Dunningen |
| Transfer and special-purpose machines | – | – | – | – | Zeil am Main / Dunningen |
| Finishing machines | – | – | – | – | Zeil am Main / Dunningen |
| Automatic assembly machine | – | – | – | – | Zeil am Main / Dunningen |
| Handling robot (removal) | – | – | – | – | Zeil am Main / Dunningen |
| High-bay warehouse | – | – | – | – | Zeil am Main / Dunningen |
Additional services
Quality
Quality is ensured through regular staff training, continuously updated equipment and mature production processes; a quality management manager is responsible for this.
| Evidence | Zeil am Main |
|---|---|
| ISO 9001 |
History
- 2022
Further investments in the CNC-controlled machine fleet
- 2023
Contribution to CO2 reduction
- 2025
Lead-free solutions in machining technology; appearances in Frankfurt am Main and Leipzig
- 2026
Exhibition appearance at Electronica in Munich