High-precision, backlash-free shaft couplings and shrink discs for drive technology, servo and high-speed drives.
GERWAH GmbH
63868 GroßwallstadtNew on Amplifa
About GERWAH
GERWAH GmbH from Großwallstadt develops and manufactures high-precision shaft couplings and shaft-hub connections for drive technology. The portfolio includes torsionally flexible elastomer jaw couplings (GWE) with nominal torques up to 2,000 Nm, torsionally rigid metal bellows couplings (GWB) made of stainless steel up to 5,000 Nm, and steel lamina couplings (TND) with lamina packs made of stainless spring steel up to 130,000 Nm. The program is complemented by the S-Line series (a combination of metal bellows coupling and plug-in connection), frictional shrink discs (Smart-Lock), intermediate shafts, and permanent magnet couplings and brakes (PETER®). The backlash-free and maintenance-free couplings are used particularly in servo systems, linear drives and high-speed drives as well as in general mechanical and plant engineering. Since its acquisition by the Swedish VBG Group in 2009, GERWAH has been part of RINGFEDER Power Transmission; the coupling series are now marketed under the RINGFEDER® brand.
- Site
- Großwallstadt
- Processes
- Elastomer jaw couplings GWE (servo insert couplings) - torsionally flexible, plug-in, backlash-free, Metal bellows couplings GWB - torsionally rigid, backlash-free, wear-free, Steel lamina couplings TND (torsionally rigid disc couplings), S-Line series: combination of metal bellows coupling with plug-in connection, Shrink discs 'Smart-Lock' (shaft-hub connections, frictional), Permanent magnet couplings and brakes (PETER®), wear-free, Safety couplings (DMK/L, DMK/LL, DMK/E, DMK/DK - discontinued since the acquisition), Intermediate shafts
- Materials
- Stainless steel, Stainless spring steel, Hardened steel, Elastomer (various hardnesses, interchangeable spider elements), Permanent magnet material, Elastomer jaw couplings GWE, Metal bellows couplings GWB, Steel lamina couplings TND
- Certificates
- DIN EN ISO 9001:2000, DIN EN ISO 9001
- Founded
- 1980
- Industries
- Drive technology, Conveying technology, Mechanical and plant engineering, Automation, Process automation, Servo systems
- 01
Design and engineering
- 02
Manufacturing of coupling components
- 03
Assembly
- 04
Testing and delivery
Materials & Products
Elastomer jaw couplings GWE
Torsionally flexible, plug-in servo insert couplings with interchangeable elastomer spider elements of various hardnesses, backlash-free up to 2,000 Nm.
Metal bellows couplings GWB
Torsionally rigid, wear-free couplings with high-quality stainless steel metal bellows up to 5,000 Nm.
Steel lamina couplings TND
Torsionally rigid disc couplings with lamina packs made of stainless spring steel up to 130,000 Nm; shaft-hub connection via keyway or shrink disc.
Stainless steel
Material for metal bellows and lamina packs as well as variants of the elastomer couplings.
Shrink discs Smart-Lock
Frictional shaft-hub connections made of steel whose concept reduces spare parts logistics costs.
Permanent magnet couplings and brakes
Wear-free couplings and brakes based on permanent magnet materials.
Safety couplings (discontinued)
Safety couplings DMK/L, DMK/LL, DMK/E, DMK/DK made of hardened steel with disengagement torques from 1.2 to 1,600 Nm; production discontinued after the Ringfeder acquisition.
Locations
Großwallstadt
DEHeadquarters and manufacturing
- Materials
- Steel, stainless steel, elastomer
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Elastomer jaw couplings GWE (servo insert couplings) - torsionally flexible, plug-in, backlash-freeJoining | – | – | – | Nominal torque up to 2,000 Nm | Steel, Stainless steel, Elastomer (various hardnesses) |
| Metal bellows couplings GWB - torsionally rigid, backlash-free, wear-freeJoining | – | – | – | Nominal torque up to 5,000 Nm | Stainless steel (metal bellows) |
| Steel lamina couplings TND (torsionally rigid disc couplings)Joining | – | – | – | Nominal torque up to 130,000 Nm | Stainless spring steel (lamina packs) |
| S-Line series: combination of metal bellows coupling with plug-in connectionJoining | – | – | – | – | Metal bellows |
| Shrink discs 'Smart-Lock' (shaft-hub connections, frictional)Joining | – | – | – | – | Steel |
| Permanent magnet couplings and brakes (PETER®), wear-freeJoining | – | – | – | – | Permanent magnet material |
| Safety couplings (DMK/L, DMK/LL, DMK/E, DMK/DK - discontinued since the acquisition)Joining | – | – | – | 1.2 Nm – 1,600 Nm | Hardened steel, Elastomer (DMK/E), Metal bellows (DMK/DK) |
| Intermediate shaftsJoining | – | – | – | – | Steel |
Quality
Production is carried out in accordance with DIN EN ISO 9001. The couplings are backlash-free and designed for high repeatability and long service life.
| Evidence | Großwallstadt |
|---|---|
| DIN EN ISO 9001 |
History
- 1980
Founding of GERWAH GmbH in Großwallstadt; pioneering components in the field of conveying and drive technology.
- 2008
Acquisition announced: The Swedish VBG Group will acquire GERWAH GmbH and its subsidiaries as of January 1, 2009.
- 2009
Acquisition by the VBG Group (parent of RINGFEDER Power Transmission GmbH, Krefeld); the safety couplings segment is later discontinued.
Renaming: All GERWAH® coupling series are now marketed under the RINGFEDER® brand.