
Fine finishing and polishing of injection and compression mold tool surfaces up to 3 t tool weight

ARO-TEC GmbH
Kierspe (Headquarters / Manufacturing)New on Amplifa
About ARO-TEC
ARO-TEC GmbH is a master-craftsman company founded in 1990 and headquartered in Kierspe in the Märkischer Kreis district of southwestern Westphalia, specializing in the fine finishing of tool surfaces. The company processes simple and complex surfaces on plastic injection molds as well as injection and compression tools. Its range of services includes emery-line polishing, oilstone polishing, flat lapping, rotary polishing, surface grinding, polishing under Stereo-Dynascope microscopes, and the removal of EDM marks and etching. A total of 30 different tool surface finishes in quality grades 1 to 30 are offered – from technical polishes to gloss and high-gloss polishes for visible and see-through parts. Tools with a total weight of up to 3 tonnes are processed. The quality management system is certified to DIN EN ISO 9001:2015.
- Site
- Kierspe
- Processes
- Emery-line polishing, Oilstone polishing, Emery line, bright polished, Polishing grades up to high gloss (gloss and high-gloss polishes, 30 quality grades), Line and high-gloss polishing, Flat lapping, Rotary polishing, Polishing under Stereo-Dynascope microscopes
- Materials
- Polishing (emery line, oilstone, high gloss), Flat lapping, Surface grinding
- Certificates
- DIN EN ISO 9001:2015, ISO 9001
- Founded
- 1990
- Industries
- Plastic injection molding / toolmaking, Injection and compression molds
- 01
Order acceptance and tool intake
- 02
Surface grinding
- 03
Line and high-gloss polishing
- 04
Flat lapping or rotary polishing
- 05
Microscopic fine polishing
- 06
Final inspection and delivery
Materials & Processes
Polishing (emery line, oilstone, high gloss)
Various polishing techniques for optimizing injection and compression tool surfaces in 30 quality grades.
Flat lapping
Production of absolutely flat tool surfaces.
Surface grinding
Production of flat and smooth tool surfaces as a basis for subsequent polishing.
Locations

Kierspe
DEHeadquarters / Manufacturing
- Part weight / size
- Tools up to 3 t total weight
- Materials
- Tool surfaces of injection and compression molds
- Stereo-Dynascope microscopes
Components & Services




Inside the production





Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Emery-line polishingSurface | – | – | 3 t (total tool weight) | – | – |
| Oilstone polishingSurface | – | – | 3 t (total tool weight) | – | – |
| Emery line, bright polishedSurface | – | – | 3 t (total tool weight) | – | – |
| Polishing grades up to high gloss (gloss and high-gloss polishes, 30 quality grades)Surface | – | – | 3 t (total tool weight) | – | – |
| Line and high-gloss polishingSurface | – | – | 3 t (total tool weight) | – | – |
| Flat lappingSurface | – | – | 3 t (total tool weight) | – | – |
| Rotary polishingSurface | – | – | 3 t (total tool weight) | – | – |
| Polishing under Stereo-Dynascope microscopesSurface | – | – | 3 t (total tool weight) | – | – |
| Removal of EDM marks & etchingSurface | – | – | 3 t (total tool weight) | – | – |
| Surface grindingSurface | – | – | 3 t (total tool weight) | – | – |
1 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Stereo-Dynascope microscope | – | – | – | – | Kierspe |
Additional services
Quality
The quality management system is certified to DIN EN ISO 9001:2015 by ZDH-ZERT GmbH (registration number Q1 0107035, valid until 24.07.2028). Fine finishing is partly carried out under Stereo-Dynascope microscopes for microscopic precision.
| Evidence | Kierspe |
|---|---|
| ISO 9001 |
History
- 1990
Foundation of ARO-TEC GmbH in Kierspe
- 2025
Renewal of ISO 9001 certification by ZDH-ZERT (valid until 24.07.2028)