Forged wheels in aerospace aluminum for OEM, defense and aftermarket – manufactured in Freudenstadt
PROLINE GmbH
Freudenstadt (DE)New on Amplifa
About PROLINE
PROLINE GmbH is an owner-managed family company based in Freudenstadt in the Black Forest and manufactures one-piece forged wheels in aerospace aluminum for OEM programs, the defense sector, motorsport and four of its own aftermarket brands (PROLINE, ORCA, LUETHEN Motorsport, RFK Tuning). All value creation takes place at the site: design and FEM simulation, CNC turning of the forged blank, 5-axis milling of the spoke contour in a single setup with tolerances down to 0.01 mm, surface treatment by blasting, polishing and brushing, as well as powder and paint coating. The machine park comprises more than 24 CNC machining centers, including 18 5-axis milling centers; capacity is around 25,000 forged wheels per year. In addition to forged wheels, the company offers aftermarket product lines in cast and flow-formed construction. Wheels are exported to 67 countries.
- Site
- Freudenstadt
- Processes
- Forging (forged wheels, small series & prototypes), CNC turning (rough turning of the forged blank to size), 5-axis milling of the spoke contour in a single setup, Blasting, Polishing (manual and machine), Brushing, Powder coating, Paint coating
- Materials
- Aerospace aluminum (forging aluminum for one-piece wheels), Aerospace forging aluminum, Aluminum (cast), Flow forming, 5-axis milling, Powder & paint coating
- Certificates
- KBA certification, ECE approval, TÜV parts certificate
- Founded
- 1996
- Industries
- OEM automotive, Defense, Motorsport, Aftermarket/tuning, Specialist retail
- 01
Engineering: design, FEM simulation, CAD/NC programming
- 02
Forging of the blank (small series & prototypes)
- 03
CNC turning (rough turning to size)
- 04
5-axis milling of the spoke contour in a single setup
- 05
Surface treatment: blasting, polishing, brushing
- 06
Powder and paint coating
- 07
Quality control: material testing, CNC dimensional inspection, 100% visual
- 08
Logistics & shipping
Material & Processes
Aerospace forging aluminum
Material for one-piece forged wheels for OEM, defense and motorsport.
Aluminum (cast)
Material of the aftermarket product lines in cast construction.
Flow forming
Forming process for aftermarket wheel lines (e.g. ORCA, LUETHEN, PXF).
5-axis milling
Contouring of the spokes in a single setup, tolerances down to 0.01 mm.
Powder & paint coating
Custom surface colors, durable and winter-proof.
Sites
Freudenstadt
DEHeadquarters: administration, engineering, manufacturing, logistics
- Lot size
- Prototypes, small series
- Materials
- Aerospace forging aluminum
- 24+ CNC machining centers
- 18 5-axis milling centers
- Coating system (powder/paint)
Wheels & Components
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Forging (forged wheels, small series & prototypes)Forming | – | – | – | Small series | Aerospace aluminum |
| CNC turning (rough turning of the forged blank to size)Machining | – | – | – | – | Aerospace aluminum |
| 5-axis milling of the spoke contour in a single setupMachining | down to 0.01 mm | – | – | Small series | Aerospace aluminum |
| BlastingSurface | – | – | – | – | Aerospace aluminum |
| Polishing (manual and machine)Surface | – | – | – | – | Aerospace aluminum |
| BrushingSurface | – | – | – | – | Aerospace aluminum |
| Powder coatingSurface | – | – | – | – | Aerospace aluminum |
| Paint coatingSurface | – | – | – | – | Aerospace aluminum |
| Engineering: design, FEM simulation/strength calculation, CAD/NC programmingEngineering | – | – | – | – | – |
| Quality control: material testing, CNC dimensional inspection, 100% visual inspectionTesting | – | – | – | – | – |
| Cast wheels (aftermarket product lines described as cast)Casting | – | – | – | – | Aluminum |
| Flow forming (aftermarket product lines)Forming | – | – | – | – | Aluminum |
2 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| CNC machining centers | – | 24+ | – | – | Freudenstadt |
| 5-axis machining centers | – | 18 | – | – | Freudenstadt |
Additional services
Quality
Every wheel undergoes material testing of the aerospace aluminum, CNC dimensional inspection and a 100% visual inspection before shipping. For the aftermarket, strength certificates, TÜV parts certificates, KBA certification and ECE approvals are available.
| Evidence | Freudenstadt |
|---|---|
| KBA certification | |
| ECE approval | |
| TÜV parts certificate |
History
- 1996
Founding of the PROLINE Wheels brand in Mannheim
- 2016
Founding of ROC Fertigung24 GmbH in Freudenstadt
- 2017
Start of the first prototype and small-series projects
- 2018
Expansion of the machine park and development of the online platform Fertigung24.com
- 2019
New building and move to the new site in Freudenstadt
- 2020
Acquisition of the PROLINE wheel brand by ROC Fertigung24 GmbH
- 2021
Relocation of PROLINE logistics from Mannheim to the Black Forest
- 2022
Expansion to 24+ CNC machines, including 18 5-axis milling centers
- 2023
Merger of ROC and PROLINE, renaming to PROLINE GmbH
- 2024
Entry into the defense sector
- 2025
Acquisition of LUETHEN Motorsport
- 2026
Acquisition of the ORCA Wheels brand