Cutting-edge, customised technology for even the most specialised application areas

Special gears

Special solutions, tailored to your requirements

The term ‘special gear’ refers to any gears that do not correspond to a standard, and that can therefore not be selected from the standard catalogue. As a rule, the necessary requirements in terms of dimensions, torques, speeds, service life, installation positions, design and number of input and output shafts, for example, cannot be met by standard gears, since the use of such gears inevitably means a compromise. Only a “lid manufacturer” can provide you with the right “lid” for your “pot”. Special gears have been specially developed, designed, produced and assembled according to customer requirements.


The special gearboxes, which correspond exactly to the requirements of the customer, are characterized by their robustness, longevity and efficiency. If we do not have gearboxes that the customer needs, these are developed in cooperation with the customer.

We offer the optimal solution for your product requirements in the areas

  • Spur gears
  • Planetary gears
  • Bevel gears
  • Manual transmission


Koellmann special gears are used in the following products, for example:

  • Slip-on gears
  • Lift gears
  • Gears for construction machinery
  • Train gears
  • Differential gears
  • Rotating gears
  • Elevator gears
  • Vehicle gears
  • Conveyor belt gears
  • Free-wheel gears


Special gears from Koellmann Gear find uncompromising application in the following industries:          

  • Assembly manufacturing
  • Systems engineering
  • Automotive industry
  • Construction machinery
  • Chemical industry
  • Printing machinery
  • Vehicle manufacturing
  • Conveyor and hoisting equipment
  • Amusement park equipment
  • Beverage industry


Since special gears are very specific implementations, it is possible to take all customer wishes into account.  

These may include:

  • Taking into account the desired load spectrum
  • Safety factors
  • Gearing and roller bearing service life
  • Transmission ratios
  • Output torques of up to 300,000 Nm
  • Dimensions of the gears
  • Centre distances of the output shafts
  • Special designs upon consultation
  • Optimisation of the housing designs using the finite element method (FEM)


Koellmann Gear Sales
Tel.: +49 202 48 10
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