Series P3 - SPN Schwaben Präzision Fritz Hopf GmbH
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Engineering by SPN.

Series P3

The P3-series represents our efforts for highest precision due to the possibility of the backlash-free adjusting. The design of hollow- and planetary gears enables to remove backlash < 1’ completely.

Our planetary gear unit for high precision applications.

Design features

  • easy motor installation due to tangential-clamping with patented sun wheel fixing (without add. power absorbing bearing)
  • high approved radial forces due to optimized taper roller bearing
  • efficiency > 96%
  • backlash < 1‘ through split hollow wheel
  • any mounting position
  • high durability due to lubrification with synthec oil
  • large-dimensioned shaft sizes guarantee a high rigidity
  • Aluminium housing with ribbed surface for good heat removal for B5/B14 flanging
Options: Conditioning monitoring

Options: Conditioning monitoring

All SPN gearboxes can be equipped with an extensive
range of application-based measuring equipment to order
without this modifying the external dimensions.
The following can be recorded by this equipment:

  • Torque
  • Speed
  • Axial forces
  • Radial forces
  • Acceleration
  • Acoustic measurements
  • Oil condition
  • (Other measurements by agreement)

The measurements can be transferred by cable or by wireless means, the sensors are tailored to their task. Our Engineering Department will be delighted to place all its experience at your service to assist you with your evaluation of the signals and your choice of hardware and software.

Please contact us.


  • Information about the load status of your gearbox
  • Optimisation of procedures by a precise knowledge of operating statuses
  • Indicator for preventive maintenance

Download P3


Brochure and dimension sheet series P3

744 KB

Planetary gear P3

SPN-planetary gear P3 detail