Vacuum technology

GMN develops complete designs in collaboration with the industry for special bearings, in particular for turbo molecular pumps (TMP).


Long life guaranteed

Vacuum technology is a significant basis for research, development and the manufacture of innovative products, from semiconductors to the solar industry. The final pressure, suction performance or media resistance play a role in the application depending upon the vacuum pump design. Bearings are the heart of the vacuum pump – and only robust bearings ensure high endurance at high RPMs as well as in rough environmental conditions.


The challenge for turbo molecular pump bearings:

  • Long life expectancy
  • Absolute reliability
  • High speeds
  • Low noise level
  • Low vibration
  • Cleanliness

Optimized engineering

GMN develops customer-specific high-precision ball bearings with special dimensions, designs and cages for turbo molecular pumps.


Significant performance criteria are:

  • Product optimized bearing design
  • Use of covered bearings to protect against contamination and to increase life
  • Ceramic balls for higher speeds, minimal friction and optimized bearing dynamics
  • Integrated tribological concept (lubricant, preservation, surface quality, materials)
  • For grease lubrication use the GMN TXM cage for low-vibration and quiet operation

Request for special bearings



Spindle ball bearings for TMP

  • Open or covered
  • Silicon nitride spheres (Si3N4)
  • Vacuum to 10-3 mbar
  • Speed characteristic up to 1,1 x 106 mm/min
  • Service life > 30.000 h
  • Cages: oil impregnated hard tissue cage or TXM cage
  • Special design (dimensions, design, cage)
  • Optimized grease reservoir

Grooved ball bearings for TMP

  • Open or covered
  • Silicon nitride spheres (Si3N4)
  • Vacuum to 10-3 mbar
  • Characteristic RPM up to 0,8 x 106 mm/min
  • Oil lubrication
  • Service life > 30.000 h
  • Special design (dimensions, design, cage)