Development and production of custom rolling bearings and overmoulded bearing units using engineering plastics.
JESA SA
Villars-sur-Glâne (CH) · Wuxi (CN)New on Amplifa
Custom bearing solutions from Switzerland
JESA SA is a Swiss company based in Villars-sur-Glâne in the canton of Fribourg, specialising in the development, design and production of customised bearing solutions. With over 50 years of experience, JESA combines rolling bearing technology with engineering polymers, particularly in the overmoulding of bearing rings and the injection moulding of high-performance plastics such as TORLON® PAI. Its portfolio includes precision bearings, track rollers, special units, cages made of plastic, steel or brass, additively manufactured cages, as well as lubrication and sealing tailored to customer requirements. Materials used include stainless steels, Cronidur 30, Steenox, ceramics and polymers such as PEEK, PA6.6, PA12, PA4.6 and Delrin. JESA supports customers from the concept phase through simulations and prototypes to series production, supplying industries such as automotive, medical technology, textile machinery, vacuum pumps, marine and e-mobility. Since 2003, the group has operated a development and production centre in China, JESA Wuxi, built to Swiss quality standards.
- Site
- Villars-sur-Glâne
- Processes
- Development and manufacture of custom rolling bearings (roller/ball bearings, track rollers), Overmoulding of rolling bearings (overmoulded bearings, Steenox/Cronidur-30 rings), Injection moulding (e.g. Torlon PAI injection moulding processes, injection-moulded joints), Additive manufacturing of cages, Cage manufacturing: steel and brass cages by stamping, plastic cages, cageless bearings, Surface treatment / dry lubrication, Prototype manufacturing through to series production of custom bearing units, Lubrication (grease per DIN 51825 K2K, oil, solid lubricants, dry lubrication)
- Materials
- Cronidur 30, Steenox, Stainless steels, Ceramics, Torlon PAI, PEEK, Delrin, PA6.6
- Industries
- Automotive, Industrial, Medical technology, Marine/Nautical, Textile machinery, Vacuum pumps
- 01
Design and engineering
- 02
Material selection and validation
- 03
Simulations and testing
- 04
Injection moulding/overmoulding
- 05
Cage manufacturing (injection moulding, stamping, additive)
- 06
Assembly of bearing units
- 07
Lubrication and sealing
- 08
Series production
Materials and processes
Cronidur 30
Nitrogen-alloyed stainless steel for high-load, corrosion-resistant bearing rings, e.g. in marine applications.
Steenox
Stainless steel material for overmoulded bearing rings with high corrosion resistance.
Stainless steels
For bearing components in aggressive and humid environments.
Ceramics
Rolling element material for hybrid ceramic and full ceramic bearings.
TORLON® PAI
High-performance thermoplastic for injection moulding and overmoulded bearings with very high temperature resistance.
PEEK (glass-fibre reinforced 20%, PEH)
Cage material for very high operating temperatures up to 250 °C.
PA6.6 (TNH)
Thermoplastic polyamide cage for low speeds up to 80 °C.
PA6.6 glass-fibre reinforced 25% (T9H)
Cage material for high speeds and operating temperatures up to 120 °C.
PA4.6 glass-fibre reinforced 15% (TSH)
Standard cage for self-aligning ball bearings up to 120 °C.
Glass-fibre reinforced phenolic resin (TBH)
Cage material for very high speeds and temperatures up to 140 °C.
Brass
Stamped or machined cages for specific applications.
PA12
Thermoplastic for overmoulded bearings, also with additively manufactured cages.
Sites
Villars-sur-Glâne
CHHeadquarters, development and production
- Materials
- Steel, stainless steel, Cronidur 30, Steenox, ceramics, engineering plastics
- Injection moulding machines (incl. TORLON® PAI)
Wuxi
CNDevelopment and production centre (JESA Wuxi, subsidiary since 2003)
- Materials
- Steel, stainless steel, engineering plastics
- Production centre for bearing manufacturing
- Injection moulding machines
Components and applications
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Development and manufacture of custom rolling bearings (roller/ball bearings, track rollers)Assembly | – | – | – | – | Steel, Cronidur 30, Steenox, Ceramics, Engineering polymers (Delrin, Torlon PAI, PEEK) |
| Overmoulding of rolling bearings (overmoulded bearings, Steenox/Cronidur-30 rings)Plastics | – | – | – | – | Steenox, Cronidur 30, PA6.6, PA12, Torlon PAI |
| Injection moulding (e.g. Torlon PAI injection moulding processes, injection-moulded joints)Plastics | – | – | – | – | Torlon PAI, Thermoplastics |
| Additive manufacturing of cagesAdditive | – | – | – | – | Thermoplastics, PA6.6, PA12 |
| Cage manufacturing: steel and brass cages by stamping, plastic cages, cageless bearingsForming | – | – | – | – | Brass, Steel, PA6.6, Glass-fibre reinforced PA6.6, PEEK, PA4.6, Phenolic resin, Brass (machined) |
| Surface treatment / dry lubricationSurface | – | – | – | – | – |
| Prototype manufacturing through to series production of custom bearing unitsEngineering | – | – | – | – | – |
| Lubrication (grease per DIN 51825 K2K, oil, solid lubricants, dry lubrication)Assembly | – | – | – | – | – |
2 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Injection moulding machines (incl. Torlon PAI injection moulding) | – | – | – | – | Villars-sur-Glâne, Switzerland / Wuxi, China |
| Production centre (bearing manufacturing, state-of-the-art production capacity) | – | – | – | – | Wuxi, China |
Additional services
History
Over 50 years of experience in the design and production of specific rolling bearings
- 2001
JESA becomes part of the POLYGENA Group (canton of St. Gallen)
- 2003
Founding of the Chinese subsidiary JESA Wuxi