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The JESA group


Since 2001, JESA has been an integral part of the POLYGENA group, situated in the canton of St. Gall and chaired by Monsieur Andreas Koopmann JESA is also the grouping of the following entities :


Head office in Villars-sur-Glâne, Switzerland

Head office of the JESA Group dedicated to the development and production of standard and special bearings:

  • Group management
  • Research and development centre
  • Production unit (turning, grinding, assembly, plastic injection)
  • Quality control centre
  • Customer service, logistics and central stock


Production centre in Wuxi, China

Production centre with Swiss quality standards, worldwide coverage and state-of-the-art production capacity:

  • Production plant for standard and special ball bearings.
  • Quality control of ball bearings produced in-house or commercially.
  • Production and testing according to specifications developed in China.

Wuxi Trade Centre, China

Trade office and supplier relationship management for bearings produced in China according to Swiss requirements.



Organigramme POLYGENA Group

Key figures

2017 workforce

around 241 (around 138 in Switzerland)

Year of foundation

1969 by Messrs. Joseph and Rolf EGGER

Head office

Rte du Petit-Moncor 9, 1752 Villars-sur-Glâne | Switzerland

Production sites

Switzerland and China

Sales offices



R&D and manufacture of special and miniature ball bearings, plastic injection parts, units comprising ball bearings.

Partial markets
Market segments

Turnover by market segment

  • 57%
  • 9%
  • 24%
  • 9%
    Consumer goods
  • 1%

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