Precise Erosion Technology, CNC Milling and Wind Tunnel Models with Tolerances up to ±1 µm
SR Erodiertechnik Repert & Leppmeier GmbH
Ergertshausen (Gemeinde Egling) · DeutschlandNew on Amplifa
About Us
SR Erodiertechnik Repert & Leppmeier GmbH is a specialized manufacturing company for high-precision erosion technology, precision mechanics, and laser welding. Its range of services includes wire EDM, sink EDM, and hole EDM, as well as 3- and 5-Axis CNC precision milling, complemented by repair and joining welds via laser welding. With four EDM and four CNC milling machines, delicate contours, complex cavities, and functionally critical components are manufactured with tolerances up to ±1 µm and surface finishes up to Ra < 0.1 µm. Another focus is the production of wind tunnel models (Low- and High-Speed) for development and research projects. Customers come from aerospace, automotive development, wind energy, research, and tool and die making. The company, founded in 1991 with 17 employees and an annual revenue of around 2 million €, manufactures in Ergertshausen near Munich and supplies customers throughout Germany and Europe.
- Site
- Ergertshausen
- Processes
- Wire EDM, Sink EDM, Hole EDM, 3-Axis CNC Milling, 5-Axis CNC Milling, Laser Welding (Repair and Joining Welds), Manufacturing of Wind Tunnel Models (Low- and High-Speed), Quality Assurance: tactile 5-axis and optical 3-axis measurement, First Sample Test Reports
- Materials
- all electrically conductive materials (for Wire EDM), Copper (Electrode material for Sink EDM), Tungsten-Copper (Electrode material for Sink EDM), Graphite (Electrode material for Sink EDM), All electrically conductive materials, Copper, Tungsten-Copper, Graphite
- Certificates
- DIN EN ISO 9001 (QM system organized according to ISO 9001), ISO 9001
- Founded
- 1991
- Employees
- 17
- Industries
- Aerospace, Automotive Development, Wind Energy, Research, Tool and Die Making
- 01
Technical Consulting
- 02
Hole EDM
- 03
Wire EDM / Sink EDM
- 04
CNC Milling (3- and 5-Axis)
- 05
Laser Welding
- 06
Measurement and First Sample Test Report
Materials & Processes
All electrically conductive materials
Suitable for wire EDM, also machinable in hardened or high-strength condition.
Copper
Electrode material for sink EDM.
Tungsten-Copper
Electrode material for precise sink EDM processes.
Graphite
Electrode material for sink EDM processes on hard materials.
Locations
Ergertshausen (Gemeinde Egling)
DEProduction and Administration
- Lot size
- Individual parts up to small series
- Materials
- Electrically conductive materials, hardened and difficult-to-machine materials
- Sodick ALC600G Wire EDM machine with 5-Axis technology and rotary axis (600 × 400 × 350 mm)
- Hole EDM machine (600 × 400 × 400 mm)
- Sodick AG60L Sink EDM machine, 4-Axis with rotary axis and 32-way EROWA electrode changer (600 × 420 × 370 mm)
- Makino D500 5-Axis Milling Machine (550 × 1,000 × 500 mm, 20,000 rpm)
- Makino V33i 3-Axis Milling Machine (650 × 450 × 350 mm, 30,000 rpm)
- ZEISS Coordinate Measuring Machine
Components
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Wire EDMErosion | ±1 µm · Ra < 0,1 µm | 600 mm × 400 mm (Travel paths 600 × 400 × 350 mm) | – | – | all electrically conductive materials, including hardened |
| Sink EDMErosion | ±2–3 µm · Ra 0,6 µm | 600 mm × 420 mm (Travel paths 600 × 420 × 370 mm) | – | – | hard and difficult-to-machine materials |
| Hole EDMErosion | – | 600 mm × 400 mm (Travel paths 600 × 400 × 400 mm) | – | – | hardened materials, difficult-to-machine materials |
| 3-Axis CNC MillingMachining | – | 650 mm × 450 mm (Travel paths 650 × 450 × 350 mm) | – | Small series | – |
| 5-Axis CNC MillingMachining | – | 1000 mm × 550 mm (Travel paths 550 × 1,000 × 500 | – | Individual parts – Small series | – |
| Laser Welding (Repair and Joining Welds)Joining | – | – | – | – | – |
| Manufacturing of Wind Tunnel Models (Low- and High-Speed)Machining | extremely tight tolerances · excellent surface quality | – | – | – | – |
| Quality Assurance: tactile 5-axis and optical 3-axis measurement, First Sample Test ReportsTesting | – | – | – | – | – |
6 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Wire EDM machine with 5-Axis technology | Sodick ALC600G | – | 600 × 400 × 350 mm, 6th axis (rotary axis) for round parts, wire rotation | – | Ergertshausen |
| Hole EDM machine | – | – | 600 × 400 × 400 mm | – | Ergertshausen |
| Sink EDM machine, 4-Axis with rotary axis | Sodick AG60L | – | 600 × 420 × 370 mm, 32-way electrode changer for EROWA | – | Ergertshausen |
| 5-Axis Milling Machine | Makino D500 | – | 550 × 1,000 × 500 mm, spindle up to 20,000 rpm | – | Ergertshausen |
| 3-Axis Milling Machine | Makino V33i | – | 650 × 450 × 350 mm, spindle up to 30,000 rpm | – | Ergertshausen |
| High-precision Coordinate Measuring Machine | ZEISS | – | – | – | Ergertshausen |
Additional services
Quality
Climate-controlled measurement and production rooms, a high-precision ZEISS Coordinate Measuring Machine, and tactile 5-axis and optical 3-axis measurement ensure dimensional accuracy. First sample test reports and ERP-supported production planning ensure traceability from individual parts to series production; the quality management system is organized according to DIN EN ISO 9001.
| Evidence | Ergertshausen |
|---|---|
| ISO 9001 |
History
- 1991
Founding of the company
- 2019
Successful generational change
Press reports including in Süddeutscher Zeitung and Münchner Merkur