Manufacturer of rubber rollers, plastic rollers and roller cores made to customer specification, including roller service.
Stark Gummiwalzen GmbH
Sontheim/BrenzNew on Amplifa
About us
Stark Gummiwalzen GmbH is a medium-sized, family-run business in its second generation, headquartered in Sontheim/Brenz. Since 1980, the company has manufactured ready-to-install rubber rollers, plastic rollers and roller cores precisely to customer specification, from single pieces to large-scale series. Production includes roller cores from its own turning shop (steel, stainless steel, aluminium, brass, titanium, plastic), rubber coverings and plastic coatings via injection moulding, hot-air vulcanisation and coating, as well as rubber machining and metal machining through turning, milling, welding, shrink-fitting and press-fitting. In addition, Stark offers roller service with regrinding, grooving, re-covering and core repair, assembly of assemblies, laser engraving and vacuum casting of silicone components for prototypes and small series. The rollers and roller coverings are used, among other things, in machines in the printing, textile, film, medical, metal, paper, food and aerospace industries. Around 50 employees produce on approx. 5,000 m² in four halls and supply customers on three continents; the operation manufactures using renewable energy with its own photovoltaic system.
- Site
- Sontheim/Brenz
- Processes
- Rubber roller manufacturing (rubber covering/vulcanisation), Plastic rollers (turning), Injection moulding, Hot-air vulcanisation, Coating, Vacuum casting of silicone components, Roller core manufacturing (turning), Milling
- Materials
- EPDM, NBR, SBR, FKM, PU (polyurethane), Silicone, PVC, PP
- Certificates
- Continuous quality control, DIN 701-703 (WdK guidelines), Digital machine data acquisition, ISO 9001
- Founded
- 1980
- Employees
- approx. 50
- Industries
- Printing industry, Textile industry, Film industry, Graphics industry, Wood industry, Medical industry
- 01
Engineering and material selection
- 02
Roller core manufacturing (turning, milling, welding, shrink-fitting,
- 03
Rubber covering/plastic coatings (injection moulding, hot-air vulcanisation,
- 04
Post-machining (grinding, grooving, laser engraving)
- 05
Assembly of assemblies
- 06
Quality control
Locations
Sontheim/Brenz
DEProduction and administration
- Part weight / size
- Rollers up to 2,000 mm length, up to 250 kg
- Lot size
- Single piece to large-scale series
- Materials
- EPDM, NBR, SBR, FKM, PU, silicone, PVC, PP, PEEK, POM; steel, stainless steel, aluminium, brass, titanium
- Lathes
- Vulcanisation oven (2020)
- Press (2020)
- Marking laser (2025)
Components
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Rubber roller manufacturing (rubber covering/vulcanisation)Plastics | – | 2,000 mm | up to 250 kg | Single piece – Large-scale series | EPDM, NBR, SBR, FKM, PU, silicone, customer-specific compounds |
| Plastic rollers (turning)Plastics | – | 400 mm | – | Single piece – Large-scale series | PVC, PP, PEEK, POM |
| Injection mouldingPlastics | – | – | – | – | PVC, PP, PEEK, POM |
| Hot-air vulcanisationPlastics | – | – | – | – | EPDM, NBR, SBR, FKM, PU, silicone |
| CoatingPlastics | – | – | – | – | EPDM, NBR, SBR, FKM, PU, silicone |
| Vacuum casting of silicone componentsPlastics | – | – | – | Prototypes – Small series | silicone (20-65 Shore A) |
| Roller core manufacturing (turning)Machining | – | 2,000 mm | – | Single piece – Large-scale series | steel, stainless steel, aluminium, brass, titanium, plastic |
| MillingMachining | – | – | – | Small series – Large-scale series | steel, stainless steel, aluminium, brass, plastic |
| GrindingMachining | – | – | – | – | steel, stainless steel, aluminium, brass, titanium, plastic |
| WeldingJoining | – | – | – | – | steel, stainless steel, aluminium, brass |
| Shrink-fittingJoining | – | – | – | – | steel, stainless steel, aluminium, brass |
| Press-fittingJoining | – | – | – | – | steel, stainless steel, aluminium, brass, plastic |
| StraighteningForming | – | – | – | – | steel, stainless steel, aluminium, brass, titanium |
| Rubber machining (rubber buffers, rubber feet, rubber rollers, rubber blocks, rubber rings)Plastics | – | – | – | Small series – Large-scale series | rubber, silicones, polyurethanes |
| Metal machining (brackets, brake shoes, clamps, hold-down clamps, rubber-metal buffers)Machining | – | – | – | Small series – Large-scale series | steel, stainless steel, aluminium, brass, plastic |
| Regrinding & grooving (roller service)Machining | – | – | – | – | rubber, silicone, polyurethane |
| Re-coveringPlastics | – | – | – | – | rubber, silicone, polyurethane |
| Core repair (welding/shrink-fitting and grinding)Joining | – | – | – | – | steel, stainless steel, aluminium, brass |
| Laser engraving (marking/identification)Surface | – | – | – | – | – |
| Assembly of assembliesAssembly | – | – | – | – | – |
| 3D printing (mould making)Additive | – | – | – | – | – |
| Mould casting (mould making)Plastics | – | – | – | – | – |
4 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Vulcanisation oven | – | – | – | 2020 | Sontheim/Brenz |
| Press | – | – | – | 2020 | Sontheim/Brenz |
| Marking laser (laser engraving) | – | 1 | – | 2025 | Sontheim/Brenz |
| Lathe | – | – | – | – | Sontheim/Brenz |
Additional services
Quality
Continuous quality controls ensure precision, concentricity, surface quality and dimensional accuracy of the rollers; dimensional accuracy and hardness follow the guidelines of the German rubber industry association (DIN 701-703). Production is largely digitally networked with machine data acquisition and central data analysis for quality assurance and documentation.
| Evidence | Sontheim/Brenz |
|---|---|
| Continuous quality control | |
| DIN 701-703 (WdK guidelines) | |
| Digital machine data acquisition | |
| ISO 9001 |
History
- 1980
Founded by Hans Stark as Hans Stark e.K. with a lathe in the garage.
- 1990
Construction of hall 2, acquisition of the company Knoblauch and hiring of the first apprentice.
- 2000
Construction of hall 3 and hall 4 to expand the production area.
- 2010
Bernd Stark takes over management; company renamed Stark Gummiwalzen GmbH.
- 2020
Investment in a new vulcanisation oven and a modern press.
- 2025
Purchase of a marking laser for laser engraving as well as expansion of the digitally networked production.