Manufacturer of micro precision springs, spring strands and flat wire spirals for medical technology, the electrical industry and the jewellery industry
LUPA Präzisionsfedern GmbH
Hardt near Schramberg · GermanyNew on Amplifa
About LUPA Präzisionsfedern
LUPA Präzisionsfedern GmbH was founded in 2000 by Harald Lupa and is a medium-sized family company headquartered in Hardt near Schramberg in the Black Forest. The company specialises in the manufacture of spring strands, micro springs, compression springs, flat wire spirals as well as wire and cable sections with wire diameters from 0.03 mm and spring diameters from 0.25 mm. Production uses, among other materials, stainless steel, unalloyed spring steel wire, tungsten (also gold-plated), platinum and platinum alloys as well as PTFE-coated wires. The products are used primarily in medical technology – for example for guide wires, catheters, endoscopes, biopsy forceps or cardiac pacemakers – as well as in the electrical, watchmaking and jewellery industries. In addition to spring manufacturing, the company offers centreless grinding, electrolytic marking, de-coating, 90-degree cutting, welding, ultrasonic cleaning and customised packaging. Since 2021, the company has been producing in a new building of around 2,000 square metres; following the acquisition of 11 machines from Mauch Drahtbearbeitung GmbH & Co. KG, the machine fleet comprises 45 machines. Customers are supplied worldwide, including in the USA, South America, Asia and Europe.
- Site
- Hardt
- Processes
- Spring strands (manufacturing), Flat wire spirals, Micro springs, Compression springs, Wire and cable sections, Guide wires (on request according to specification), Individual springs (development, prototype, series production), Centreless cylindrical grinding / infeed grinding
- Materials
- Stainless steel, PTFE coatings, Tungsten, Gold-plated tungsten, Platinum, Platinum alloys, Unalloyed spring steel wire, Special materials
- Certificates
- DIN EN ISO 9001, ISO 9001
- Founded
- 2000
- Industries
- Medical technology, Watchmaking industry, Jewellery industry, Electrical engineering/electrical industry, Model making, Consumer goods
- 01
Consulting and development from idea to series production
- 02
Wire forming/winding of springs
- 03
Special machining (90-degree cutting, welding)
- 04
Surface treatment (grinding, marking, de-coating)
- 05
Ultrasonic cleaning
- 06
Quality inspection
- 07
Packaging
- 08
Shipping
Materials and Processes
Stainless steel wire
Base material for spring strands, micro springs, compression springs and flat wire spirals.
Unalloyed spring steel wire
Conventional spring steel for springs with high load capacity.
Tungsten / gold-plated tungsten
Special material for medical applications requiring X-ray visibility or electrical contact capability.
Platinum and platinum alloys
Precious metal materials for contact parts such as cardiac pacemakers and hearing aids.
PTFE coatings
Coated wires for low friction and sliding applications.
Special materials
Customer-specific materials on request.
Centreless cylindrical grinding
Through-grinding and infeed grinding of spring ends for dimensional accuracy.
Ultrasonic cleaning
Residue-free cleaning and degreasing, also of sensitive, complex geometries.
Electrolytic marking
Precise marking of the products using an electrolytic process.
Welding
Fixing of individual coils by means of a weld spot.
Site
Hardt (near Schramberg)
DEProduction and administration
- Part weight / size
- Wire diameter 0.03–0.60 mm; spring diameter 0.25–10.00
- Lot size
- from 1 piece
- Materials
- Stainless steel, spring steel wire, tungsten, platinum, PTFE-coated wires, special materials
- 45 spring winding/production machines (as of 2026)
- 11 machines acquired from Mauch Drahtbearbeitung GmbH & Co. KG
- Custom-built ultrasonic cleaning system
Components and Products
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Spring strands (manufacturing)Forming | – | up to approx. 6 m | Wire diameter 0.03 mm – 0.60 mm | – | Stainless steel, PTFE coatings, Tungsten, Gold-plated tungsten, Platinum, Platinum alloys, Unalloyed spring steel wire, Special materials |
| Flat wire spiralsForming | – | up to approx. 6 m × Strip width up to 2.0 mm × Strip thickness 0.08 to 0.3 mm | Spring diameter up to 8.00 mm | – | Stainless steel, Unalloyed spring steel wire, Special materials |
| Micro springsForming | – | – | Wire diameter from 0.03 mm | – | Stainless steel, PTFE coatings, Tungsten, Gold-plated tungsten, Platinum, Platinum alloys, Unalloyed spring steel wire, Special materials |
| Compression springsForming | – | – | Wire diameter 0.05 mm – 0.50 mm | – | Stainless steel, PTFE coatings, Tungsten, Gold-plated tungsten, Platinum, Platinum alloys, Unalloyed spring steel wire, Special materials |
| Wire and cable sectionsForming | – | up to approx. 3 m | Wire or cable diameter from 0.15 mm | 1 piece (delivery of small quantities) | Stainless steel, PTFE coatings, Special materials |
| Guide wires (on request according to specification)Forming | – | – | – | – | – |
| Individual springs (development, prototype, series production)Engineering | – | – | – | 1 piece | – |
| Centreless cylindrical grinding / infeed grindingSurface | – | – | – | – | – |
| Marking using an electrolytic processSurface | – | – | – | – | – |
| De-coating of coated productsSurface | – | – | – | – | – |
| 90-degree cuttingMachining | – | – | – | – | – |
| Welding (weld spot for fixing individual coils)Joining | – | – | – | – | – |
| Ultrasonic cleaning (residue-free cleaning and degreasing)Surface | – | – | – | – | – |
| Quality inspection (inspecting, measuring, monitoring from incoming materials to delivery)Testing | – | – | – | – | – |
| Packaging (tube packaging, poly bags, blister tray, transport mandrels, cartons)Assembly | – | – | – | – | – |
4 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Spring winding/production machines (machine fleet) | – | 20 (as of | – | – | Hardt |
| Production machines (machine fleet after acquisition) | – | 45 | – | 2026 | Hardt |
| Custom-built cleaning system | – | 1 | – | 2015 | Hardt |
| Machines of Mauch Drahtbearbeitung GmbH & Co. KG (acquired) | Mauch Drahtbearbeitung GmbH & Co. KG | 11 | – | 2026 | Hardt |
Additional services
Quality
The products are inspected, measured and monitored from incoming materials through production to delivery; the continuous collection of production data demonstrates product quality. Since 2007, the quality management system has been certified annually in accordance with DIN EN ISO 9001 by independent auditors.
| Evidence | Hardt |
|---|---|
| ISO 9001 |