GMN - the company - maximum precision with over 90 years of experience: Now in the fourth generation, the family-run company GMN Paul Müller Industrie GmbH & Co. KG in Nuremberg manufactures high-precision ball bearings, machine spindles, freewheel clutches and non-contact seals. A large proportion of these are tailor-made for our customers’ requirements for special applications and are used in many different ways in a broad range of applications.