Manufacturer of precision grinding wheels in ceramic and resin bond for industrial grinding applications
STELLA GRUPPE / STELLA KERAMIK GmbH
Schwarzenbach/Saale · Chemnitz · Großdubrau (Crosta)New on Amplifa
About the STELLA GRUPPE
The STELLA GRUPPE with its parent company STELLA KERAMIK GmbH develops and manufactures precision grinding wheels in ceramic and resin bond as well as high-performance abrasives. The product range covers grinding tools for surface grinding, cylindrical grinding, tool grinding, gear flank grinding, thread and worm grinding, honing and superfinishing, rough grinding, rail grinding, as well as cutting-off and rough grinding; in addition, custom grinding wheels are developed. A key focus is the processing of the grinding raw material sintered corundum; diamond and CBN are also used for dressing applications. Fields of application include, among others, gear manufacturing, track superstructure/rail technology, tool and cutting tool grinding as well as granite and stone processing. Founded in 1925, the company produces with around 100 employees at three sites in Germany, reports an export share of approx. 40 % and manufactures exclusively in Germany. At the Schwarzenbach/Saale site, four photovoltaic systems cover the energy demand predominantly from renewable sources.
- Site
- Schwarzenbach/Saale
- Processes
- Surface grinding, Cylindrical grinding, Tool grinding, Gear flank grinding, Thread and worm grinding, Honing and superfinishing, Rough grinding, Rail grinding
- Materials
- Sintered corundum, Diamond, CBN, Granite, Tool steel, HSS, Carbide, Talc
- Certificates
- ISO 9001, VDS membership
- Founded
- 1925
- Employees
- approx. 100
- Industries
- Gear manufacturing, Honing and superfinishing, Track superstructure / rail technology, Tool grinding, Cutting tools, Granite and stone processing
- 01
Raw material preparation (among others sintered corundum)
- 02
R&D for bonding systems and custom grinding wheels
- 03
Manufacturing in ceramic and resin bond
- 04
Quality inspection to ISO 9001
- 05
Stock program and logistics
- 06
Consulting and application-specific support
Bonding systems & grinding raw materials
Sintered corundum
Grinding raw material with extensive experience, in particular for gear manufacturing, honing and track superstructure.
Diamond
Superhard dressing material for dressing grinding tools.
CBN
Cubic boron nitride for dressing grinding applications.
Ceramic bond
Bonding system for conventional special grinding wheels.
Resin bond
Bonding system for grinding wheels since the founding in 1925.
Granite/Talc
Raw material base of WEFRA for cutting discs for granite processing.
Sites
Schwarzenbach/Saale
DEMain plant and company headquarters (STELLA KERAMIK GmbH, WEFRA SCHLEIFMITTEL GmbH)
- Materials
- Sintered corundum, ceramic and resin bond
- 4 photovoltaic systems
Products
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Surface grindingAbrasives | – | – | – | – | – |
| Cylindrical grindingAbrasives | – | – | – | – | – |
| Tool grindingAbrasives | – | – | – | – | Tool steel, HSS, Carbide |
| Gear flank grindingAbrasives | – | – | – | – | – |
| Thread and worm grindingAbrasives | – | – | – | – | – |
| Honing and superfinishingAbrasives | – | – | – | – | – |
| Rough grindingAbrasives | – | – | – | – | – |
| Rail grindingAbrasives | – | – | – | – | – |
| Cutting-off and rough grindingAbrasives | – | – | – | – | – |
| Dressing grinding (diamond and CBN)Abrasives | – | – | – | – | – |
| Custom grinding wheelsAbrasives | – | – | – | – | – |
| Manufacturing of grinding wheels in ceramic bondAbrasives | – | – | – | – | – |
| Manufacturing of grinding wheels in resin bondAbrasives | – | – | – | – | – |
| Focus on gear manufacturingAbrasives | – | – | – | – | – |
| Focus on track superstructureAbrasives | – | – | – | – | – |
| Manufacturing of high-performance abrasivesAbrasives | – | – | – | – | – |
| Production of cutting discs for granite processingAbrasives | – | – | – | – | Granite |
| Processing of sintered corundum grinding raw materialAbrasives | – | – | – | – | Sintered corundum |
| Tool grinding on pedestal grindersAbrasives | – | – | – | – | – |
| Sharpening of drills and milling cutters with profile grinding wheelsAbrasives | – | – | – | – | – |
| Sharpening of sawsAbrasives | – | – | – | – | – |
| Sharpening of knivesAbrasives | – | – | – | – | – |
| Grinding of cutting tools with grinding pointsAbrasives | – | – | – | – | – |
| Grinding of dies and punches with grinding pointsAbrasives | – | – | – | – | – |
| Deburring with grinding sticksAbrasives | – | – | – | – | – |
| Ski and snowboard grindingAbrasives | – | – | – | – | – |
| Knife grindingAbrasives | – | – | – | – | – |
| Hand stones for manual grindingAbrasives | – | – | – | – | – |
Additional services
Quality
The products are manufactured exclusively in Germany and monitored in accordance with the latest standards and norms; the company is certified to ISO 9001 and is a member of the Verband Deutscher Schleifmittelwerke (VDS).
| Evidence | Schwarzenbach/Saale |
|---|---|
| ISO 9001 | |
| VDS membership |
History
- 1925
Founding of the parent company in Marktredwitz; production of grinding wheels in magnesite, ceramic and resin bond
- 1929
Founding of WEFRA as a family business (talc mining and granite trade)
- 1955
Start of WEFRA's production of high-performance abrasives, one of the first manufacturers in Germany
- ca. 1980
Transfer of the parent company to the Dr. Herrmann family
- 1987
Integration of the company Winterling Keramik in Schwarzenbach an der Saale
- 1994
Relocation of the Marktredwitz operation to Schwarzenbach an der Saale after extensive investments
- nach 1990
Acquisition of Schmirgelwerk Chemnitz GmbH and Capillar Schleifkörperwerk GmbH after reunification
- 2015
Purchase of the neighboring property of approx. 5,600 sqm at the Schwarzenbach a.d. Saale site
- 2025
Acquisition of the business operations of WEFRA Werke and move to the new company headquarters in Schwarzenbach/Saale