Galaxie® miniaturized

  • Miniaturized Galaxie® with axial function principle

The most compact hollow-shaft gearbox with the highest torsional rigidity

With the miniaturized Galaxie®, we have taken the functional principle of our classic Galaxie® a step further. The result: innovative kinematics enabling almost full surface contact during power transmission – with an extremely compact footprint. Thanks to this unique concept, the miniaturized Galaxie® performs significantly better than established gearbox types with the same diameter in almost all dimensions. It combines the highest levels of rigidity, torque density and overload capacity with a very large hollow shaft and maintains zero backlash throughout its entire service life. 

Find out more


  • Dimensions
  • Technical data
  • Torsional rigidity & bearing



Outer diameter

90 mm

110 mm

Overall length

55.5 mm

59.6 mm

Hollow shaft diameter

31 mm

41 mm


1.5 kg

2.5 kg









Nominal torque

70 Nm

120 Nm

Max. acceleration torque

150 Nm

250 Nm

Emergency stop torque

375 Nm

625 Nm

Max. input speed

4200 rpm

3600 rpm






Ct21 [Nm/arcmin | 10³ Nm/rad]

35 | 120

70 | 240

K31) [Nm/arcmin | 10³ Nm/rad]

24 | 83

42 | 144

K2 1) [Nm/arcmin | 10³ Nm/rad]

23 | 79

40 | 138

K11) [Nm/arcmin | 10³ Nm/rad]

17 | 58

30 | 103

Max. tilting moment

150 Nm

250 Nm



Your benefits

More precision due to:

  • Extremely high rigidity 
  • Greater damping 
  • Higher machining precision 
  • Absolute zero backlash 

Space and weight savings

  • Downsizing of drive
  • Upgrading of application with unchanged footprint
  • Efficient use of hollow shaft

Maximum safety

  • Safety reserves in case of overload
  • Minimization of downtimes, e.g. due to broken cables in supplied media

Higher productivity

  • Faster and more accurate positioning 
  • Reduced vibrations in system 
  • Minimized cable breakage

Ideally combined with the cyber® kit-line frameless motor from WITTENSTEIN cyber and with further on the market available hollow shaft motors. Connection to different standard servo systems by using specific adapter plate. 

Big hollow shaft, eg. for wiring or for integrating media and / or components 

Special tooth design for high gear ratios with almost complete surface contact